Façade insulating system

Abstract

A façade insulating system (2) comprises an insulation panel (6); and a fastening rail (16) having a contact surface (48) for abutting a surface (10) of the insulation panel (6). The fastening rail (16) comprises fastening openings (38) for fastening elements (39). The fastening rail (16) comprises at least one profile section for attaching an outer panel to the fastening rail (16) in a distance to the insulation panel (6). The insulation panel (6) can be clamped between a wall structure and a fastening rail (16).

Description

[0001] Facade insulating system

[0002] Field of the invention

[0003] The present invention relates to a facade insulating system particularly for thermally insulating a wall structure of a building, and a kit for providing a facade insulating system. The insulating system may be installed at an outer surface of a wall structure and may be covered by an outer panel, i.e. a facade panel.

[0004] Background of the invention

[0005] Wall structures of buildings are often equipped with an insulation, particularly for thermally and acoustically insulating the building. Fagade insulating systems can be attached onto concrete walls, masonry, or onto building frameworks created with timber or aluminium etc., or girders or beams, concrete, or steel beams etc., or a combination of these types of building frameworks. The general design, the used material and the thickness of an insulation layer is usually chosen depending on the climate zone, in which the building is located, the desired comfort, any legal requirements that may exist, as well as the available budget. In addition, insulation used when constructing new buildings or when retrofitting existing buildings may have different requirements. When insulating a wall structure, usually an insulation layer is attached to an outer surface of the wall structure and will be cladded by an additional outer constructive layer, such as made by synthetic materials, wooden panels, marble, bricks etc. providing different patterns and / or different architectural expressions.

[0006] The resulting assembly of wall structure, insulation and the additional outer constructive layer has to accomplish several functions. Besides providing the insulation function itself, also the diffusion of moisture from inside the building to the exterior is required, while moisture shall not accumulate in the insulation to prevent a deterioration of the insulation properties and to prevent damages. Thus, a sufficient ventilation of the insulation should be enabled.

[0007] Various different materials for insulating as well as different fastening methods and systems for an installation of an insulation to a wall structure are known. Often, the insulation is provided in the form of several insulation mats or panels that are glued to the wall structure, clamped between horizontal or vertical carriers, or are fastened with fastening elements that have a head and a shaft, wherein the shaft protrudes through the respective insulation panel to be attached to the wall structure and wherein the head engages or clamps the insulation panel on its outer side. For reliably creating an insulation layer with desired properties, insulation panels need to maintain their structure and shall not be excessively compressed during their installation. When installing the insulation panels, workers thus need to pay great attention to using the correct fastening elements, a screw-in depth, clamping forces and other conditions. Given a usual time pressure, failures in doing so may occur.

[0008] EP 3 591 129 Al shows a cladding panel for exterior building walls, wherein the cladding panel comprises enhanced ventilation channels to manage moisture and to prevent issues like condensation, dry rot, and fungus, while also supporting efficient insulation to conserve energy. It is designed for installation on various building frameworks and can be used for both new constructions and renovations.

[0009] EP 4 249 700 Al shows a fagade insulating system comprising insulation panels, outer panels, fastening devices, and base profiles. Insulation panels comprise exemplarily rounded protrusions creating air channels and tongue-and-groove profiles for interlocking. Fastening devices connect outer panels to the building's wall.

[0010] EP 0 271 400 discloses a facade covering, comprising a succession of framework elements, which are arranged horizontally and reciprocally spaced, each of them having a vertical flange bearing on the wall to be covered and at least one web extending from this flange, terminated by a ledge for fixing the wall facing and having perforations. Each web is provided with means for guiding and evacuating condensation or rain which has passed through these perforations by moving it away from the bearing flange and in that the ledges of the webs support plates of a nonwaterproof wall faces and defining with said plates ventilation spaces that communicate with one another by perforations.

[0011] W02015013751 discloses a cladding assembly which includes a plurality of connecting means and one or more interlocking means. Each connecting means has a first member adapted to be affixed to a frame or an exterior of a building, and a second member configured to engage one or more cladding means. Each interlocking means has an anchoring portion and an engaging portion adapted in use to interlock with each cladding means.

[0012] Summary of the invention

[0013] There is a need for an improved fagade insulating system for exterior building wall structures, which allows an improved and / or easier mounting or fastening to building wall structures while at the same time maintaining the desired insulation properties. The present invention is set forth and characterized in the independent claims, while the dependent claims describe other characteristics of the invention.

