A floor panel, a flooring system for a building, and a building

Abstract

Floor panel 101 comprising a plurality of joists 114 each having a top chord 115 and a bottom chord 116 iinterconnected by a webbing framework 117, the floor panel being braced by at least one strongb

Description

The present invention relates to floor panel for a flooring system, and a flooring system for a building, and in particular a flooring system for a building that houses multiple dwellings. The present invention also relates to a building comprising the flooring system, and a method of installing the flooring system. The present invention further relates to construction of at least part of the building using a building system comprising said flooring system, a method of constructing at least part of the building using the building system, and a kit of parts for use in constructing at least part of one or more units of the building. BACKGROUND Traditionally, the construction of buildings is a prolonged and time sensitive operation that has many different parts. For example, the use of poured concrete for the construction of parts of a building, such as floors, results in long wait times before any further work can be conducted on-site, as the concrete takes significant time to cure and can be prone to weather-related delays. A further issue to consider is the environmental impact relating to the use of copious amounts of concrete in the formation of floor assemblies. It has been estimated that between 4-8% of total global carbon dioxide (CO2) emissions can be attributed to concrete. The embodied emissions for the use of concrete in the construction of a building can be assigned to a multitude of different elements, such as the highly energy intensive process required for the formation of the cement used in concrete as well as the reinforcement meshes used in formation of the concrete floor. Also, the logistical impact of the transport of the materials used for concrete as well as the concrete itself, and fuel usage associated with the use of vehicles such as diggers and lorries on site also contribute to the emissions problem. For multi-story buildings, this environmental impact will be further exacerbated, as concrete may be required for construction of each of the floors of the building. To reduce the embodied carbon of a building, the construction of wooden buildings such as timber-framed buildings have grown in popularity. Furthermore, the prefabrication of wooden panels in a factory environment for subsequent erection on-site, or in preconstructed modules has also led to such building approaches becoming popular, as they speed up the construction process significantly. However, for multi-story dwellings that house multiple units, such as multiple dwellings, there are other aspects to consider. For example, the transmission of noise from one dwelling to another dwelling situated beneath may be considered as a nuisance. Whilst prefabricated wooden flooring systems may counteract some of the issues listed above, such as embodied carbon and speed of construction, they may be more prone to transmitting noise from one dwelling to another dwelling situated below. Additionally, for multi-story buildings, it is of utmost importance that, in the event of a fire, the building is designed to provide residents of the building with as much time as possible to escape. This is particularly important for buildings housing multiple dwellings, as occupants may be unaware of a fire breaking out within the building until an alarm is raised, and it also provides emergency services with additional time to contain the spread of fire once the alarm is raised. It is therefore an object of the present invention to mitigate or obviate the concerns and disadvantages as detailed above. SUMMARY According to a first aspect of the present invention there is provided a flooring system for a building. Ideally, the flooring system comprises one or more floor panels. Ideally, the flooring system comprises a sound-absorbing layer. Ideally, the flooring system comprises a screed layer. Ideally, the flooring system is configurable to separate units within a building. Ideally, the flooring system is configurable to separate two units within a building. Ideally, the flooring system is locatable between two units of a building. Ideally, the flooring system is configured to separate two units of a building. Ideally, the flooring system is configurable to separate dwellings within a building. Ideally, the flooring system is configurable to separate two dwellings within a building. Ideally, the flooring system is locatable between two dwellings of a building. Ideally, the flooring system is configured to separate two dwellings of a building. Ideally, the flooring system is configured to form part of a fire compartment of a building. Ideally, the flooring system is configured to form part of a fire compartment of a unit of a building, said building comprising two or more units. Ideally, the flooring system is configured to act as a fire barrier between units, said units being separated by the flooring system. Ideally, the flooring system is configured to form part of a fire compartment of a dwelling of a building, said building comprising two or more dwellings. Ideally, the flooring system is configured to form part of a fire compartment of a dwelling of a building, said building comprising two or more dwellings, and wherein the two or more dwellings are discrete fire compartments. Ideally, the flooring system is configured to form part of a fire compartment of a dwelling of a building, said building comprising two or more dwellings, and wherein the two or more dwellings are discrete fire compartments that are stacked vertically within the building. Ideally, the flooring system is configured to prevent or slow the spreading of fire between dwellings within a building. Ideally, the flooring system is configured to prevent or slow the spread of fire from one unit to another unit or units within the building. Ideally, the flooring system is configured to prevent or slow the spread of fire from one dwelling to another dwelling or dwellings within the building. Ideally, the flooring system is configured to act as a fire barrier between dwellings, said dwellings being separated by the flooring system. Ideally, the flooring system is configured to prevent or slow the spread of fire from one dwelling to another dwelling or dwellings within the building. Ideally, the flooring system is configured to resist fire for at least 60 minutes. Ideally, the flooring system is configured to have a fire resistance of at least 60 minutes. Ideally, the flooring system is configured to bear loads without the loss of structural stability for at least 60 minutes in the event of a fire. Ideally, the flooring system is configured to bear loads without the loss of structural stability for at least 60 minutes in the event of a fire within a dwelling that is separated by said flooring system from another dwelling. Ideally, the flooring system is configured to prevent the passage or production of gas or vapour arising from a fire in one unit to another unit or units within the building for at least 60 minutes. Preferably, the flooring system is configured to withstand exposure to fire and prevent or slow the heat transfer resulting from a fire within one unit to another unit for a period of at least 60 minutes. Preferably, the flooring system is configured to inhibit the transmission of sound. By sound, we main airborne sound and / or impact sound. Preferably, the flooring system between units within a building. Preferably, the flooring system between two units within a building. is is configured configured to to inhibit inhibit the the transmission transmission of of sound sound Preferably, the flooring system is configured to inhibit the transmission of sound between dwellings within a building. Preferably, the flooring system is configured to inhibit the transmission of sound between two dwellings within a building. Preferably, the flooring system is configured to inhibit the transmission of sound between two units within a building, said flooring system separating said two units within a building. Preferably, the flooring system is configured to inhibit the transmission of sound between two dwellings within a building, said flooring system separating said two dwellings within a building. Preferably, at least one floor panel of the one or more floor panels is prefabricated. Beneficially prefabricated enables the rapid and systematic installation of the flooring system on-site, optimises material utilisation and reduces site-generated waste. Preferably, at least one floor panel of the one or more floor panels is prefabricated in an off-site location. By off-site location, we mean a factory environment. Preferably, at least one floor panel of the one or more floor panels may comprise a floor panel decking. Ideally, the floor panel decking comprises oriented strand board (OSB), or any other suitable decking material. Ideally, the floor panel decking has a minimum depth of at least 18 mm. Optionally, the flooring system may further comprise at least one rim board. Preferably, at least one floor panel of the one or more floor panels comprises an insulating material. Ideally, the insulating material is a non-combustible insulating material. Ideally, the non-combustible insulating material comprises mineral wool or rockwool or fibreglass. Ideally, the insulating material is locatable within at least one floor panel of the one or more floor panels. In some embodiments, the insulating material is inserted into at least one floor panel of the one or more floor panels in an off-site location. In other embodiments, the insulating material is inserted at least one floor panel of the one or more floor panels on-site. In some embodiments, the insulating material is inserted into at least one floor panel of the one or more floor panels prior to installation of the one or more floor panels. In other embodiments the insulating material is inserted into at least one floor panel of the one or more floor panels subsequent to installation of the one or more floor panels. Ideally, the insulating material comprises a depth of at least 100 mm. Preferably, the insulating material is configured to inhibit the transmission of sound between units within a building. Preferably, the insulating material is configured to inhibit the transmission of sound between two units within a building. Preferably, the insulating material between dwellings within a building. Preferably, the insulating material between two dwellings within a building. Preferably, the insulating material is configured to inhibit the transmission of sound is configured to inhibit the transmission of sound is configured to inhibit the transmission of sound between two units within a building, said flooring system separating said two units within a building. Ideally, the insulating material comprises a density of at least 10 kg / m3. Preferably, the insulating material comprises a density between 10 and 45 kg / m3. Preferably, the insulating material is configured to absorb transmitted sound. Preferably, the flooring system is configured to inhibit the transmission of sound between two dwellings within a building, said flooring system separating said two dwellings within a building. Ideally, the or each floor panel of the one or more floor panels comprises a plurality of joists. Ideally, each joist of the plurality of joists has a depth of at least 225 mm. In preferred embodiments, at least part of the plurality of joists is formed from wood. More specifically, at least part of the plurality of joists is formed from timber, and in particular structural grade treated timber. In other embodiments, the plurality of joists is wholly formed from wood or metal. Preferably, each joist of the plurality of joists may be spaced apart from an adjacent joist to form a series of cavities therebetween and most preferably in a parallel orientation. Beneficially, this allows the insulating material to be inserted into the cavities formed between the plurality of joists. Ideally, each joist of the plurality of joists comprises a top chord and bottom chord. Preferably the top chord and the bottom chord are formed from wood. Preferably, the top chord and the bottom chord are formed from timber, and more specifically, structural grade treated timber. Preferably, each joist of the plurality of joists comprises a webbing framework configured to interconnect the top chord and the bottom chord. Preferably, said top chord and bottom chord being spaced apart from each other to form a cavity between said top chord and said bottom chord. Preferably, said top chord and bottom chord being spaced apart vertically from each other to form a cavity between said top chord and said bottom chord. Ideally, the webbing framework has an open-web configuration. Therefore, the or each floor panel of the one or more panels may be described as comprising an open-web configuration. Beneficially, the open web configuration facilitates the fixing of lifting straps used for offloading the one or more floor panels from a lorry that has delivered said one or more floor panels from a factory and / or for lifting and positioning the one or more floor panels onsite. Yet further advantageously, the open-web configuration of the or each floor panel of the one or more floor panels enables the or each floor panel of the one or more floor panels to be braced using at least one bracing member configured to extend transversely to the direction of the plurality of joists and between the open-webbing of the plurality of joists. Yet even further advantageously, the open-web configuration of the or each floor panel of the one or more floor panels enables the insulating material to be laid as a continuous layer of insulating material across the flooring system, thereby reducing thermal bridging and improving the thermal efficiency of the flooring system. Ideally, the at least one bracing member comprising at least one strongback. Preferably, the at least one bracing member may brace more than one floor panel. Ideally, the, or each, bracing member may brace more than one floor panel. Ideally, the webbing framework is a metallic webbing framework. Beneficially, the use of a metallic webbing framework, particularly one with an open-webbing configuration, assists in extending span potential beyond that of solid timber joists, which reduces the need for intermediate structural supports and enhances design flexibility. Furthermore, such a framework maximises load-bearing capacity whilst minimising dead load, enables even distribution of loads, reduces point loads that contribute to settlement and also assists in making handling and installation easier. Preferably, at least one floor panel of the one or more floor panels is configured to inhibit the transmission of vibrations between dwellings. Preferably, the or each floor panel of the one or more floor panels is configured to inhibit the transmission of vibrations between dwellings. Preferably, at least one floor panel of the one or more floor panels is braced to inhibit the transmission of vibrations between dwellings, wherein the flooring system separates said dwellings. Preferably, the or each floor panel of the one or more floor panels is braced to inhibit the transmission of vibrations between dwellings, wherein the flooring system separates said dwellings. Preferably, at least one floor panel of the one or more floor panels is braced to inhibit the transmission of vibrations between dwellings, wherein the flooring system is locatable between said dwellings. Preferably, the or each floor panel of the one or more floor panels is braced to inhibit the transmission of vibrations between dwellings, wherein the flooring system is locatable between said dwellings. Ideally, at least one floor panel of the one or more floor panels is configured to be stiffened. Ideally, the or each floor panel of the one or more floor panels is configured to be stiffened. Ideally, at least one floor panel of the one or more floor panels is stiffened. Ideally, the or each floor panel of the one or more floor panels is stiffened. Ideally, the or each floor panel of the one or more floor panels is stiffened to inhibit the transmission of vibrations between units. Ideally, at least one floor panel of the one or more floor panels is stiffened to inhibit the transmission of vibrations between units. Ideally, the or each floor panel of the one or more floor panels is stiffened to inhibit the transmission of vibrations between dwellings. Ideally, at least one floor panel of the one or more floor panels is stiffened to inhibit the transmission of vibrations between dwellings. Ideally, the or each floor panel of the one or more floor panels is stiffened to inhibit the transmission of vibrations between units, said units separated by the flooring system. Ideally, at least one floor panel of the one or more floor panels is stiffened to inhibit the transmission of vibrations between units, said units separated by the flooring system. Ideally, the or each floor panel of the one or more floor panels is stiffened to inhibit the transmission of vibrations between dwellings. Ideally, at least one floor panel of the one or more floor panels is stiffened to inhibit the transmission of vibrations between dwellings. Ideally, the or each floor panel of the one or more floor panels is braced using at least one bracing member, and more specifically, at least one strongback. In use, the at least one strongback in the or each floor panel of the one or more floor panels extends through the webbing framework having an open-web configuration in a direction that is perpendicular to the vertical plane of the plurality of joists. Advantageously, the bracing of the or each floor panel of the one or more floor panels using at least one strongback stiffens the or each floor panel such that the or each floor panel of the one or more floor panels is configured to inhibit the transmission of vibrations from usage of or impact on the flooring system. Ideally, where more than one bracing member is used, each bracing member is located at 1.75m centres or less within the flooring system. Ideally, where the or each floor panel is braced with more than one bracing member, each bracing member is located at 1,75m centres or less within the or each floor panel. Ideally, where more than one bracing member is used, each bracing member is located at 1.75 m or 1.5m centres within the flooring system. Beneficially, this stiffens the or each floor panel of the one or more floor panels and inhibits the transmission of structure-borne sound from one unit to another unit or units. Ideally, the flooring system is configurable to be top hung. Preferably, at least part of the flooring system is configurable to be top hung. Ideally, the at least part of the flooring system configurable to be top hung being the one or more floor panels. Ideally, the flooring system is configured to be top hung. Preferably, at least part of