[0014] With the above-mentioned challenges in mind, the present disclosure brings forward a fagade insulating system providing a combination of a fastening rail and a distancing element that allow a simple, quick and efficient fastening of an insulation panel to a wall structure, while at the same time maintaining a required thickness and insulation characteristics of the insulation panel by preventing excessive local compressions and at the same time ensure sufficient fastening of the insulation panel to the wall structure.

[0015] Accordingly, the present disclosure relates to a fagade insulating system comprising an insulation panel of a thermal insulation material, the insulation panel having a first surface configured to face a wall structure of a building, an opposite second surface, and side surfaces; and a fastening rail having a contact surface for abutting the second surface of the insulation panel; wherein the fastening rail comprises a plurality of fastening openings for feeding elongated fastening elements through to be attached to the wall, and wherein the fastening rail comprises at least one profile section for attaching an outer panel to the fastening rail in a distance to the insulation panel.

[0016] The fagade insulating system allows to create an insulation on a wall structure of a new or existing building. If an existing building is to be retrofitted with the facade insulating system, an existing cladding could be removed and the facade insulating system may be installed on the wall structure in the same way as with newly constructed buildings. However, the facade insulating system may instead also be installed on an existing cladding. The facade insulating system is capable of holding outer panels for cladding the building. The wall structure may refer to outer walls of a building, wherein the insulating system is to be placed on the exterior of the wall structure. The wall structure may also refer to a horizontal outer wall, such as an underside of a balcony or the like, that is to be cladded.

[0017] The insulation panel may have a generally cuboid shape. It is made of a thermal insulation material, i.e., a material that has a heat transfer coefficient sufficiently low to provide a thermal insulation function. A large variety of different materials is applicable and may, for example, comprise mineral wool, such as glass wool, stone wool or slag wool, polystyrene (foam board, typically MEPS), PUR (polyurethane), or PIR (polyisocyanurate). As an alternative, the insulation panel may also be made from renewable raw materials, such as wood fibers, cork, or hemp.

[0018] The structural rigidity of the insulation panel may vary depending on the used material. While some of the available materials lead to a higher compression resistance, i.e. a lower compressibility, other materials may form a more compressible insulation panel. The term “pressure resistance” may be understood as the ability to resist deformability, such that the insulation panel will not be compressed when mounted as part of the facade insulating system on the wall structure of the building.

[0019] Preferably, the insulation panel used in the facade insulating system may be a compression resistant insulation board. While a higher insulation material density may provide improved compression strength, a lower insulation material density may improve the insulation properties. When referring to insulation properties, this may particularly refer to a thermal conductivity as a measure of an ability to conduct heat. The thermal conductivity is commonly denoted by X. Thus, a balance between compression strength and heat transfer coefficient may be established, which may result in an optimum density of the insulation panel. Possible and preferable ranges are given further below.

[0020] The fastening rail may be provided in the form of an elongated profile component. It may be made of a metallic or a plastic material. The contact surface of the fastening rail is intended to abut the second surface of the insulation panel opposite to the wall structure for clamping the insulation panel between the wall structure and the fastening rail. If the fagade insulating system utilizes an arrangement of multiple insulation panels installed abutting each other, the fastening rail may cover the joint of at least one pair of adjacent insulating panels.

[0021] The fastening rail has a plurality of fastening openings, which may be distributed along a main extension direction. The fastening openings allow to pass through fastening elements, such as quick fasteners, screws, or other suitable devices, with which the fastening rail can be fixated to the wall structure. When the fastening rail is fixated to the wall structure, the insulation panel(s) arranged between the fastening rail and the wall structure will be clamped and a firm insulation is created. Resultantly, a facade insulation system is provided that allows to quickly provide an insulation on a wall structure of the building in a cost-efficient manner.

[0022] The at least one profile section of the fastening rail may be understood as any suitable section of the fastening rail that is capable of receiving a complementary section or part of an outer panel or of a fastening element attachable to an outer panel. It is further explained below that the profile section may be a flange.