the flooring system is configured to be top hung. Ideally, the at least part of the flooring system configured to be top hung being the one or more floor panels. Advantageously, wherein the flooring system, and in particular the one or more floor panels has a top-hung configuration, the flooring system is configured to inhibit transmission of sound transmitted by flanking, and more specifically, the flooring system is configured to inhibit transmission of sound transmitted by flanking from unit to another unit or units within the building. Ideally, the flooring system is configurable to be top hung from a wall of the building. Ideally, at least part of the flooring system is configured to be top hung from a wall of the building. Ideally, the at least part of the flooring system configured to be top hung being the one or more floor panels. Advantageously, the top hung configuration of the flooring system, and in particular, the top hung configuration of the one or more floor panels reduces thermal bridging at the wall-floor interface. Ideally, the flooring system is configurable to be top hung from a cavity wall of the building. Ideally, at least part of the flooring system is configurable to be top hung from a cavity wall of the building. Ideally, the flooring system is configurable to be top hung from an inner leaf of the cavity wall of the building. Ideally, at least part of the flooring system is configurable to be top hung from an inner leaf of the cavity wall of the building. Ideally, the flooring system is configured to be top hung from a wall of the building. Ideally, at least part of the flooring system is configured to be top hung from a wall of the building. Ideally, the flooring system is configured to be top hung from a cavity wall of the building. Ideally, at least part of the flooring system is configured to be top hung from a cavity wall of the building. The flooring system is configured to be top hung from a cavity wall of the building and / or the compartment wall of a building. At least part of the flooring system is configured to be top hung from a cavity wall of the building and / or the compartment wall of a building. In some embodiments, the one or more floor panels is configured to be top hung. In some embodiments, at least one of the one or more floor panels is configured to be top hung. In some embodiments, the or each floor panel of the one or more floor panels is configured to be top hung. In other embodiments, at least one of the one or more floor panels is hung using a mechanical fixing means such as hangers for example, or may be bottom hung. Ideally, the one or more floor panels is configurable to be top hung on the wall of the building. Preferably, at least one of the one or more floor panels is configurable to be top hung on the wall of a building. Preferably, the or each floor panel of the one or more floor panels is configurable to be top hung on the wall of a building. Preferably, the one or more floor panels is configurable to be top hung on the cavity wall of a building. Preferably, at least one of the one or more floor panels is configurable to be top hung on the cavity wall of a building. Preferably, the or each floor panel of the one or more floor panels is configurable to be top hung on the cavity wall of a building. Ideally, one or more floor panels is configured to be top hung from a cavity wall of the building and / or the compartment wall of a building. Ideally, at least one of the one or more floor panels is configured to be top hung from a cavity wall of the building and / or the compartment wall of a building. Ideally, the or each floor panel of the one or more floor panels is configured to be top hung from a cavity wall of the building and / or the compartment wall of a building. Ideally, the one or more floor panels is configurable to be top hung on the inner leaf of the cavity wall of a building Ideally, at least one of the one or more floor panels is configurable to be top hung on the inner leaf of the cavity wall of a building. Ideally, the or each floor panel of the one or more floor panels is configurable to be top hung on the inner leaf of the cavity wall of a building. Preferably, the one or more floor panels is configurable to be supported on an inner leaf of the cavity wall. Preferably, at least one of the one or more floor panels is configurable to be supported on an inner leaf of the cavity wall. Preferably, the or each floor panel of the one or more floor panels is configurable to be supported on an inner leaf of the cavity wall. Preferably, the one or more floor panels is configured to be top hung on the wall of a building. Preferably, at least one floor panel of the one or more floor panels is configured to be top hung on the wall of a building. Preferably, the or each floor panel of the one or more floor panels is configured to be top hung on the wall of a building. Preferably, the one or more floor panels is configured to be top hung on the cavity wall of a building. Preferably, at least one floor panel of the one or more floor panels is configured to be top hung on the cavity wall of a building. Preferably, the or each floor panel of the one or more floor panels is configured to be top hung on the cavity wall of a building. Ideally, the one or more floor panels is configured to be top hung on the inner leaf of the cavity wall of a building. Ideally, at least one floor panel of the one or more floor panels is configured to be top hung on the inner leaf of the cavity wall of a building. Ideally, the or each floor panel of the one or more floor panels is configured to be top hung on the inner leaf of the cavity wall of a building. Preferably the one or more floor panels is configured to be supported on an inner leaf of the cavity wall. Preferably at one least floor panel of the one or more floor panels is configured to be supported on an inner leaf of the cavity wall. Preferably, the or each floor panel of the one or more floor panels is configured to be supported on an inner leaf of the cavity wall. In some embodiments, at least one floor panel of the one or more floor panels comprises a projecting portion. Ideally, the projecting portion projects from at least part of one edge portion of the at least one floor panel. In some embodiments, the or each floor panel of the one or more floor panels comprises the projecting portion. Preferably, the projecting projects from at least part of one edge portion of the or each floor panel. Ideally, the projecting portion comprises an underside recess extending along one edge portion of the panel. Ideally, the projecting portion has a flat underside surface for engaging an upper surface of a building component arrangeable beneath said projecting portion. Ideally, the projecting portion has a flat upper surface for engaging a lower surface of a building component mountable thereon. Preferably, the building component mountable thereon may be a wall panel. Ideally, the building component arrangeable beneath forms a part of the wall of the building. Preferably, the building component arrangeable beneath may be a wall panel or the at least one rim board. Preferably, the building component arrangeable beneath forms a part of the cavity wall of the building, and more particularly, a part of the inner leaf of the cavity wall of the building. Ideally, the building component mountable thereon forms a part of the wall of the building. Preferably, the building component mountable thereon forms a part of the cavity wall of the building, and more particularly, a part of the inner leaf of the cavity wall of the building. Preferably, the projecting portion is a rectangular slab portion formed for resting between the building component arrangeable beneath and the building component mountable there above. Preferably, the underside recess comprises a rectangular cutaway portion formed for receiving the building component arrangeable beneath forming a part of the inner leaf of the cavity wall. Ideally, the at least one rim board is configured to engage with the flat underside surface of the projecting portion. Ideally, the at least one rim board engages with the flat underside surface of the projecting portion. Ideally, wherein the one or more floor panels is configured to be top hung, and wherein the flooring system further comprises at least one rim board engaging the flat underside surface of the projecting portion, an insulation means may be inserted in the underside recess locatable between the at least one rim board and the one or more floor panels. Beneficially, this improves the thermal efficiency of the flooring system and reduces thermal bridging. Ideally, the building is a multi-story building. Preferably, the building comprises two or more stories. Ideally, the building comprises a plurality of units. Preferably, each unit of the plurality of units is configured to be a fire compartment. Ideally, each unit of the plurality of units is configured to be a discrete fire compartment. Ideally, at least two or more units of the plurality of units are stacked vertically within the building. In preferred embodiments, each unit of the plurality of units is a dwelling. In other embodiments, at least one unit of the plurality of units may comprise a commercial unit or healthcare unit for example. Ideally, the building comprises at least two or more dwellings. Ideally, the building comprises at least two or more units, wherein each unit of the two or more units are stackable in a vertical direction. Ideally, the building comprises at least two or more units, wherein each unit of the two or more units are stackable vertically. Ideally, the building comprises at least two or more units, wherein each unit of the two or more units are stacked in a vertical direction. Ideally, the building comprises at least two or more units, wherein each unit of the two or more units are stacked vertically. Ideally, the building comprises a plurality of dwellings. Ideally, at least two dwellings within the plurality of dwellings are stacked vertically. Ideally, the flooring system is locatable between two units of the building. Ideally, the flooring system is configured to separate two units of the building. Ideally, the flooring system is configured to separate two dwellings of the building. Ideally, the flooring system is locatable between two units within the plurality of units. Ideally, the flooring system is configured to separate two units within the plurality of units. Ideally, the flooring system is configured to separate two dwellings within the plurality of units. Preferably, the flooring system is configured to inhibit the transmission of sound between dwellings within a building, said dwellings being vertically stacked. Preferably, the flooring system is configured to inhibit the transmission of sound between units separated by said flooring system within a building. Preferably, the flooring system is configured to inhibit the transmission of sound between two units within the plurality of units. Preferably, the flooring system is configured to inhibit the transmission of sound between two units within the plurality of units, said two units being separated by the flooring system. Preferably, the flooring system is configured to inhibit the transmission of sound between dwellings separated by said flooring system within a building. Preferably, the flooring system is configured to inhibit the transmission of sound between two dwellings within the plurality of dwellings, said two units being separated by said flooring system. Ideally, the two units being separated by said flooring system are stacked vertically. Preferably, the two units within the plurality of units comprises a first unit and a second unit. Preferably, the one or more floor panels is configured to inhibit the transmission of sound. Preferably, at least one floor panel of the one or more floor panels is configured to inhibit the transmission of sound. Ideally, the one or more floor panels contributes to the overall sound insulation of the flooring system. Preferably, the one or more floor panels is configured to inhibit the transmission of sound between units within the building. Preferably, at least one floor panel of the one or more floor panels is configured to inhibit the transmission of sound between units within the building. Preferably, the one or more floor panels is configured to inhibit the transmission of sound between two units within a building. Preferably, at least one floor panel of the one or more floor panels is configured to inhibit the transmission of sound between two units within the building. Preferably, the one or more floor panels is configured to inhibit the transmission of sound between two units within the building, said at least one floor panel being locatable between said two units within the building. Preferably, the at least one floor panel of the one or more floor panels is configured to inhibit the transmission of sound between two units within the building, said at least one floor panel being locatable between said two units within the building. Ideally, the one or more floor panels is configured to inhibit the transmission of airborne sound and / or impact sound. Preferably, at least one floor panel of the one or more floor panels is configured to inhibit the transmission of airborne sound and / or impact sound. Ideally, the sound-absorbing layer comprises an acoustic underlay. Ideally, the sound-absorbing layer is configured to inhibit the transmission of airborne sound and contributes to the overall sound insulation of the flooring system. Ideally, the sound-absorbing layer is configured to inhibit the transmission of impact sound and contributes to the overall sound insulation of the flooring system. Ideally, the sound-absorbing layer is configured to inhibit the transmission of airborne sound from one unit to another unit or units within a building. Ideally, the sound-absorbing layer is configured to inhibit the transmission of impact sound from one unit to another unit or units within a building. Ideally, the sound-absorbing layer is configured to inhibit the transmission of airborne sound between units separated by the flooring system. Ideally, the sound-absorbing layer is configured to inhibit the transmission of impact sound between units separated by the flooring system. Ideally, the sound-absorbing layer is configured to inhibit the transmission of airborne sound from one unit to another unit, wherein both units are separated by the flooring system. Ideally, the sound-absorbing layer is configured to inhibit the transmission of impact sound from one unit to another unit, wherein both units are separated by the flooring system. Ideally, the sound-absorbing layer contributes to the overall sound insulation of the flooring system. Ideally, the sound-absorbing layer is vertically locatable above the one or more floor panels. Ideally, the sound-absorbing layer is vertically located above the one or more floor panels. Ideally, the sound-absorbing layer is located on the one or more floor panels. Ideally, the sound-absorbing layer is located on the one or more floor panels. Ideally, the sound-absorbing layer is locatable beneath the screed layer. Ideally, the sound-absorbing layer is located beneath the screed layer. Ideally, the sound-absorbing layer is adhered to the one or more floor panels. Ideally, the sound-absorbing layer is disposed between the one or more floor panels and the screed layer. Ideally, the sound-absorbing layer is vertically locatable beneath the screed layer. Ideally, the sound-absorbing layer is configured to decouple the screed layer from the one or more floor panels. By decouple, we mean to separate the screed layer from the one or more floor panels so that they are not in direct contact with each other. Beneficially, this configuration inhibits the transmission of airborne sound and impact sound from one unit to another unit or units within the building. Ideally, the screed layer is configured to inhibit the transmission of sound. Ideally, the screed layer contributes to the overall sound insulation of the flooring system. Preferably, the screed layer is configured to inhibit the transmission of sound between units within the building. Preferably, the screed layer is configured to inhibit the transmission of sound between units within a building, said units being vertically stacked. Preferably, the screed layer is configured to inhibit the transmission of sound between two units within the building. Preferably, the screed layer is configured to inhibit the transmission of sound between two units separated by said flooring system for the building. Ideally, the screed layer is formable by pouring of screed. Ideally, the screed being a pourable liquid screed. Preferably, the screed layer is formed by pouring. Preferably, the screed layer is poured on-site. By on-site, we mean at a building site wherein a building is being constructed. Preferably, the screed layer is poured on top of the sound-absorbing layer of the flooring system. Preferably, the screed layer is poured subsequent to installation of the soundabsorbing layer. Ideally, the screed layer has a minimum depth of 35 mm. Ideally, the screed layer has a minimum depth of 50 mm. In some embodiments, the screed layer comprises gypsum. Preferably, the liquid screed comprises gypsum. Advantageously, the gypsum-based screed sets more quickly in comparison to cement-based screeds, thereby enabling workers to come on-site for further building works more quickly. Further advantageously, the gypsum-based screed is configured to have minimal shrinkage and thus minimal cracking, thereby ensuring that the integrity of the layer is maintained after drying. Ideally, the pourable screed is a self-leveling liquid screed. Ideally, the pourable screed comprises a binder that is derived from an industrial byproduct (e.g. power station ash). Ideally, the pourable screed is a pumpable screed. Ideally, the pourable screed comprises an alpha hemihydrate based binder. Ideally, the flooring system is configured to prevent or slow the spreading of fire from dwellings within a building, said dwellings being vertically stacked. Ideally, the flooring system is configured to prevent or slow the spreading of fire between dwellings separated by said flooring system. Ideally, the flooring system is configured to prevent or slow the spreading of fire between two dwellings separated by said flooring system. Ideally, the flooring system comprises a fire-resistant layer. Ideally, the fire-resistant layer is configured to prevent or slow the spreading of fire. Ideally, the fire-resistant layer is configured to prevent or slow the spreading of fire from one dwelling to another dwelling or dwellings within a building. Ideally, the fire-resistant layer is configured to be an imperforate fire-resistant layer. Ideally, the fire-resistant layer comprises at least one layer of fire-resistant board. In preferred embodiments, the fire-resistant layer comprises two or more layers of fire-resistant boards. Ideally, the two or more layers of fire-resistant boards are two or more layers of imperforate fire-resistant boards. Ideally, each layer of fire-resistant board comprises at least one fire-resistant building board. Ideally, each layer of fire-resistant board comprises at least one fire-resistant and imperforate building board. Ideally, the fire-resistant building board comprises plasterboard, and more specifically a gypsum-based type F rated plasterboard. Ideally, the fire-resistant layer is locatable beneath the one or more floor panels. Preferably, the fire-resistant layer is arrangeable beneath the one or more floor panels. Preferably, the fire-resistant layer is arranged beneath the one or more floor panels. Preferably, the fire-resistant layer is arranged beneath the underside of the one or more floor panels. Ideally, the fire-resistant layer is arranged beneath the bottom chord of the one or more floor panels. Ideally, the fire-resistant layer is fixable to the one or more floor panels. Ideally, the fire-resistant layer is fixed to the one or more floor panels. Preferably, the fire-resistant layer is fixed to the underside of the one or more floor panels. Preferably, the fire-resistant layer is fixed to the bottom chord of the one or more floor panels. Ideally, the fire-resistant layer is fixed to the one or more floor panels using a means for fixing the fire-resistant layer to the one or more floor panels. Ideally, the means for fixing the fire-resistant layer to the one or more floor panels comprises at least one mechanical fixing member. In preferred embodiments, the means for fixing the fire-resistant layer to the one or more floor panels comprises a resilient bar. In preferred embodiments, the at least one mechanical fixing member comprises at least one resilient bar. In other embodiments, the means for fixing the fire-resistant layer to the one or more floor panels comprises nails and / or screws. In other embodiments, the at least one mechanical fixing member comprises a nail and / or screw. Ideally, the means for fixing the fire-resistant layer to the one or more floor panels contributes to the overall sound insulation of the flooring system. Preferably, the means for fixing the fire-resistant layer to the one or more floor panels is configured to inhibit the transmission of sound between dwellings within a building. Preferably, the means for fixing the fire-resistant layer to the one or more floor panels is configured to inhibit the transmission of sound between two dwellings within a building. Preferably, the means for fixing the fire-resistant layer to the one or more floor panels is configured to inhibit the transmission of sound between two dwellings within a building, said means for fixing the fire-resistant layer to the one or more floor panels being locatable between said two dwellings within a building. Ideally, the means for fixing the fire-resistant layer to the one or more floor panels is configured to inhibit the transmission of structure-borne vibrations resulting from an impact on, or vibration against, the flooring system. Ideally, the means for fixing the fire-resistant layer to the one or more floor panels is arranged to mitigate the transmission of sound. In preferred embodiments, the means for fixing the fire-resistant layer to the one or more floor panels is interposed between the one or more floor panels and the fire-resistant layer. Ideally, the means for fixing the fire-resistant layer to the one or more floor panels is configured to decouple the fire-resistant layer from the one or more floor panels. By configured to decouple, we mean that to separate the fire-resistant layer from the one or more floor panels such that the fire-resistant layer and the one or more floor panels are not in direct contact with each other. Advantageously, this reduces the surface area available for transmission of structure-borne sound from one unit to another unit or units within the building. Ideally, the resilient bar is interposed between the one or more floor panels and the fire-resistant layer. Ideally, the fire-resistant layer is suspended from the one or more floor panels via the means for fixing the fire-resistant layer to the one or more floor panels. Ideally, the flooring system further comprises a ceiling layer. Ideally, the ceiling layer is arranged beneath the one or more floor panels. Ideally, the ceiling layer is arranged beneath the fire-resistant layer. Ideally, the ceiling layer is arranged beneath and fixed to the fire-resistant layer using a fixing arrangement. Ideally, the flooring system comprises a service layer. Ideally, the service layer being locatable between the ceiling layer and fire-resistant layer. Ideally, the service layer being disposed between the ceiling layer and fire-resistant layer. Ideally, the service layer is located between the ceiling layer and fire-resistant layer. Preferably, the service layer accommodates technical services and equipment therefor. Ideally, technical services and / or equipment therefor is locatable within the service layer. Ideally, the flooring system comprises a fixing arrangement for mounting the ceiling layer to the fire-resistant layer. Ideally, the ceiling layer is mountable to the fire-resistant layer. Preferably, the ceiling layer is mountable to the fire-resistant layer using the fixing arrangement for mounting the ceiling layer to the fire-resistant layer. Ideally, the ceiling layer is configured to be a ceiling. Preferably, the ceiling layer comprises plasterboard. Ideally, the fixing arrangement comprises a bracket. Ideally, the fixing arrangement for mounting the ceiling layer to the fire-resistant layer contributes to the overall sound insulation of the flooring system. Preferably, the fixing arrangement for mounting the ceiling layer to the fire-resistant layer is configured to inhibit the transmission of sound between dwellings within the building. Preferably, the fixing arrangement for mounting the ceiling layer to the fire-resistant layer is configured to inhibit the transmission of sound between two dwellings within the building. Preferably, the fixing arrangement for mounting the ceiling layer to the fire-resistant layer is configured to inhibit the transmission of sound between two dwellings within the building, said fixing arrangement for mounting the ceiling layer to the fire-resistant layer being locatable between said two dwellings within a building. Ideally, the fixing arrangement for mounting the ceiling layer to the fire-resistant layer is configured to inhibit the transmission of impact sound. Ideally, the fixing arrangement for mounting the ceiling layer to the fire-resistant layer is configured to inhibit the transmission of airborne sound and / or impact sound. Ideally, the fixing arrangement for mounting the ceiling layer to the fire-resistant layer is arranged to inhibit the transmission of sound. Ideally, the fixing arrangement for mounting the ceiling layer to the fire-resistant layer is configured to decouple the ceiling layer from the fire-resistant layer. By configured to decouple, we mean that to separate the fire-resistant layer from the ceiling layer such that the fire-resistant layer and the at least one ceiling layer are not in direct contact with each other. Advantageously, this reduces the surface area available for transmission of structure-borne sound from one unit to another unit or units within the building. Ideally, the fixing arrangement is arranged beneath the one or more floor panels. Preferably, the fixing arrangement is arranged beneath the fire-resistant layer. In preferred embodiments, the fixing arrangement comprises one or more bracket assemblies for mounting the ceiling layer to the fire-resistant layer. In other embodiments, the fixing arrangement comprises one or more battens interposed between the ceiling layer and the fire-resistant layer, said batten arranged to engage both the ceiling layer and the fire-resistant layer. Ideally, the or each bracket assembly comprises a bracket. Ideally, the or each bracket assembly comprises a mounting member. Ideally, the bracket has a respective mounting member. Ideally, the bracket is configured to engage the respective mounting member. Ideally, the mounting member is fixable to the ceiling layer. In some embodiments, the mounting member comprises a batten. Ideally, said batten is fixable to the ceiling layer. Ideally, the mounting member is arranged to engage the ceiling layer and the bracket. Preferably, the batten is fixed to the ceiling layer. Ideally, the bracket is configured to engage the respective batten. Ideally, the bracket has a U-shaped configuration. Preferably, the bracket is metallic. Preferably, the bracket comprises a mounting portion configured to engage the fire-resistant layer. Ideally, the mounting portion being a central mounting portion. Ideally, the mounting portion comprising a flat surface configured to engage the fire-resistant layer. Ideally, the mounting portion comprises at least one aperture configured to receive a mechanical fastening member, such as a nail or screw. Ideally, the mounting portion is fixed to the fire-resistant surface by mechanically fastening the mounting portion to the fire-resistant layer. Ideally, the mounting portion is fixed to the fire-resistant layer by mechanically fastening the mounting portion to the underside of the fire-resistant layer. Ideally, the bracket of comprises at least one mounting leg. Ideally, the or each mounting leg of the at least one mounting leg extends perpendicularly from the flat surface of the mounting portion. Ideally, in use, the or each mounting leg of the at least one mounting leg extends perpendicularly to, and away from the fire-resistant layer. Ideally, the mounting portion comprises a first end and a second end. Ideally, the first end and the second end are located opposite to each other. Ideally, the first end comprises a first mounting leg. Preferably, the second end comprises a second mounting leg. Ideally, the first end comprises a first mounting leg extending perpendicularly therefrom. Preferably, the second end comprises a second mounting leg extending perpendicularly therefrom. Ideally, the first mounting leg extends perpendicularly from the mounting portion, and in particular the flat surface of the mounting portion. Ideally, a second mounting leg extends perpendicularly from the mounting portion, and in particular the flat surface of the mounting portion. Preferably, in use, the first mounting leg extends perpendicularly to, and away from the fire-resistant layer. Preferably, in use, the second mounting leg extends perpendicularly to, and away from the fire-resistant layer. Ideally, the or each mounting leg of the at least one mounting leg comprises an engaging portion. Ideally, the engaging portion of the or each mounting leg is configured to engage the respective mounting member. Ideally, the engaging portion of the or each mounting leg is configured to engage the respective batten. Ideally, the engaging portion of the or each mounting leg comprises at least one aperture. Ideally, each aperture of the at least one aperture is configured to receive a mechanical fastening member, such as a nail or screw. Ideally, the engaging portion of the or each mounting leg is fixed to the respective batten by mechanically fastening the engaging portion to the respective batten. Ideally, the flooring system comprises a suspended ceiling assembly. Ideally, the suspended ceiling assembly is fixable to the one or more floor panels. Ideally, the suspended ceiling assembly is arrangeable beneath the one or more floor panels of the flooring system. Ideally, the suspended ceiling assembly is arranged beneath the one or more floor panels of the flooring system. Ideally, the suspended ceiling assembly comprises the fire-resistant layer. Ideally, the suspended ceiling assembly comprises the ceiling layer Ideally, the suspended ceiling assembly comprises the fixing arrangement for mounting the ceiling layer to the fire-resistant layer. Ideally, the suspended ceiling assembly comprises the service layer Ideally, the suspended ceiling assembly comprises the means for fixing the fire-resistant layer to the one or more floor panels. Ideally, the suspended ceiling assembly contributes to the overall sound insulation of the flooring system. Preferably, the suspended ceiling assembly is configured to inhibit the transmission of sound between units within the building. Preferably, suspended ceiling assembly is configured to inhibit the transmission of sound between two units within the building. Preferably, the suspended ceiling assembly is configured to inhibit the transmission of sound between two units within the building, said suspended ceiling assembly being locatable between said two dwellings within the building. Ideally, the suspended ceiling assembly is arranged to mitigate the transmission of sound. Ideally, the suspended ceiling assembly is configured to inhibit the transmission of impact sound. Ideally, the suspended ceiling assembly is configured to inhibit the transmission of airborne sound. Ideally, the suspended ceiling assembly comprises a first fixing means and a second fixing means. Ideally, the first fixing means is the means for fixing the fire-resistant layer to the one or more floor panels. Ideally, the first fixing means is configured to decouple the fire-resistant layer from the one or more floor panels. Preferably, the second fixing means is the fixing arrangement for mounting the ceiling layer to the fire-resistant layer. Ideally, the second fixing means is configured to decouple the ceiling layer from the fire-resistant layer. Ideally, the first fixing means and second fixing means are both arranged to inhibit the transmission of sound. According to another aspect of the present invention, there is provided a floor panel for a flooring system of a building. It will be appreciated by the reader that the floor panel may comprise any of the preferable, advantageous or optional features, components, arrangements or details as described in relation to any floor panel disclosed in any preceding aspect of the invention, and vice versa. Ideally, the floor panel comprises a plurality of joists, wherein each joist of the plurality of joists comprises a top chord and a bottom chord, and wherein each joist of the plurality of joists comprises a webbing framework configured to interconnect the top chord and the bottom chord The floor panel may be braced using at least one bracing member, wherein the at least one bracing member is at least one strongback. Ideally, the floor panel comprises a fire-resistant layer configured to prevent or slow the spreading of fire, the fire-resistant layer being fixed to the floor panel using a means for fixing the fire-resistant layer to the floor panel. Ideally, the fire-resistant layer comprises two or more layers of fire-resistant boards. Ideally, the two or more layers of fire-resistant boards are two or more layers of imperforate fire-resistant boards. Ideally, each layer of fire-resistant board comprises at least one-fire resistant building board. Ideally, the at least one fire-resistant building board comprises a gypsum-based type F rated plasterboard. Ideally, the means for fixing the fire-resistant layer to the floor panel comprises a resilient bar. Ideally, the floor panel comprises an insulating material located in the floor panel. Ideally, the insulating material is a non-combustible insulating material. Ideally, the insulating material comprises mineral wool or rockwool or fibreglass. Ideally, the insulating material has a density between 10 and 45 kg / m3. Ideally, the webbing framework has an open-web configuration. Ideally, the webbing framework is a metallic webbing framework. Ideally, the floor panel is configured to be top hung. Ideally, each joist of the plurality of joist comprises a plurality of timber blocks. Ideally, the at least one strongback comprises a plurality of strongbacks, wherein each strongback is spaced apart at 1.75 metres or less. Ideally, the at least one strongback comprises a plurality of strongbacks, wherein each strongback is spaced apart at 1.75 metres centres or less. Ideally, the at least one strongback comprises a plurality of strongbacks, wherein each strongback is spaced apart at 1.75 metres centres or 1.5 metres centres. Ideally, the floor panel is prefabricated off-site. The prefabricated floor panel comprises the plurality of joists. That is, the prefabricated floor panel may be preassembled in the offsite location to have the plurality of joists. The prefabricated floor panel comprises the floor panel decking. That is, the prefabricated floor panel may be preassembled in the offsite location to have the floor panel decking. The prefabricated floor panel may be preassembled with the insulating material located therein. That is, the prefabricated floor panel may be preassembled in the offsite location to have the insulating material located therein. The prefabricated floor panel may be preassembled in the off-site location with the fire-resistant layer being fixed to the floor panel using a means for fixing the fire-resistant layer to the floor panel. That is, the prefabricated floor panel may be preassembled in the offsite location to have the fire-resistant layer being fixed to the floor panel using a means for fixing the fire-resistant layer to the floor panel. The prefabricated floor panel may be preassembled in the off-site location with the sound-absorbing layer adhered thereon (e.g. using adhesive). That is, the prefabricated floor panel may be preassembled in the offsite location to have the sound-absorbing layer adhered thereon (e.g. using adhesive). The prefabricated floor panel may be preassembled in the off-site location with the at least one bracing members. That is, the prefabricated floor panel may be preassembled in the offsite location to have the at least one bracing members. According to another aspect of the present invention, there is provided a building system for constructing at least part of a building, wherein the building system comprises a flooring system. It will be appreciated by the reader that the flooring system and building may comprise any of the preferable, advantageous or optional features, components, arrangements or details as described in relation to any flooring system and building disclosed in any preceding aspect of the invention, and vice versa. Ideally, the at least part of a building comprises a first unit and a second unit. Ideally, the at least part of a building comprises at least part of a first unit and at least part of a second unit. Ideally, the second unit is situated above the first unit. Ideally, the second unit is situated above and on top of the first unit. Ideally, the second unit is situated vertically above and on top of the first unit. Preferably, the first unit and second unit are stackable. Ideally, the second unit is stacked on top of the first unit. Ideally, the first unit is a first fire compartment, and the second unit is a second fire compartment. Ideally, the first unit is a first dwelling, and the second unit is