[0023] The facade insulating system may comprise a distancing element having a first end, an opposite second end, and a support surface created between the first end and the second end; wherein the distancing element is configured to rest with the support surface on a side surface of the insulation panel and to engage with the fastening rail at the first end, such that a minimum distance between the fastening rail and the wall is determined by the length of the distancing element from the first end to the second end. When clamping the insulation panel between the fastening rail and the wall structure, it may experience a compressive force. To avoid an excessive compression of the insulation panel and at the same time ensure sufficient fastening of the insulation panel to the wall structure, the distancing element is used. Preferably, the distancing element is a separate component, which can be brought into engagement with the fastening rail to prevent that the distance between the wall structure and the fastening rail falls below a certain limit. At the minimum distance, the second end of the distancing element abuts the wall structure and prevents further advancement of the fastening rail. Thus, the region where the fastening rail acts onto the insulation panel cannot be compressed above a certain limit. Several different designs for the distancing element are possible as long as it is capable of limiting the minimum distance. Preferably, the distancing element may be designed to be placeable inside a joint between two abutting insulation panels to avoid the need of additional holes, cutouts, recesses, or the like. It is further preferred that the distancing element is configured to maintain a right angle to the main extension axis of the fastening rail. Some embodiments of the distancing element will be explained further below.

[0024] The distancing element may be dimensioned to have an extension from the first end to the second end that allows to clamp or compress the insulation panel to a predetermined extent. This allows to provide a sufficient clamping force onto the insulation panel, while maintaining the thermal properties of the insulation panel. If a screw is used as a fastening element, the screw will not be fastened too tight and the risk of the screw becoming loose, or that the screw is not sufficiently fastened is reduced. In addition, the arrangement of a plurality of insulation panels, fastening rails and distancing elements enable the creation of a firm base with tightly fitted insulation panels and fastening rails for attaching the outer panels to the fastening rails. The distancing elements is a further support of maintaining the desired properties of the insulation panel.

[0025] The distancing element may have a flat support section comprising the support surface. The distancing element may be generally flat, which allows to place it between two insulating panels that abut each other in a side-to-side arrangement. The support surface may be brought into contact with one of the insulating panels, while an opposite surface may be brought into contact with the other one of the insulating panels. The distancing element may have a thickness of less than 2 mm, preferably 1 mm or less, and may thus not create a noticeable gap between the two insulating panels.

[0026] The distancing element may have an engagement element at the first end, the engagement element being configured to engage the fastening rail. The engagement element may be configured to provide a form-fit engagement. The engagement element may be configured to be plugged into a complementary profile section of the fastening rail. Preferably, the required action for creating an engagement between the engagement element and the fastening rail should be as simple as possible to allow a quick and reliable connection to guarantee its execution during installing the insulating panel. The fastening rail may have a profile section, into which the engagement element may be plugged. The engagement element may be brought close to the respective profile section, aligned with it and then inserted.

[0027] The engagement element may have an angular profile, into which a section of the fastening rail is insertable. It may, for example, have a recess or gap that can be aligned with and moved onto the respective section.

[0028] The distancing element may have an insertion section at a distance to the first end and to the second end for a lateral insertion into a side surface of the insulation panel or an adjacent insulation panel. The insertion section is to be understood a part of the distancing element that can be inserted into an insulating panel. The insertion section may protrude away from the distancing element. It may comprise a shape that allows it to enter the insulation material without much effort. For example, it may have a flat shape with a straight or angled penetrating edge. Thermal insulation materials may often have a low material strength that allows to place an insulation panel with a side surface on the distancing element and to let the insertion section penetrate into the insulation material by exerting a force onto the insulation panel into the direction of the insertion section. The insertion section may be placed in a central section between the first end and the second end.

[0029] The insertion section may extend away from the distancing element transverse to a lengthwise direction of the distancing element. Preferably, it may be perpendicular to the support surface. An insulation panel, the side surface of which is to be penetrated by the insertion section of the distancing element, may be placed on another insulation panel, on which a distancing element is provided, at an angle of e.g. less than 45° to the wall structure. Then, it may be pushed to contact the wall structure. In doing so, it enters the insertion section without exerting excessive clamping forces onto the insulation panel between the insertion section and the wall structure.

[0030] The length of the distancing element may be smaller than a thickness of the insulating panel in a neutral, uncompressed state. Resultantly, the insulation panel may be in tight connection with the wall construction. This creates a pressing force between the wall structure and the insulation panel, leading to a friction between the insulation panel and the wall structure, allowing to carry the load of the insulation panel. Depending on the characteristics of the wall structure different distancing elements may be used. For example, if the wall structure has a smooth surface, e.g. ceramic tiles, the length of the distancing element should preferably be shorter compared to a situation where the wall structure has a rougher surface. It is advantageous to establish a sufficient friction between the wall structure and the insulation panel.