a second dwelling. Ideally, the first dwelling may be referred to as a first dwelling unit, and the second unit may be referred to as a second dwelling unit. Preferably, the first unit is a first commercial unit, and the second unit is a second commercial unit. Preferably, the flooring system is configured to separate the first unit and the second unit. Ideally, the flooring system is configured to act as a fire barrier between the first unit and the second unit. Ideally, the building system comprises a plurality of building components configured to form part of the walls of the first unit. Ideally, the first unit comprises a plurality of building components configured to form part of the walls of the first unit. Ideally, the plurality of building components of the first unit comprising a plurality of prefabricated building components. Ideally, the plurality of building components of the first unit comprising a plurality of partially prefabricated building components. Ideally, the plurality of building components of the first unit comprising a plurality of wall panels. Ideally, the plurality of building components of the first unit comprising a plurality of prefabricated wall panels. In some embodiments, the plurality of prefabricated wall panels of the first unit being deliverable as flat-packed panels for subsequent erection on-site. In some embodiments, the plurality of prefabricated wall panels of the first unit being deliverable as preassembled modules for subsequent erection on-site. Ideally, the building system comprises a plurality of building components configured to form part of the walls of the second unit. Ideally, the second unit comprises a plurality of building components configured to form part of the walls of the second unit. Ideally, the plurality of building components of the second unit comprising a plurality of prefabricated building components. Ideally, the plurality of building components of the second unit comprising a plurality of partially prefabricated building components. Ideally, the plurality of building components of the second unit comprising a plurality of wall panels. Ideally, the plurality of building components of the second unit comprising a plurality of prefabricated wall panels. In some embodiments, the plurality of prefabricated wall panels of the second unit being deliverable as flat-packed panels for subsequent erection on-site. In some embodiments, the plurality of prefabricated wall panels of the second unit being deliverable as preassembled modules for subsequent erection on-site. In some embodiments, the plurality of prefabricated wall panels of the second unit being deliverable as flat-packed panels for subsequent erection on-site to form the walls of the second unit. In some embodiments, the plurality of prefabricated wall panels of the second unit being deliverable as preassembled modules for subsequent erection on-site to form the walls of the second unit. Ideally, the flooring system is interposed between the first unit and the second unit. Ideally, the flooring system is interposed between the plurality of building components of the first unit and the plurality of building components of the second unit. Ideally, the flooring system is supported on the wall or walls of the building. Ideally, the flooring system is arrangeable to be top hung. Ideally, the one or more floor panels of the flooring system is arrangeable to be top hung. Ideally, the one or more floor panels of the flooring system is arrangeable to be top hung. Ideally, at least one floor panel of the one or more floor panels of the flooring system is arrangeable to be top hung. Ideally, the flooring system is arrangeable to be top hung on the wall or walls of the building. Ideally, the flooring system is arrangeable to be top hung on the cavity wall or walls of the building. Ideally, the flooring system is arrangeable to be top hung on the on the inner leaf of the cavity wall of walls of the building Ideally, the one or more floor panels of the flooring system is arrangeable to be top hung on the wall or walls of the building. Ideally, the one or more floor panels of the flooring system is arrangeable to be top hung on the cavity wall or walls of the building. Ideally, the one or more floor panels of the flooring system is arrangeable to be top hung on the on the inner leaf of the cavity wall of walls of the building. Ideally, at least one floor panel of the one or more floor panels of the flooring system is arrangeable to be top hung on the wall or walls of the building. Ideally, at least one floor panel of the one or more floor panels of the flooring system is arrangeable to be top hung on the cavity wall or walls of the building. Ideally, at least one floor panel of the one or more floor panels of the flooring system is arrangeable to be top hung on the on the inner leaf of the cavity wall of walls of the building. Ideally, the flooring system is top hung on the wall or walls of the building. Ideally, the flooring system is top hung on the cavity wall or walls of the building. Preferably, the flooring system is top hung on the inner leaf of the cavity wall of walls of the building. Ideally, the flooring system is supportable on at least one building component of the plurality of building components of the first unit. Ideally, the flooring system is supported on at least one building component of the plurality of building components of the first unit. Ideally, the flooring system is supported on at least one wall panel of the plurality of wall panels of the first unit. Ideally, at least one wall panel of the plurality of wall panels of the second unit are mounted on the flooring system. Ideally, the one or more floor panels of the flooring system is arrangeable to be top hung on at least one wall panel of the plurality of wall panels of the first unit. Ideally, the one or more floor panels of the flooring system is top hung on at least one wall panel of the plurality of wall panels of the first unit. Ideally, at least one floor panel of the one or more floor panels of the flooring system is arrangeable to be top hung on at least one wall panel of the plurality of wall panels of the first unit. Ideally, at least one floor panel of the one or more floor panels of the flooring system is top hung on at least one wall panel of the plurality of wall panels of the first unit. Ideally, the flooring system is top hung on at least one wall panel of the plurality of wall panels of the first unit. Ideally, at least one wall panel of the plurality of wall panels of the first unit forms a part of a cavity wall. Ideally, at least one wall panel of the plurality of wall panels of the first unit forms a part of an external wall of the first unit. Ideally, at least one wall panel of the plurality of wall panels of the first unit forms a part of an internal wall of the first unit. Ideally, at least one wall panel of the plurality of wall panels of the first unit forms a part of an external wall of the second unit. Ideally, at least one wall panel of the plurality of wall panels of the first unit forms a part of an internal wall of the second unit. Ideally, at least one wall panel of the plurality of wall panels of the second unit forms a part of a cavity wall. Ideally, at least one wall panel of the plurality of wall panels of the first unit forms a part of the inner leaf of a cavity wall. Ideally, at least one wall panel of the plurality of wall panels of the second unit forms a part of the inner leaf of a cavity wall. Ideally, the flooring system is arrangeable to be top hung on the at least one wall panel of the plurality of wall panels of the first unit forming a part of a cavity wall. Ideally, the flooring system is top hung on the at least one wall panel of the plurality of wall panels of the first unit forming a part of a cavity wall. Ideally, the flooring system is top hung on the at least one wall panel of the plurality of wall panels of the first unit forming the inner leaf of a cavity wall. Ideally, the plurality of wall panels of the first unit are timber framed. Preferably, the plurality of wall panels of the second unit are timber framed. Ideally, the plurality of building components of the first unit are configured to act as fire barriers to prevent or slow the spread fire from one unit to another unit or units of building. Ideally, the plurality of building components of the second unit are configured to act as fire barriers to prevent or slow the spread fire from one unit to another unit or units of building. Ideally, the plurality of wall panels of the first unit are configured to act as fire barriers to prevent or slow the spread fire from one unit to another unit or units of building. Ideally, the plurality of wall panels of the second unit are configured to act as fire barriers to prevent or slow the spread fire from one unit to another unit or units of building. Ideally, the first unit comprises a first shutter means. The first shutter means may also be referred to as the first unit shutter means. Ideally, the second unit comprises a second shutter means. The second shutter means may also be referred to as the second unit shutter means. Preferably, the first shutter means is fixable to the plurality of building components of the first unit and / or is formable from a part of at least one, or each, building component of the plurality of building components of the first unit. Preferably, the second shutter means is fixable to the plurality of building components of the second unit and / or is formable from a part of at least one, or each, building component of the plurality of building components of the second unit. Preferably, the first shutter means comprises a batten that is fixable to a base of the plurality of building components of the first unit and / or comprises the base of the plurality of building components of the first unit. Ideally, the base of the plurality of building components of the first unit comprises a wall sole plate, preferably at least two wall sole plates. Preferably, the screed layer of the flooring system is decoupled from the plurality of building components of the second unit by usage of a resilient edge strip. Preferably, the second shutter means comprises a batten that is fixable to a base of the plurality of building components of the second unit and / or comprises the base of the plurality of building components of the second unit. Ideally, the base of the plurality of building components of the second unit comprises a wall sole plate, preferably at least two wall sole plates. Ideally, the shutter means comprises a batten and / or the base of the plurality of building components, and in particular, the wall sole plate(s). Preferably the first unit and / or second unit shutter means has a depth of at least 38 mm. Advantageously, this enables an operator to easily pour the liquid screed to a desired depth of at least 35 mm. In some arrangements, the first unit and / or second unit shutter means is configured for the shuttering of a pourable screed layer that is poured to a depth of 50 mm. In these arrangements, the shutter means may comprise, for example, a batten and the two wall sole plates. Ideally, each wall panel of the plurality of wall panels of the first unit comprises a shutter means component. Ideally, each wall panel of the plurality of wall panels of the second unit comprises a shutter means component. The shutter means component may comprise the base of the wall panel and / or a batten. The shutter means component may comprise the wall sole plate(s) of the wall panel and / or a batten. Ideally, each shutter means component may be arrangeable, in use, to provide support and stability to a pourable screed layer that is poured to a depth of 35 mm. Each wall panel of the plurality of wall panels may be prefabricated with the shutter means component such that the shutter means component forms a part of the prefabricated wall panel. Each wall panel of the plurality of wall panels may be prefabricated with the shutter means component such that the shutter means component forms as an integral part of the prefabricated wall panel. Each wall panel of the plurality of wall panels may be prefabricated with the shutter means component such that the shutter means component forms a part of the prefabricated wall panel, said shutter means component being arrangeable, in use, to provide support and stability to a pourable screed layer that is poured to a depth of 35 mm. In arrangements where a wall panel is an external wall panel, the shutter means component may comprise the base of the wall panel (e.g. the wall sole plate(s)) and / or a batten fixed to the wall panel. In arrangements where a wall panel is an external wall panel, the shutter means component may comprise the base of the wall panel (e.g. the wall sole plate(s)) and / or a batten fixed to the base of the wall panel. In arrangements where a wall panel is an internal wall panel, the shutter means component may comprise the base of the wall panel (e.g. the wall sole plate(s)). Ideally, each wall panel of the plurality of wall panels of the first unit comprises an airtight membrane. Ideally, the airtight membrane of each wall panel of the plurality of wall panels is configured to lap around at least part of the flooring system to form an airtight seal. Ideally, each wall panel of the plurality of wall panels of the second unit comprises an airtight membrane. According to another aspect of the present invention, there is provided a building, said building comprising a flooring system. It will be appreciated that the building and the flooring system of the building may comprise any of the preferable, advantageous or optional features, components, arrangements or details as described in relation to any flooring system or building in any preceding aspect of the invention, and vice versa. In some embodiments, the building comprises a cavity wall. In some embodiments, the building comprises a compartmental wall. Ideally, the building comprises a cavity barrier located between the inner leaf and outer leaf of the cavity wall. Ideally, the inner leaf of the cavity wall comprises a plurality of wall panels. In some embodiments, the plurality of wall panels being a plurality of timber framed wall panels. In some embodiments, the plurality of wall panels being a plurality of light gauge steel framed panels. Ideally, the building is a multi-storey building. Ideally, the building houses a plurality of dwellings therein. Ideally, the building houses a plurality of dwellings therein, wherein at least two dwellings of the plurality of dwellings are vertically stacked within the building. According to another aspect of the present invention, there is provided a building, said building comprising a building system for constructing at least part of the building. It will be appreciated that the building and the building system for constructing at least part of the building may comprise any of the preferable, advantageous or optional features, components, arrangements or details as disclosed in relation to any building or building system for constructing at least part of the building in any preceding aspect of the invention, and vice versa. According to another aspect of the present invention, there is provided a method of installing a flooring system for a building. It will be appreciated that the building and the flooring system may comprise any of the preferable, advantageous or optional features, components, arrangements or details as disclosed in relation to any building or flooring system in any preceding aspect of the invention, and vice versa. Ideally, the method of installing a flooring system for a building comprises a step of installing one or more floor panels within the building to form part of a floor of the building. Ideally, the method of installing a flooring system for a building comprises a step of installing a sound-absorbing layer on top of the one or more floor panels. Ideally, the method of installing a flooring system for a building comprises a step of installing a screed layer on top of the sound-absorbing layer. Ideally, the step of installing one or more floor panels within a building comprises lifting and positioning the one or more floor panels on at least one wall of the building. Ideally, the step of installing one or more floor panels within a building comprises lifting and positioning the one or more floor panels on at least one wall of the building, such that at least one or each floor panel of the one or more floor panels is top hung from the at least one wall of the building. Ideally, the step of installing the sound-absorbing layer comprises laying the soundabsorbing layer on top of the one or more floor panels. Ideally, the step of installing a screed layer on top of the sound-absorbing layer comprises pouring screed on top of the sound-absorbing layer, such that the screed forms the screed layer. Ideally, the method comprises a step of prefabricating the one or more floor panels in an off-site location. Ideally, the method comprises a step of delivering the one or more floor panels to an on-site location. Ideally, the method comprises a step of installing a suspended ceiling assembly. Ideally, the step of installing the suspended ceiling assembly comprises fixing the suspended ceiling assembly to the one or more floor panels. In some embodiments, the step of installing the suspended ceiling assembly comprises fixing the suspended ceiling assembly to the one or more floor panels subsequent to the installation of the one or more floor panels. In other embodiments, the step of the installing the suspended ceiling assembly comprises fixing at least part of the suspended ceiling assembly to the one or floor panels prior to installation of the one or more floor panels. Ideally, the method comprises a step of fixing a fire-resistant layer to the one or more floor panels. Ideally, the method comprises a step of fixing the fire-resistant layer to the underside of the one or floor panels. In some embodiments, the method comprises a step of fixing a fire-resistant layer to the underside of the one or more floor panels subsequent to installation of the one or more floor panels. In other embodiments, the method comprises a step of fixing a fire-resistant layer to the underside of the one or more floor panels prior to installation of the one or more floor panels. By prior to installation, it will be understood that this includes fixing the fire-resistant layer to the underside of the one or more floor panels at an off-site location e.g. a factory. Ideally, the method comprises a step of fixing a fire-resistant layer to the underside of the one or more floor panels using at least one resilient bar, said resilient bar being interposed between the one or more floor panels and the fire-resistant layer. In some embodiments, the method comprises a step of fixing a fire-resistant layer to the underside of the one or more floor panels using at least one resilient bar subsequent to installation of the one or more floor panels, said resilient bar being interposed between the