[0031] The at least one profile section may comprise a flange for abutting an outer panel to the fastening rail, wherein the flange may be substantially parallel and in a distance to the contact surface. The outer panel may be attached to the fastening rail through dedicated brackets, clips or fasteners, which can engage the flange of the fastening rail. The distance between the flange and the contact surface, however, provides a distance between an interior side of the outer panel and the insulating panel, allowing a ventilation between the outer panel and the insulating panel. The distance between the contact surface and the flange may be in a range of 15 to 25 mm. This allows a sufficient air flow to avoid moisture build-up.

[0032] The fastening rail may comprise a rib arranged between the at least one profile section and the contact surface, wherein the rib may comprise ventilation holes. Air may thus flow through the fastening rail in any direction and the installation of fastening rails does not block any ventilation between an outer panel and the insulating panel.

[0033] The fagade insulating system may comprise a base rail having a wall side attachable to the wall structure for supporting a lowermost row of insulating panels, wherein the base rail may comprise a receiving surface for placing the lowermost row of insulating panels, and wherein the receiving surface may comprise a plurality of slits for restricting a heat transfer through the base rail. The base rail may serve to hold a lowermost insulating panel if no other insulating panel beneath it is present. Thus, the receiving surface may be dimensioned to at least correspond to a respective side surface of an insulating panel. Since the receiving surface extends from the wall structure towards the outer surface of the insulating panel, a transfer of heat through the base rail should be limited. This is done by providing the plurality of slits, which divide the receiving surface into several sections, and which may provide curved or angled heat transfer paths.

[0034] The slits may be arranged parallel to the outer wall surface. Heat flux is limited to the material section between two consecutive slits. The length of the slits and the distance between the slits can be chosen to restrict the heat transfer to a desired extent but to maintain a sufficient structural stability.

[0035] The slits may be arranged in multiple parallel rows, the rows extending parallel to the wall side, wherein the slits of neighboring rows are shifted relative to each other to form meandering heat paths from the wall side through the rows of slits. The meandering heat transfer path reduces the heat flux from the outer wall surface in an outwards direction. The distance between consecutive slits in the same row may be larger to increase the structural stability. The base rail may comprise a ventilation rim section that extends along the receiving surface on an outer side of the base rail that is opposite to the wall side, wherein the ventilation rim section may comprise a plurality of ventilation holes. The ventilation rim may correspond to the rib of the fastening rail mentioned above. Consequently, the base rail supports a sufficient air flow from beneath the base rail into the intermediate space between outer panel and insulating panel and vice versa.

[0036] A clamping flange may be arranged on the receiving surface in a distance to the wall side for clamping the insulation panel between the wall structure and the clamping flange. An insulating panel is clampable between the clamping flange and the wall structure in the same way as between the fastening rail and the wall structure.

[0037] The insulation material of the insulation panel may comprise mineral wool. The term “comprise” is to be understood that other components are not strictly ruled out when mineral wool is used. Preferably, the insulation panel is made of mineral wool. It may optionally comprise a sleeve, a covering layers or similar at the first surface and / or the second surface. In the context of the invention, the term “mineral wool” may include rock wool (stone wool) and glass wool.

[0038] The insulation material may comprise crimped glass wool. This may refer to a type of glass wool that has been mechanically processed to create a crimped or wavy texture. The crimped glass wool fibers interlock with each other, thereby enhancing the ability to entrap air for improving the insulation properties, and to increase the resiliency of the insulation panel.

[0039] The insulation material of the insulation panel may comprise mineral wool having a density in the range of 50 to 120 kg / m3, such as 50 to 110 kg / m3, 50 to 100 kg / m3, 50 to 90 kg / m3or 50 to 80 kg / m3. If the mineral wool is directed to glass wool, the density may be at the lower end of the range. If the mineral wool is directed to rock or stone wool, the density may be at the higher end of the range, such as 70 to 120 kg / m3, 70 to 110 kg / m370 to 100 kg / m3or 70 to 90 kg / m3. The respective density range allows for an optimum balance between compression strength and heat transfer coefficient. The insulation panel still allows to be clamped to provide a tight connection to the wall structure, but has sufficient insulation properties.

[0040] The insulation material of the insulation panel may comprise glass wool having density in the range of 50 to 80 kg / m3, such as 50 to 70 kg / m3. This range is at the lower end of the above-identified range for mineral wool in general.

[0041] The present disclosure also relates to a kit for providing a facade insulating system, the kit comprising an insulation panel of a thermal insulation material, the insulation panel having a first surface configured to face a wall structure of a building, an opposite second surface, and side surfaces; and a fastening rail having a contact surface for abutting the second surface of the insulation panel; wherein the fastening rail comprises a plurality of fastening openings for feeding elongated fastening elements through to be attached to the wall structure, and wherein the fastening rail comprises at least one profile section for attaching an outer panel to the fastening rail in a distance to the insulation panel.

[0042] The kit may comprise a distancing element having a first end, an opposite second end, and a support surface created between the first end and the second end; wherein the distancing element is configured to rest with the support surface on a side surface of the insulation panel and to engage with the fastening rail at the first end, such that a minimum distance between the fastening rail and the wall structure, on which the facade insulating system is to be provided by the kit, is determined by the length of the distancing element from the first end to the second end.

[0043] Brief description of the drawings

[0044] Fig. 1 is a perspective view of a wall structure with a fagade insulating system.

[0045] Fig. 2 is a perspective detail view of an insulation panel, a fastening rail and a distancing element.

[0046] Fig. 3 is a perspective detail view of a distancing element.

[0047] Fig. 4 is a perspective view of a fastening rail in a first orientation.

[0048] Fig. 5 is a perspective view of a fastening rail in a second orientation

[0049] Fig. 6 is a perspective view of a fastening rail and two adjacent insulating panels.

[0050] Figs. 7 to 12 are consecutive perspective views of the elements of the facade insulating system during installation on the wall structure in horizontal rows .

[0051] Figs. 13 and 14 are consecutive perspective views of the elements of the facade insulating system during installation on the wall structure in vertical rows.

[0052] Figs. 15 and 16 are perspective views of the base rail in different orientations.

[0053] Detailed description of the invention

[0054] Having generally described the invention above, a further understanding may be obtained by reference to certain specific embodiments, which are provided herein for purposes of illustration only, and are not intended to be limiting unless otherwise specified. Throughout this document, the terms “vertical” and “horizontal” are not to be interpreted strictly. For example, the use of “vertical” and “horizontal” when referring to the arrangement of the fastening rail, is intended to mean that the fastening rail could be arranged in one of two directions perpendicular to each other, i.e. sideways and upwards / downwards when installed on the building.

[0055] Fig. 1 shows a facade insulating system 2 arranged on a wall structure 4 of a building. The wall structure 4 is exemplarily arranged on a base or a foundation 20 and stands upright. The wall structure 4 may comprise bricks, a concrete structure, wood, a metallic framework covered or infilled, and any combinations thereof. The wall structure 4 has an outer wall surface 14, to which the facade insulating system 2 is attached.

[0056] The fagade insulating system 2 comprises a plurality of insulating panels 6, which are exemplarily arranged in a matrix form. As an example, the insulating panels 6 have a generally cuboid shape with a width dimension w, a height dimension h and a thickness dimension t. Exemplary, the width dimension w is arranged to be horizontal, the height dimension h is arranged to be vertical and the thickness dimension t determines the extension of the insulating panel 6 away from the outer surface 14 of the wall structure 4.

[0057] All insulating panels 6 are arranged in a side to side contact. First surfaces 8 of the insulating panels 6 abut the outer wall surface 14. Second surfaces 10 of the insulating panels 6 are parallel to the first surfaces 8 and face away from the wall structure 4. Side surfaces 12 extend between the first surface 8 and the second surface 10 perpendicularly. Insulating panels 6 following each other in a vertical direction and in a horizontal direction abut each other with respective side surfaces 12 to form joints or joint regions between them.

[0058] The matrix form in Fig. 1 can be understood that vertical joints or joint regions of two vertically consecutive rows are not horizontally shifted, but are congruent. However, this is merely an example and the insulating panels 6 may also be arranged to form a brick-like structure, in which the joints or joint regions of two vertically consecutive rows are horizontally shifted.