one or more floor panels and the fire-resistant layer. In other embodiments, the method comprises a step of fixing a fire-resistant layer to the underside of the one or more floor panels using at least one resilient bar prior to installation of the one or more floor panels, said resilient bar being interposed between the one or more floor panels and the fire-resistant layer. Ideally, the method comprises a step of fixing a ceiling layer to the fire-resistant layer by using a bracket assembly. According to another aspect of the present invention, there is provided a method of constructing at least part of a building using a building system. It will be appreciated that the method of constructing at least part of a building using a building system may comprise any of the preferable, advantageous or optional features, components, arrangements, steps or details as disclosed in relation to any preceding aspect of the invention, including the building system and building, and vice versa. Ideally, the method of constructing at least part of a building using a building system comprises a step of assembling a first plurality of building components of a first unit of the building. Ideally, the method of constructing at least part of a building using a building system comprises a step of installing a flooring system, said flooring system separating a first unit from a second unit. Ideally, the method of constructing at least part of a building using a building system comprises a step of assembling a second plurality of building components of a second unit. Ideally, the step of assembling a first plurality of building components of a building comprises erecting the first plurality of building components of the first unit of the building. Ideally, the step of assembling a first plurality of building components of a building comprises erecting the first plurality of building components of the first unit of the building by lifting and positioning the building components of the building to form at least part of the wall of the building. Ideally, the step of assembling the second plurality of building components of the second unit comprises assembling said second plurality of building components on top of the one or floor panels. Ideally, the step of assembling the second plurality of building components of the second unit comprises assembling said second plurality of building components on top of the flooring system to form at least part of the wall or walls of the building. Ideally, the step of assembling the second plurality of building components of the second unit comprises erecting said second plurality of building components on top of the flooring system. Ideally, the step of assembling the second plurality of building components of the second unit comprises erecting said second plurality of building components on top of the flooring system to form at least part of the wall or walls of the building. Ideally, the step of installing a flooring system, said flooring system separating a first unit from a second unit, comprises a step of installing one or more floor panels within the building to form part of a floor of the building. Ideally, the method of constructing at least part of a building using a building system comprises a step of installing a sound-absorbing layer on top of the one or more floor panels. Ideally, the method of constructing at least part of a building using a building system comprises a step of installing a screed layer on top of the sound-absorbing layer. Ideally, the step of installing one or more floor panels within a building comprises lifting and positioning the one or more floor panels on at least one wall of the building. Ideally, the step of installing one or more floor panels within a building comprises lifting and positioning the one or more floor panels on at least one wall of the building, such that at least one or each floor panel of the one or more floor panels is top hung from the at least one wall of the building. Ideally, the step of installing one or more floor panels within a building comprises lifting and positioning the one or more floor panels onto the plurality of building components of the first unit, such that at least one or each floor panel of the one or more floor panels is top hung from the plurality of building components of the first unit. Ideally, the step of installing one or more floor panels within a building comprises lifting and positioning the one or more floor panels onto the plurality of building components of the first unit, such that at least one or each floor panel of the one or more floor panels is top hung on at least one rim board situated on top the plurality of building components of the first unit. Ideally, the step of installing the sound-absorbing layer comprises laying the soundabsorbing layer on top of the one or more floor panels. Ideally, the step of installing a screed layer on top of the sound-absorbing layer comprises pouring screed on top of the sound-absorbing layer, such that the screed forms the screed layer. Ideally, the method of constructing at least part of a building using a building system comprises a step of prefabricating the one or more floor panels in an off-site location. Ideally, the method of constructing at least part of a building using a building system comprises a step of delivering the one or more floor panels to an on-site location. Ideally, the method of constructing at least part of a building using a building system comprises a step of installing a suspended ceiling assembly. Ideally, the step of installing the suspended ceiling assembly comprises fixing the suspended ceiling assembly to the one or more floor panels. In some embodiments, the step of installing the suspended ceiling assembly comprises fixing the suspended ceiling assembly to the one or more floor panels subsequent to the installation of the one or more floor panels. In other embodiments, the step of the installing the suspended ceiling assembly comprises fixing at least part of the suspended ceiling assembly to the one or floor panels prior to installation of the one or more floor panels. Ideally, the method of constructing at least part of a building using a building system comprises a step of fixing a fire-resistant layer to the one or more floor panels. Ideally, the method of constructing at least part of a building using a building system comprises a step of fixing the fire-resistant layer to the underside of the one or floor panels. In some embodiments, the method of constructing at least part of a building using a building system comprises a step of fixing a fire-resistant layer to the underside of the one or more floor panels subsequent to installation of the one or more floor panels. In other embodiments, the method of constructing at least part of a building using a building system comprises a step of fixing a fire-resistant layer to the underside of the one or more floor panels prior to installation of the one or more floor panels. Ideally, the method of constructing at least part of a building using a building system comprises a step of fixing a fire-resistant layer to the underside of the one or more floor panels using at least one resilient bar, said resilient bar being interposed between the one or more floor panels and the fire-resistant layer. In some embodiments, the method of constructing at least part of a building using a building system comprises a step of fixing a fire-resistant layer to the underside of the one or more floor panels using at least one resilient bar subsequent to installation of the one or more floor panels, said resilient bar being interposed between the one or more floor panels and the fire-resistant layer. In other embodiments, the method of constructing at least part of a building using a building system comprises a step of fixing a fire-resistant layer to the underside of the one or more floor panels using at least one resilient bar prior to installation of the one or more floor panels, said resilient bar being interposed between the one or more floor panels and the fire-resistant layer. Ideally, the method of constructing at least part of a building using a building system comprises a step of fixing a ceiling layer to the fire-resistant layer by using a bracket assembly. In some embodiments, the first unit is a ground floor unit. By ground floor unit, we mean that the unit may be a ground floor dwelling. In other embodiments, the first unit is situated above a ground floor unit. According to another aspect of the present invention, there is provided a kit of parts for use in constructing at least part of one or more units of a building, the kit of parts comprising: one or more floor panels for forming at least part of a floor of at least one unit of the building; and a plurality of building components for forming part of the walls of at least one unit of the building. It will be appreciated that the building, one or more floor panels, and the plurality of building components of the kit of parts may comprise any of the preferable, advantageous or optional features, components, arrangements, steps or details as disclosed in relation to any preceding aspect of the invention and vice versa. Ideally, the, or each, floor panel of the one or more floor panels comprises a plurality of joists, wherein each joist of the plurality of joists comprises a top chord and a bottom chord, and wherein each joist of the plurality of joists comprises a webbing framework configured to interconnect the top chord and the bottom chord Ideally, the, or each, floor panel may be braced using at least one bracing member, wherein the at least one bracing member is at least one strongback. Ideally, the, or each, floor panel comprises a fire-resistant layer configured to prevent or slow the spreading of fire, the fire-resistant layer being fixed to the floor panel using a means for fixing the fire-resistant layer to the one or more floor panels. Ideally, the fire-resistant layer comprises two or more layers of fire-resistant boards. Ideally, the two or more layers of fire-resistant boards are two or more layers of imperforate fire-resistant boards. Ideally, each layer of fire-resistant board comprises at least one-fire resistant building board. Ideally, the at least one fire-resistant building board comprises a gypsum-based type F rated plasterboard. Ideally, the means for fixing the fire-resistant layer to the floor panel comprises a resilient bar. Ideally, the, or each, floor panel comprises an insulating material located in the floor panel. Ideally, the insulating material is a non-combustible insulating material. Ideally, the insulating material comprises mineral wool or rockwool or fibreglass. Ideally, the insulating material has a density between 10 and 45 kg / m3. Ideally, the webbing framework has an open-web configuration. Ideally, the webbing framework is a metallic webbing framework. Ideally, at least one floor panel of the one or more floor panels of the flooring system is arrangeable to be top hung Ideally, the at least one strongback comprises a plurality of strongbacks, wherein each strongback is spaced apart at 1.75 metres or less. Ideally, the at least one strongback comprises a plurality of strongbacks, wherein each strongback is spaced apart at 1.75 metres centres or 1.5 metres centres. Ideally, the, or each, floor panel is prefabricated off-site. Ideally, each prefabricated floor panel of the one or more prefabricated floor panels comprises the plurality of joists. That is, each prefabricated floor panel may be preassembled in the offsite location to have a respective plurality of joists. Ideally, each prefabricated floor panel of the one or more prefabricated floor panels comprises the floor panel decking. That is, each prefabricated floor panel may be preassembled in the offsite location to a respective floor panel decking. Ideally, each prefabricated floor panel of the one or more prefabricated floor panels may be preassembled with the insulating material located therein. That is, each prefabricated floor panel may be preassembled in the offsite location to have a respective insulating material located therein. Ideally, each prefabricated floor panel of the one or more prefabricated floor panels may be preassembled in the off-site location with the fire-resistant layer being fixed to the floor panel using a means for fixing the fire-resistant layer to the one or more floor panels. That is, each prefabricated floor panel may be preassembled in the offsite location to have a respective fire-resistant layer being fixed to the floor panel using a means for fixing the fire-resistant layer to the one or more floor panels. Ideally, each prefabricated floor panel of the one or more prefabricated floor panels may be preassembled in the off-site location with the sound-absorbing layer adhered thereon (e.g. using adhesive). That is, each prefabricated floor panel may be preassembled in the offsite location to have the sound-absorbing layer adhered thereon (e.g. using adhesive). Ideally, each prefabricated floor panel of the one or more prefabricated floor panels may be preassembled in the off-site location with the at least one bracing members. That is, each prefabricated floor panel may be preassembled in the offsite location to have a respective at least one bracing members. Ideally, the plurality of building components comprising a plurality of prefabricated wall panels. In some embodiments, the plurality of prefabricated wall panels of the unit being deliverable as flat-packed panels for subsequent erection on-site. In some embodiments, the plurality of prefabricated wall panels of the unit being deliverable as preassembled modules for subsequent erection on-site. Ideally, the plurality of wall panels is timber framed. Ideally, at least one unit, or each unit of the one or more units of the building comprises a shutter means. Ideally, the shutter means comprises a batten and / or the base of the plurality of building components, and in particular, the wall sole plate(s). Ideally, each wall panel of the plurality of wall panels comprises a shutter means component for forming at least part of the shutter means of a unit of the building. The shutter means component of each wall panel may comprise the base of the wall panel and / or a batten. The shutter means component of each wall panel may comprise the wall sole plate(s) of the wall panel and / or a batten. In use, the shutter means component of each wall panel may, in combination with the shutter means component of the other wall panel(s), collectively form a shutter means of a unit and is arranged to provide support and stability to screed poured on the one or more floor panels until the poured screed has set. Each wall panel of the plurality of wall panels may be prefabricated with the shutter means component such that the shutter means component forms a part of the prefabricated wall panel. That is, each wall panel of the plurality of wall panels may comprise an integrated shutter means component. The plurality of wall panels may comprise at least one external wall panel. The plurality of wall panels may comprise at least one internal wall panel. In arrangements where a wall panel of the plurality of wall panels is an external wall panel, the shutter means component may comprise the base of the wall panel (e.g. the wall sole plate(s)) and / or a batten fixed to the wall panel. In arrangements where a wall panel is an external wall panel, the shutter means component may comprise the base of the wall panel (e.g. the wall sole plate(s)) and / or a batten fixed to the base of the wall panel. In arrangements where a wall panel is an internal wall panel, the shutter means component may comprise the base of the wall panel (e.g. the wall sole plate(s)). Ideally, each wall panel of the plurality of wall panels of the first unit comprises an airtight membrane. Ideally, the airtight membrane of each wall panel of the plurality of wall panels is configured to lap around at least part of the flooring system to form an airtight seal. Ideally, each wall panel of the plurality of wall panels of the second unit comprises an airtight membrane. According to another aspect of the invention there is provided a method of prefabricating a floor panel for use in a flooring system. It will be appreciated that the floor panel may comprise any of the preferable, advantageous or optional features, components, arrangements, steps or details as disclosed in relation to the floor panel of any preceding aspect of the invention and vice versa. The method comprises assembling a plurality of joists of the floor panel. The method of prefabricating a floor panel comprises assembling a floor panel decking on the plurality of joists. The method of prefabricating a floor panel may comprise inserting an insulating material into the floor panel. The method of prefabricating a floor panel may comprise fixing a fire-resistant layer to the floor panel using a means for fixing the fire-resistant layer to the one or more floor panels. The method may comprise assembling a sound-absorbing layer onto the floor panel. Assembling the sound-absorbing layer onto the floor panel may comprise adhering the soundabsorbing layer to the floor panel. The method may comprise bracing the floor panel using at least one bracing member, preferably a plurality of bracing members. The plurality of bracing members comprising a plurality of strongbacks, preferably spaced at 1.75 m centres or less within the floor panel. The method may comprise weatherproofing the floor panel. Weatherproofing the floor panel may comprise wrapping the floor panel using a weatherproofing member (e.g. a weatherproofing membrane and / or a weatherproofing board). BRIEF DESCRIPTION OF DRAWINGS Examples of the present invention will now be described with reference to the accompanying drawings, in which:- Figure 1 is a partial cross-section view of an example of the building system for constructing at least part of a building, wherein the flooring system is also shown. DETAILED DESCRIPTION The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness. The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the invention is provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents. It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. In Figure 1 there is shown a non-limiting example of a building system, generally indicated by reference numeral 1, for constructing at least part of a building 2. The building system 1 comprises a flooring system 100. The flooring system 100 has one or more floor panels 101 (one shown). The flooring system 100 has a sound-absorbing layer 102. The flooring system has a screed layer 103. The flooring system 100 is configured to separate units within the building 2, and in particular two units 104a, 104b within the building 2. The flooring system 100 is configured to separate dwellings 104a, 104b within the building 2, and in particular two dwellings 104a, 104b within the building 2. The at least part of a building 2 in the non-limiting example shown in Figure 1 of has a first unit 104a and a