[0059] In this exemplary embodiment, a base rail 18 is provided, on which a lowermost horizontal row of insulating panels 6 is arranged. The design of the base rail 18 will be explained with reference to Figs. 15 to 17 further below. To fixate the insulating panels 6 on the wall structure, a plurality of fastening rails 16 is provided, which are arranged horizontally and parallel to the base rail 18. They are arranged at a distance to each other and cover the horizontal joints between two vertically consecutive rows of insulating panels 6. The fastening rails 16 a clamp the insulating panels 6 to the wall structure 4 and are capable of holding outer panels for cladding the fagade insulating system 2. Fig. 2 shows a detailed view of an insulating panel 6, a fastening rail 16 and a distancing element 22. The fastening rail 16 exemplarily comprises two parallel C- shaped sections with their openings facing away from each other. The two C-shaped sections are arranged at a distance to each other, wherein the distance is bridged by a bridging element. This will be shown in further detail in Figs. 4 to 6.

[0060] The fastening rail 16 comprises a plurality of fastening openings 38, into which fastening elements 39 can be inserted to reach into the wall structure 4. The fastening elements 39 are configured to be fastened to the wall structure 4, such as by screwing or through a quick-connection. This leads to clamping the insulating panel 6 between the wall structure 4 and a contact surface 48 of the fastening rail 16.

[0061] To avoid an excessive compression of the insulating panel 6 as well as to provide a counter force to the fastening elements 39, a distancing element 22 is provided. It comprises an engagement element 34 that can be engaged with a rim section 36 of the fastening rail 16. The distancing element 22 exemplarily comprises a length between a first end 30 and a second end 32 that is slightly lower than the thickness t of the insulating panel 6 in an uncompressed, neutral state. By fastening the fastening rail 16 to the wall structure 4, the insulating panel 6 will be compressed to a sufficient extent, until the second end 32 touches the wall structure 4. Then, the fastening rail 16 cannot be advanced further to the wall structure 4 and the fastening of the fastening rail 16 is complete. The fastening element 39 faces a counter force exerted from the distancing element 22, leading to a tight connection with the wall structure 4.

[0062] The distancing element 22 may be made from a metallic material. It has a flat support section 26 which at one side comprises a support surface 24 that may rest on one of the side surfaces 12 of the insulating panel 6 and in this example, a horizontally arranged side surface 12. On the flat support section 26 at a side facing away from the contact surface 24, an insertion section 28 is provided, which may be configured to be insertable into the thermal insulation material of an insulating panel 6. This allows to secure the respective insulating panel 6 on the distancing element 22. By extending along a section of the fastening rail 16, the distancing element 22 is aligned to be perpendicular to the fastening rail 16 to limit the distance to the fastening rail 16 in the correct direction.

[0063] The fastening rail 16 comprises a plurality of ventilation holes 40, which may be punched out of the material of the fastening rail 16. This allows to provide a sufficient airflow to the insulating panels 6 that are in contact with the respective fastening rail 16 to improve the moisture / humidity balance.

[0064] Fig. 3 shows the distancing element 22 in a more detailed view. The engagement element 34 is illustrated to have a first leg 42, which perpendicularly extends away from the support surface 24. It may be aligned parallel to the insertion section 28 and may extend slightly further from the flat support section 26 than the insertion section 28. A second leg 44 is arranged at a distance and parallel to the first leg 42, wherein a gap 46 is enclosed between the first leg 42 and the second leg 44. The second leg 44 is arranged further away from the second end 32 than the first leg 42.

[0065] The gap 46 is dimensioned to fit on the rim section 36 of the fastening rail 16 in a form-fitting manner. Due to the length of the gap 46 along the first end 30, the gap 46 acts as a guide to correctly align the distancing element 22 relative to the fastening rail 16. Both the first leg 42 and the second leg 44 flushly contact the rim section 36, such that the rim section 36 and the legs 42 and 44 are parallel to each other and, consequently, the flat support section 26 extends away from the rim section 36 perpendicularly. By placing the distancing element 22 onto a side surface 12 of an insulating panel 6, a further alignment of the distancing element 22 can be achieved. By its flat structure, the distancing element 22 does hinder a close contact of two insulating panels 6, between which the distancing element 22 is placed. Also, it does not require cutouts or recesses for placement of the distancing element 22.

[0066] Figs. 4, 5 and 6 show the fastening rail 16 in different perspective views to clarify its exemplary design. The fastening rail 16 has a contact surface 48 on a bridging element 51 between two C-shaped sections 53. Delimiting edges 49 of C-shaped sections 53 at the side of the bridging element 51 are slightly displaced perpendicularly to the contact surface 48. In a distance and parallel to the contact surface 48, the fastening rail 16 comprises two flanges, i.e. a first flange 50 and a second flange, 52, which enclose perpendicular ribs 54 with the bridging element 51. The ribs 54 are arranged at a distance to each other and each comprises a plurality of the ventilation holes 40, which are distributed along a main extension direction of the fastening rail 16.