second unit 104b. The second unit 104b is situated above the first unit 104a. The second unit 104b is situated above and on top of the first unit 104a. The second unit 104b is situated vertically above and on top of the first unit 104a. The second unit 104b is stacked on top of the first unit 104a. The first unit 104a is a first fire compartment 104a, and the second unit 104b is a second fire compartment 104b. In preferred non-limiting examples, the first unit 104a is a first dwelling 104a, and the second unit 104b is a second dwelling 104b. In other non-limiting examples, the first unit 104a may be a first commercial unit 104a, and the second unit 104b may be a second commercial unit 104b. The flooring system 100 is configured to separate the first unit 104a and the second unit 104b. The flooring system 100 is configured to act as a fire barrier between the first unit 104a and the second unit 104b. The first unit 104a has a plurality of building components (one shown) 105 configured to form part of the walls 106 of the first unit 104a. The plurality of building components 105 of the first unit 104a being a plurality of prefabricated building components 104a. The plurality of building components 105 of the first unit 104a being a plurality of wall panels 105. The plurality of building components 105 of the first unit 104a being a plurality of prefabricated wall panels 105. In some non-limiting examples, the plurality of prefabricated wall panels 105 of the first unit 104a are delivered as flat-packed panels for subsequent erection on-site. In other non-limiting examples, the plurality of prefabricated wall panels 105 of the first unit 104a being delivered as preassembled modules for subsequent erection on-site. The second unit 104b has a plurality of building components (one shown) 107 configured to form part of the walls 108 of the second unit 104b. The plurality of building components 107 of the second unit 104b being a plurality of prefabricated building components 107. The plurality of building components 107 of the second unit being a plurality of wall panels 107. The plurality of building components 107 of the second unit 104b being a plurality of prefabricated wall panels 107. In some non-limiting examples, the plurality of prefabricated wall panels 107 of the second unit 104b are delivered as flat-packed panels for subsequent erection on-site. In other non-limiting examples, the plurality of prefabricated wall panels 107 of the second unit 104b are delivered as preassembled modules for subsequent erection on-site. The flooring system 100 is interposed between the first unit 104a and the second unit 104b. The flooring system 100 is interposed between the plurality of building components 105 of the first unit 104a and the plurality of building components 107 of the second unit 104b. The flooring system 100 may be supported on the wall or walls of the building 2. The flooring system 100 may be arranged to be top hung. The one or more floor panels 101 of the flooring system is arranged to be top hung. At least one floor panel 101 of the one or more floor panels 101 of the flooring system 100 is arranged to be top hung. The flooring system 100 is arranged to be top hung on the wall or walls of the building 2. The flooring system 100 may be arranged to be top hung on the cavity wall or walls of the building 2. The flooring system 100 may be arranged to be top hung on the on the inner leaf of the cavity wall of walls of the building 2. The one or more floor panels 101 of the flooring system 100 is arranged to be top hung on the wall or walls of the building 2. The one or more floor panels 101 of the flooring system 100 is arranged to be top hung on the cavity wall or walls of the building. The one or more floor panels 101 of the flooring system 101 is arranged to be top hung on the on the inner leaf of the cavity wall of walls of the building 2. At least one floor panel 101 of the one or more floor panels 101 of the flooring system 100 is arranged to be top hung on the wall or walls of the building. At least one floor panel 101 of the one or more floor panels 101 of the flooring system 100 is arranged to be top hung on the cavity wall or walls of the building 2. At least one floor panel 101 of the one or more floor panels 101 of the flooring system 100 is arranged to be top hung on the on the inner leaf of the cavity wall of walls of the building 2. The flooring system 100 is supported on at least one building component 105 of the plurality of building components 105 of the first unit 104a.. The flooring system is supported on at least one wall panel 105 of the plurality of wall panels 105 of the first unit 104a. At least one wall panel 107 of the plurality of wall panels 107 of the second unit 104b are mounted on the flooring system 100. At least one floor panel 101 of the one or more floor panels 101 of the flooring system 100 may be arranged to be top hung on at least one wall panel 105 of the plurality of wall panels 105 of the first unit 104a. In the non-limiting example shown, at least one wall panel 105 of the plurality of wall panels 105 of the first unit 104a forms a part of a cavity wall, and in particular a part of the inner leaf of the cavity wall. In the non-limiting example shown the at least one wall panel 107 of the plurality of wall panels 107 of the second unit 104b forms a part of a cavity wall, and in particular a part of the inner leaf of the cavity wall. In non-limiting examples, the plurality of wall panels 105, 107 of the first unit 104a and second unit 104b are timber framed. The plurality of building components 105 of the first unit 104a are configured to act as fire barriers to prevent or slow the spread fire from one unit to another unit or units of the building 2. The plurality of building components 107 of the second unit 104b are configured to act as fire barriers to prevent or slow the spread fire from one unit to another unit or units of the building 2. The plurality of wall panels 105 of the first unit 104a are configured to act as fire barriers to prevent or slow the spread fire from one unit to another unit or units of the building 2. The plurality of wall panels 107 of the second unit 104b are configured to act as fire barriers to prevent or slow the spread fire from one unit to another unit or units of building 2. The first unit 104a may have a first shutter (not shown). The second unit 104b may have a second shutter 108. The first shutter is fixed to the plurality of building components 105 of the first unit 104a . The second shutter 108 is fixed to the plurality of building components 107 of the second unit 104b . The first shutter is fixed to a base (not shown) of the plurality of building components 105 of the first unit 104a . The base of the plurality of building components 105 of the first unit 104a is two wall sole plates (not shown). The second shutter 108 is fixed to a base 109 of the plurality of building components 107 of the second unit 104b . The base 109 of the plurality of building components 107 of the second unit 104b comprises two wall sole plates 109. The first shutter and second shutter 108 are both battens 108. The first shutter and second shutter can also include, either in addition to the batten, or as an alternative to the batten, the wall sole plates, The first shutter and second shutter 108 each have a depth of at least 38 mm. In use, this enables an operator to easily pour the liquid screed to a desired depth of at least 35 mm. Each wall panel 105 of the plurality of wall panels 105 of the first unit 104a has an airtight membrane 110. The airtight membrane 110 of each wall panel 105 of the plurality of wall panels 105 is configured to lap around at least part of the flooring system 100 to form an airtight seal. The flooring system 100 is configured to form part of a fire compartment of a unit of a building 2. The flooring system 100 is configured to act as a fire barrier between units of a buildingl04a, 104b, said units 104a, 104b being separated by the flooring system 100. The discrete fire compartments 104a, 104b are stacked vertically within the building 2. The flooring system 100 is configured to prevent or slow the spreading of fire between dwellings within a building. The flooring system 100 is configured to prevent or slow the spread of fire from one unit to another unit or units within the building 2. The flooring system 100 is configured to act as a fire barrier between dwellings, said dwellings being separated by the flooring system 100. The flooring system 100 is configured to resist fire for at least 60 minutes. The flooring system 100 is configured to inhibit the transmission of sound. By sound, we main airborne sound and / or impact sound. The flooring system 100 is configured to inhibit the transmission of sound between units within the building 2. The flooring system is configured to inhibit the transmission of sound between two units, e.g. units 104a, 104b, within the building 2. The flooring system 100 is configured to inhibit the transmission of sound between dwellings within the building. The flooring system is configured to inhibit the transmission of sound between two dwellings within the building, see for example unis 104a, 104b. The flooring system 100 is configured to inhibit the transmission of sound between two units 104a, 104b within the building 2, said flooring system 100 separating said two units 104a, 104b within the building. At least one floor panel 101 of the one or more floor panels 101 is prefabricated, and in particular, prefabricated off-site. At least one floor panel 101 of the one or more floor panels 101 has a floor panel decking 111. The floor panel decking 111 has a minimum depth of at least 18 mm. In the non-limiting example shown, the flooring system 100 has at least one rim board 112, in particular two rim boards 112a, 112b. At least one floor panel 101 of the one or more floor panels 101 has an insulating material 113. The insulating material 113 is a noncombustible insulating material 113. The insulating material 113 is located within at least one floor panel 101 of the one or more floor panels 101. The insulating material 113 comprises a depth of at least 100 mm. The insulating material 113 is configured to inhibit the transmission of sound between units within the building 2. The insulating material is configured to inhibit the transmission of sound between two units, for example units 104a, 104b, within the building 2. The insulating material 113 is configured to inhibit the transmission of sound between dwellings within a building 2. The insulating material 113 is configured to inhibit the transmission of sound between two dwellings, see for example units 104a, 104b within a building 2. The insulating material 113 is configured to inhibit the transmission of sound between two units 104a, 104b within the building 2, said flooring system 100 separating said two units 104a, 104b within the building 2. The insulating material 113 has a density of at least 10 kg / m3, and in particular has a density between 10 and 45 kg / m3. The insulating material 113 is configured to absorb transmitted sound. The flooring system 100 is configured to inhibit the transmission of sound between two dwellings 104a, 104b within the building 2, said flooring system 100 separating said two dwellings 104a, 104b within the building 2. The or each floor panel 101 of the one or more floor panels 101 has a plurality of joists (one shown) 114. Each joist 114 of the plurality of joists 114 has a depth of at least 225 mm. In preferred non-limiting examples, at least part of the plurality of joists 114 is formed from wood. In other non-limiting examples, the plurality of joists 114 is wholly formed from wood or metal. Each joist 114 of the plurality of joists 114 may be spaced apart from an adjacent joist 114 to form a series of cavities therebetween (not shown) and most preferably in a parallel orientation. Beneficially, this allows the insulating material 113 to be inserted into the cavities formed between the plurality of joists 114. Each joist 114 of the plurality of joists 114 has a top chord 115 and bottom chord. In preferred examples, the top chord 115 and the bottom chord 116 are formed from wood. Each joist 114 of the plurality of joists 114 has a webbing framework 117 configured to interconnect the top chord 115 and the bottom chord 116. Each top chord 115 and bottom chord 116 being spaced apart from each other to form a cavity 118 between said top chord 115 and said bottom chord 116. The webbing framework 117 has an open-web configuration. Therefore, the or each floor panel 101 of the one or more panels 101 may be described as having an open-web configuration. In use, the open web configuration facilitates the fixing of lifting straps used for offloading the one or more floor panels 101 from a lorry that has delivered said one or more floor panels 101 from a factory and / or for lifting and positioning the one or more floor panels 101 on-site. In use, the open-web configuration of the or each floor panel 101 of the one or more floor panels 101 enables the or each floor panel 101 of the one or more floor panels 101 to be braced using at least one bracing member (not shown) configured to extend transversely to the direction of the plurality of joists 114 and between the open-webbing of the plurality of joists 114. In use, the open-web configuration of the or each floor panel 101 of the one or more floor panels 101 enables the insulating material 113 to be laid as a continuous layer of insulating material 113 across the flooring system 100, thereby reducing thermal bridging and improving the thermal efficiency of the flooring system 100. The at least one bracing member is at least one strongback. The or each strongback may brace more than one floor panel 101. At least one floor panel 101 of the one or more floor panels 101 is configured to inhibit the transmission of vibrations between dwellings, wherein the flooring system 100 separates said dwellings. At least one floor panel 101 of the one or more floor panels 101 is configured to be stiffened. At least one floor panel 101 of the one or more floor panels 101 is stiffened. The one or more floor panels 101 is configured to inhibit the transmission of airborne sound and / or impact sound. At least one floor panel 101 of the one or more floor panels 101 is configured to inhibit the transmission of airborne sound and / or impact sound. The or each floor panel 101 of the one or more floor panels 101 is stiffened to inhibit the transmission of vibrations between units, said units separated by the flooring system 100. In non-limiting examples, where more than one bracing member is used, each bracing member used to brace a floor panel is spaced apart at 1.75m centres or less (e.g. 1.5m or 1.75m). Beneficially, this stiffens the or each floor panel 101 of the one or more floor panels 101 and inhibits the transmission of structure-borne sound from one unit to another unit or units within the building 2. The flooring system 100 may be configured to be top hung. In use, in a top-hung configuration, the flooring system 100 is configured to inhibit transmission of sound transmitted by flanking, and more specifically, the flooring system 100 is configured to inhibit transmission of sound transmitted by flanking from unit to another unit or units within the building 2. The flooring system 100 may be configured to be top hung from a wall of the building 2. In use, the top hung configuration of the flooring system 100 reduces thermal bridging at the wall-floor interface. In the non-limiting example shown, the one or more floor panels 101 is configured to be top hung. The one or more floor panels 101 is configured to be top hung on the wall of the building 2. The one or more floor panels 101 is configured to be top hung on the cavity wall of the building 2. At least one floor panel 101 of the one or more floor panels 101 is configured to be top hung on the cavity wall of a building 2. The or each floor panel 101 of the one or more floor panels 101 may be configured to be top hung on the cavity wall of a building 2. The one or more floor panels 101 may be configured to be top hung on the inner leaf of the cavity wall of a building 2. At least one floor panel 101 of the one or more floor panels 101 is configured to be top hung on the inner leaf of the cavity wall of a building 2. The or each floor panel 101 of the one or more floor panels 101 is configured to be top hung on the inner leaf of the cavity wall of a building 2. The one or more floor panels 101 is configured to be supported on an inner leaf of the cavity wall. At least one floor panel 101 of the one or more floor panels 101 is configured to be supported on an inner leaf of the cavity wall. The or each floor panel 101 of the one or more floor panels 101 is configured to be supported on an inner leaf of the cavity wall. In non-limiting examples of the invention, at least one floor panel 101 of the one or more floor panels 101 has a projecting portion 119. The projecting portion 119 projects from at least part of one edge portion of the at least one floor panel 101. The projecting portion 119 has an underside recess 120 extending along one edge portion of the panel 101. The projecting portion 120 has a flat underside surface 121 for engaging an upper surface 122 of a building component, and in particular the two rim boards 112a, 112b arranged beneath said projecting portion 119. The projecting portion 119 has a flat upper surface 123 for engaging a lower surface of a building component mounted thereon. The two rim boards 112a, 112b forms a part of the wall of the building 2. Other building components, such a wall panel arranged beneath the projecting portion and engaging the projecting portion, fall within the scope of the invention. The projecting portion 119 is a rectangular slab portion 119 formed for resting between the building component arranged beneath and the building component mounted there above. In the non-limiting example shown in Figure 1, wherein the one or more floor panels 101 is configured to be top hung, and wherein the flooring system 100 further comprises at least one rim board 112 engaging the flat underside surface 121 of the projecting portion 119, insulation 124 may be inserted in the underside recess 120 located between the at least one rim board 112 and the one or more floor panels 101. In use, this improves the thermal efficiency of the flooring system 100 and reduces thermal bridging. The building 2 is a multi-story building 2. The building 2 has two or more stories. The building 2 has a plurality of units. Each unit of the plurality of units is configured to be a fire compartment. At least two or more units of the plurality of units are stacked vertically within the building. In preferred non-limiting examples, each unit of the plurality of units is a dwelling. In other non-limiting examples, at least one unit of the plurality of units may be or have a commercial unit or healthcare unit for example. In the non-limiting example shown in Figure 1, the sound-absorbing layer 102 is an acoustic underlay 102. The sound-absorbing layer 102 is configured to inhibit the transmission of airborne sound and contributes to the overall sound insulation of the flooring system 100. The sound-absorbing layer 102 is configured to inhibit the transmission of impact sound and contributes to the overall sound insulation of the flooring system 100. The sound-absorbing layer 102 is configured to inhibit the transmission of airborne sound from one unit to another unit or units within a building 2. The sound-absorbing layer 102 is configured to inhibit the transmission of impact sound from one unit to another unit or units within a building 2. The sound-absorbing layer 102 is configured to inhibit the transmission of airborne sound between units separated by the flooring system 100. The sound-absorbing layer 102 is configured to inhibit the transmission of impact sound between units separated by the flooring system 100. The sound-absorbing layer 102 is vertically located above the one or more floor panels 101. The sound-absorbing layer 102 is located on the one or more floor panels 101. The soundabsorbing layer 102 is located beneath the screed layer 103. The sound-absorbing layer 102 is disposed between the one or more floor panels 101 and the screed layer 103. The soundabsorbing layer 102 is vertically located beneath the screed layer 103. The sound-absorbing layer 102 is configured to decouple the screed layer 103 from the one or more floor panels 101. By decouple, we mean to separate the screed layer 103 from the one or more floor panels 101 so that they are not in direct contact with each other. Beneficially, this configuration inhibits the transmission of airborne sound and impact sound from one unit to another unit or units within the building 2. The screed layer 103 is configured to inhibit the transmission of sound. The screed layer 103 contributes to the overall sound insulation of the flooring system 100. The screed layer 103 is configured to inhibit the transmission of sound between units within the building 2. The screed layer 103 is configured to inhibit the transmission of sound between units within a building 2, said units being vertically stacked. The screed layer 103 is configured to inhibit the transmission of sound between two units within the building 2. The screed layer 103 is configured to inhibit the transmission of sound between two units 104a, 104b separated by said flooring system 100 for the building 2. The screed layer 103 is formed by pouring of screed. The screed may be a pourable liquid screed. The screed layer 103 is formed by pouring. The screed layer 103 is poured on-site. By on-site, we mean at a building site wherein a building 2 is being constructed. The screed layer 103 is poured on top of the soundabsorbing layer 102 of the flooring system 100. The screed layer 103 is poured subsequent to installation of the sound-absorbing layer 102. The screed layer 103 has a minimum depth of 35 mm. In some non-limiting examples, the screed layer 103 has gypsum, and may be referred to as being gypsum based. The liquid screed has gypsum and may be referred to as being gypsum-based. In use, the gypsum-based screed sets more quickly in comparison to cement based screeds, thereby enabling workers to come on-site for further building works more quickly. In use, the gypsum-based screed is also configured to have minimal shrinkage and thus minimal cracking, thereby ensuring that the integrity of the screed layer 103 is maintained after drying. The flooring system 100 is configured to prevent or slow the spreading of fire from dwellings within a building 2 said dwellings being vertically stacked. The flooring system 100 is configured to prevent or slow the spreading of fire between dwellings separated by said flooring system 100. The flooring system 100 is configured to prevent or slow the spreading of fire between two dwellings 104a, 104b separated by said flooring system 100. The flooring system 100 has a fire-resistant layer 125. The fire-resistant layer 125 is configured to prevent or slow the spreading of fire. The fire-resistant layer 125 is configured to prevent or slow the spreading of fire from one dwelling to another dwelling or dwellings within a building. The fire-resistant layer 125 is configured to be an imperforate fire-resistant layer 125. In the non-limiting example shown in Figure 1, the fire-resistant layer 125 has two layers of fire-resistant board 126a, 126b. The two layers of fire-resistant boards 126a, 126b are two or more layers of imperforate fire-resistant boards 126a, 126b. Each layer of fire-resistant board 126a, 126b has at least one fire-resistant building board 127. The fire-resistant building board 127 is formed from plasterboard, and more specifically a gypsum-based type F rated plasterboard. The fire-resistant layer 125 is located beneath the one or more floor panels 101. The fire-resistant layer 125 is arranged beneath the one or more floor panels 101. The fire-resistant layer 125 is arranged beneath the underside of the one or more floor panels 101. The fire-resistant layer 125 is arranged beneath the bottom chords 116 of the one or more floor panels. The fire-resistant layer 125 is fixed to the one or more floor panels 101. The fire-resistant layer 125 is fixed to the underside of the one or more floor panels 101. The fire-resistant layer 125 is fixed to the bottom chord 116 of the one or more floor panels 101. The fire-resistant layer is fixed to the one or more floor panels using at least one resilient bar 128 (2 shown). The at least one resilient bar 128 contributes to the overall sound insulation of the flooring system 100. The at least one resilient bar 128 is configured to inhibit the transmission of sound between dwellings within a building 2. The at least one resilient bar 128 is configured to inhibit the transmission of sound between two dwellings within a building 2. The at least one resilient bar 128 is configured to inhibit the transmission of sound between two dwellings 104a, 104b within the building 2, said at least one resilient bar 128 located between said two dwellings 104a, 104b within the building 2. The at least one resilient bar 128 is configured to inhibit the transmission of structure-borne vibrations resulting from an impact on, or vibration against, the flooring system 100. The at least one resilient bar 128 is configured to mitigate the transmission of sound. In preferred non-limiting examples, the at least one resilient bar 128 is interposed between the one or more floor panels 101 and the fire-resistant layer 125. The at least one resilient bar 128 is configured to decouple the fire-resistant layer 125 from the one or more floor panels 101. By configured to decouple, we mean that to separate the fire-resistant layer 125 from the one or more floor panels 101 such that the fire-resistant layer 125 and the one or more floor panels 101 are not in direct contact with each other. In use, this reduces the surface area available for transmission of structure-borne sound from one unit to another unit or units within the building 2 The fire-resistant layer 125 is suspended from the one or more floor panels 101 via the at least one resilient bar 128. The flooring system 100 has a ceiling layer 129. The ceiling layer 129 is arranged beneath the one or more floor panels 101. The ceiling layer 129 is arranged beneath the fire-resistant layer 125. The ceiling layer 129 is arranged beneath and fixed to the fire-resistant layer 125 using a fixing arrangement 130. The flooring system 100 has a service layer 131. The service layer 131 being located between the ceiling layer 129 and fire-resistant layer 125. The service layer 131 being disposed between the ceiling layer 129 and fire-resistant layer 125. The service layer 131 is located between the ceiling layer 129 and fire-resistant layer 125. The service layer 131 accommodates technical services and equipment therefor. Technical services and / or equipment therefor is located within the service layer 131. The flooring system 100 has a fixing arrangement 130 for mounting the ceiling layer 129 to the fire-resistant layer 125. The ceiling layer 129 is mounted to the fire-resistant layer 125. The ceiling layer 129 is mounted to the fire-resistant layer 125 using the fixing arrangement 130 for mounting the ceiling layer 129 to the fire-resistant layer 125. The ceiling layer 129 is configured to be a ceiling, in particular a sacrificial ceiling 129. The ceiling layer 129 may be formed from plasterboard. The fixing arrangement 130 for mounting the ceiling layer 129 to the fire-resistant layer 125 contributes to the overall sound insulation of the flooring system 100. The fixing arrangement 130 for mounting the ceiling layer 129 to the fire-resistant layer 125 is configured to inhibit the transmission of sound between dwellings within the building 2. The fixing arrangement 130 for mounting the ceiling layer 129 to the fire-resistant layer 125 is configured to inhibit the transmission of sound between two dwellings within the building 2. The fixing arrangement 130 for mounting the ceiling layer 129 to the fire-resistant layer 125 is configured to inhibit the transmission of sound between two dwellings 104a, 104b within the building 2, said fixing arrangement 130 for mounting the ceiling layer 129 to the fire-resistant layer 125 being located between said two dwellings 104a, 104b within the building 2. The fixing arrangement 130 for mounting the ceiling layer 129 to the fire-resistant layer 125 is configured to inhibit the transmission of impact sound. The fixing arrangement for mounting the ceiling layer 129 to the fire-resistant layer 125 is configured to inhibit the transmission of airborne sound and / or impact sound. The fixing arrangement 130 for mounting the ceiling layer 129 to the fire-resistant layer 125 is arranged to inhibit the transmission of sound. The fixing arrangement 130 for mounting the ceiling layer 129 to the fire-resistant layer 125 is configured to decouple the ceiling layer 129 from the fire-resistant layer 125. By configured to decouple, we mean to separate the fire-resistant layer 129 from the ceiling layer 125 such that the fire-resistant layer 129 and the ceiling layer 125 are not in direct contact with each other. In use, this reduces the surface area available for transmission of structure-borne sound from one unit to another unit or units within the building 2. The fixing arrangement 130 is arranged beneath the one or more floor panels 101. In preferred non-limiting examples, the fixing arrangement 130 comprises one or more bracket assemblies (2 shown) 132 for mounting the ceiling layer 129 to the fire-resistant layer 125. In other non-limiting examples, the fixing arrangement 130 comprises one or more battens interposed between the ceiling layer 129 and the fire-resistant layer 125, said batten arranged to engage both the ceiling layer 129 and the fire-resistant layer 125. The or each bracket assembly 132 comprises a bracket 133. Each bracket assembly 132 has a mounting member 134. Each bracket 133 has a respective mounting member 134. Each bracket 133 is configured to engage the respective mounting member 134. Each mounting member 134 is fixed to the ceiling layer 129. In the non-limiting example shown, the mounting member 134 is a batten 134. Each batten 134 is fixed to the ceiling layer 129. Each batten 134 is arranged to engage the ceiling layer 129 and the respective bracket 133. Each bracket 133 is configured to engage the respective batten 134. Each bracket 133 has a U-shaped configuration. Each bracket 133 is metallic. Each bracket 133 has a mounting portion 135 configured to engage the fire-resistant layer 125. The mounting portion 135 being a central mounting portion 135. The mounting portion 135 has a flat surface configured to engage the fire-resistant layer 125. The mounting portion 135 has at least one aperture (not shown) configured to receive a mechanical fastener, such as a nail or screw. The mounting portion 135 is fixed to the fire-resistant surface 125 by mechanically fastening the mounting portion 135 to the fire-resistant layer 125. The mounting portion 135 is fixed to the fire-resistant layer 125 by mechanically fastening the mounting portion 135 to the underside of the fire-resistant layer 125. Each bracket 133 has at least one mounting leg 136, and in this non-limiting example two mounting legs 136a, 136b. Each mounting leg 136a, 136b extends perpendicularly from the flat surface of the mounting portion 135. In use, each mounting leg 136a, 136b extends perpendicularly to, and away from the fire-resistant layer 129. Each mounting leg 136a, 136b has an engaging portion 137a, 137b. The engaging portion 137a, 137b of each mounting leg 136a, 136b is configured to engage the respective mounting member 134. The engaging portion 137a, 137b of each mounting leg 136a, 136b is configured to engage the respective batten 134. The engaging portion 137a, 137b of each mounting leg 136a, 136b has at least one aperture (not shown). Each aperture of the at least one aperture is configured to receive a mechanical fastener, such as a nail or screw. The engaging portion 137a, 137b of each mounting leg 136a, 136b is fixed to the respective batten 134 by mechanically fastening the engaging portion 136a, 136b to the respective batten 134. There is also provided a method for of constructing at least part of the building 2 using the building system 1. The method has a step of installing a flooring system 100, said flooring system separating a first unit 104a from a second unit 104b. The method has a step of assembling a plurality of building components 107 of a second unit 104b of the building 2. Ideally, the step of installing a flooring system 100, said flooring system 100 separating a first unit 104a from a second unit 104b, comprises a step of installing the one or more floor panels 101 within the building 2 to form part of a floor of the building 2. This forms part of the floor of the second unit of the building 104b. Installing the one or more floor panels 101 comprises lifting and positioning the one or more floor panels 100 on at least one wall of the building 2. The step of assembling the second plurality of building components 107 of the second unit 104b comprises assembling said second plurality of building components 107 on top of the one or floor panels 101 of the flooring system 100 and to form at least part of the walls of the building 2. The method also comprises a step of installing a sound-absorbing layer 102 on top of the one or more floor panels 100. The step of installing the sound-absorbing layer 102 comprises laying the sound-absorbing layer 102 on top of the one or more floor panels 100. Optionally, the step of installing the sound-absorbing layer 102 may also comprise adhering the sound-absorbing layer 102 to the one or more floor panels 100. This step can take place subsequent to step of installation of the flooring system 100, or alternatively, can take prior to installation (e.g. in an off-site location such as a factory). The method may further comprise a step of fitting resilient edge strips to the perimeter of the second plurality of building components 107 of the second unit 104b. This step takes place prior to the step of installing a screed layer 103 on top of the sound-absorbing layer 102. The method comprises a step of installing a screed layer 103 on top of the soundabsorbing layer 102. The step of installing a screed layer 103 on top of the sound-absorbing layer 102 comprises pouring screed on top of the sound-absorbing layer 102 such that the screed forms the screed layer 103. The screed layer may have a depth, for example, of at least 35 mm, such as for example a depth of 35 mm to 65 mm or 35 mm to 55 mm, or 35 mm to 45 mm. The step of pouring screed on top of the sound-absorbing layer 102 may comprise pumping the pourable screed on top of the sound-absorbing layer 102 using a pump. The method may further comprise a step of fitting resilient edge strips to the perimeter of the second plurality of building components 107 of the second unit 104b. This step takes place prior to the step of installing a screed layer 103 on top of the sound-absorbing layer 102. The method comprises a step of fixing a fire-resistant layer 125 to the one or more floor panels 101, and in particular, to the underside of the one or more floor panels 101 using at least one resilient bar 128, said resilient bar 128 being interposed between the one or more floor panels 101 and the fire-resistant layer 125. In some examples, this step takes place subsequent to installation of the one or more floor panels. In other examples, however, this step takes place prior to installation of the one or more floor panels 101, such as, for example, in an off-site location such as a factory. The method also comprises a step of fixing a ceiling layer 129 to the fire-resistant layer 125 by using a bracket assembly 132. The method may further comprise dry lining the plurality of building components 107 of the second unit 104b of the building 2. The step of dry-lining the plurality of building components 107 takes place subsequent to the step of installing a screed layer 103 on top of the sound-absorbing layer 102. Advantageously, the dry-lining taking place after the installing of the screed layer 103 can help minimise moisture risks and help prevent mould growth. In some examples, the first unit 104a is a ground floor unit 104a. By ground floor unit, we mean that the unit 104a may be a ground floor dwelling 104a. In other embodiments, the first unit 104a is situated above a ground floor unit. The skilled person will appreciate that all preferred or optional features of the invention described with reference to only some aspects or embodiments of the invention may be applied to all aspects of the invention. It will be appreciated that optional features applicable to one aspect of the invention can be used in any combination, and in any number. Moreover, they can also be used with any of the other aspects of the invention in any combination and in any number. This includes, but is not limited to, the dependent claims from any claim being used as dependent claims for any other claim in the claims of this application. In relation to the detailed description of the different embodiments of the invention, it will be understood that one or more technical features of one embodiment can be used in combination with one or more technical features of any other embodiment where the transferred use of the one or more technical features would be immediately apparent to a person of ordinary skill in the art to carry out a similar function in a similar way on the other embodiment. The features disclosed in the foregoing description or the following drawings, expressed in their specific forms or in terms of a means for performing a disclosed function, or a method or a process of attaining the disclosed result, as appropriate, may separately, or in any combination of such features be utilised for realising the invention in diverse forms thereof.

Claims

1. A floor panel for a flooring system, the floor panel comprising:a plurality of joists, wherein each joist of the plurality of joists comprises a top chord and a bottom chord, and wherein each joist of the plurality of joists comprises a webbing framework configured to interconnect the top chord and the bottom chord;wherein the floor panel is braced using at least one bracing member, wherein the at least one bracing member is at least one strongback.

2. A floor panel as claimed in claim 1, wherein the floor panel comprises a fire-resistant layer configured to prevent or slow the spreading of fire, the fire-resistant layer being fixed to the floor panel using a means for fixing the fire-resistant layer to the floor panel.

3. A floor panel as claimed in claim 2, wherein the fire-resistant layer comprises two or more layers of fire-resistant boards.

4. A floor panel as claimed in claim 3, wherein the two or more layers of fire-resistant boards are two or more layers of imperforate fire-resistant boards.

5. A floor panel as claimed in claim 3 or claim 4, wherein each layer of fire-resistant board comprises at least one-fire resistant building board.

6. A floor panel as claimed in claim 5, wherein the at least one fire-resistant building board comprises a gypsum-based type F rated plasterboard.

7. A floor panel as claimed in any one of claims 2 to 6, wherein the means for fixing the fire-resistant layer to the floor panel comprises a resilient bar.

8. A floor panel as claimed in any preceding claim, wherein the floor panel comprises an insulating material located in the floor panel.

9. A floor panel as claimed in claim 8, wherein the insulating material is a noncombustible insulating material.

10. A floor panel as claimed in claim 9, wherein the insulating material comprises mineral wool or rockwool or fibreglass.

11. A floor panel as claimed in any one of claims 8 to 10, wherein the insulating material has a density between 10 and 45 kg / m3.

12. A floor panel as claimed in any preceding clam, wherein the webbing framework has an open-web configuration.

13. A floor panel as claimed in claim 12, wherein the webbing framework is a metallic webbing framework.

14. A floor panel as claimed in any preceding claim, wherein the floor panel is configured to be top hung.

15. A floor panel as claimed in any preceding claim, wherein the at least one strongback comprises a plurality of strongbacks, wherein each strongback of the plurality of strongbacks is spaced apart at 1.75 metres on centre or less.

16. A floor panel as claimed in any preceding claim, wherein the floor panel is prefabricated off-site.

17. A flooring system comprising one or more floor panels as claimed in any preceding claim.

18. A flooring system as claimed in claim 17, wherein the flooring system comprises a sound-absorbing layer.

19. A flooring system as claimed in claim 18 wherein the sound-absorbing layer comprises an acoustic underlay.

20. A flooring system as claimed in claim 18 or claim 19, wherein the flooring system comprises a screed layer.

21. A flooring system as claimed in claim 20, wherein the sound-absorbing layer is configured to decouple the screed layer from the one or more floor panels.

22. A flooring system as claimed in any one of claims 17 to 21, wherein the flooring system further comprises a ceiling layer, wherein the ceiling layer is arranged beneath and fixed to the fire-resistant layer using a fixing arrangement for mounting the ceiling layer to the fire-resistant layer.

23. A flooring system as claimed in claim 22, wherein the fixing arrangement is configured to inhibit the transmission of sound between dwellings within the building.

24. A flooring system as claimed in claim 22 or claim 23, wherein the fixing arrangement comprises one or more bracket assemblies for mounting the ceiling layer to the fire-resistant layer.

25. A flooring system as claimed in 24, wherein the or each bracket assembly comprises:a bracket having a U-shaped configuration; anda mounting member that is fixable to the ceiling layer, said mounting member being arranged to engage the ceiling layer and the bracket.

26. A building comprising a flooring system as claimed in any one of claims 15 to 25.

27. A building as claimed in claim 26, wherein the building comprises two or more storeys.

28. A kit of parts for use in constructing at least part of one or more units of a building, the kit of parts comprising:one or more floor panels as claimed in any one of claims 1 to 15 for forming at least part of a floor of at least one unit of the building; anda plurality of building components for forming part of the walls of at least one unit of the building.

29. A kit of parts as claimed in claim 28, wherein the plurality of building components comprises a plurality of wall panels.

30. A kit of parts as claimed in claim 29, wherein each wall panel of the plurality of wall panels comprises a shutter means component for forming at least part of the shutter means of a unit of the building, and wherein each wall panel of the plurality of wall panels is prefabricated with the shutter means component such that the shutter means component forms a part of the prefabricated wall panel.

Images