[0067] Fig. 5 shows several piercing devices 58 arranged at the contacting surface 48. Each of the piercing devices 58 comprises two piercing elements 56 that are spaced apart from each other and that are pairwisely arranged in close proximity to the two opposed delimiting edges 49. The piercing elements 56 are pointed or sharpened to be pierceable into the thermal insulation material of an insulation panel 6.

[0068] The bridging element 51 comprises the plurality of fastening openings 38 that are distributed along a main extension direction of the fastening rail 16.

[0069] Fig. 6 shows to horizontally adjacent insulating panels 6, as well as one fastening rail 16 with the piercing elements 56 being advanced to the insulating panels 6. When covering a joint region between two vertically consecutive rows of insulating panels 6, one piercing element 56 can be pierced into the insulating panel 6 of the lower row and one piercing element 56 can be pierced into an insulating panel 6 of the upper row. Figs. 7 to 12 show the installation of a facade insulating system 2 as presented above. In Fig. 7, the base rail 18 is attached to a bottom side of the wall structure 4. Details of the base rail 18 will be explained with reference to Figs. 15 to 17 further below. Fig. 7 shows a first insulating panel 6 being placed onto the base rail 18. The insulating panel 6 may have a low compressibility and thus a somewhat stiff structure. It is inserted into the base rail 18 at a sufficient angle, such as e.g. 30°, and then erected.

[0070] As apparent from Fig. 8, the insulating panel 6 is clamped into a confined space offered by the base rail 18. It may thus be possible to eliminate further fastening means at this position, as fastening elements 39 and fastening rails 16 arranged above the base rail 18 sufficiently secure the insulating panel 6 from exiting the base rail 18.

[0071] After providing a row of insulating panels 6 on the base rail 18, a fastening rail 16 may be provided. For example, it may be loosely fit to the existing horizontal row of insulating panels 6 by piercing it with the piercing devices 58. Also, fastening elements 39 may be loosely attached. A vertically consecutive row of insulating panels 6 can then be installed in analogy to Fig. 7, and as shown in Fig. 10.

[0072] To limit the distance between the fastening rail 16 and the outer wall surface 14, a plurality of distancing elements 22 can be engaged with the fastening rail 16 and placed on the existing horizontal row of insulating panels 6 by placing them on the uppermost side surfaces 12. When the respective horizontal row of insulating panels 6 is provided, the fastening elements 39 can be firmly fastened, as indicated in Fig. 12. When finishing all vertically consecutive horizontal rows of insulating panels 6, the insulating system 2 is installed as shown in Fig. 1.

[0073] As an alternative, horizontally consecutive vertical rows of insulating panels 6 may be provided, as demonstrated in Figs. 13 and 14. If this is intended, the fastening rails 16 will extend vertically, i.e. perpendicularly to the base rail 18. The insulating panels 6 may have a different orientation, such that their width dimension w is vertically arranged and their height dimension h horizontally. At the end, the insulating system 2 has an appearance as shown in Fig. 14.

[0074] Figs. 15 and 16 show a base rail 18 in two different perspective views. The base rail 18 comprises a wall side 60, which comprises an attachment flange 62 that is attachable to the wall structure 4. The attachment flange 62 comprises a plurality of attachment holes 64, which are distributed along the wall flange 62. Bolts or screws may be fed through the attachment holes 64 to be screwed into the wall structure 4.

[0075] A receiving surface 66 extends perpendicularly from the attachment flange 62. It is dimensioned to receive a lower side surface 12 of an insulating panel 6 between the attachment flange 62 and a clamping flange 68. The clamping flange 68 and the attachment flange 62 are exemplary dimensioned in a way that the clamping flange 68 will have substantially the same distance to the wall structure 4 as the rim section 36 of a fastening rail 16. Thus, the insulating panel 6 may be slightly compressed when being inserted into the intermediate space between the clamping flange 68 and the wall structure 4.

[0076] At a side of the receiving surface 66 that faces away from the attachment flange 62 or the wall structure 4, a plurality of slits 70 is provided. The slits 70 exemplary have an elongated rectangular shape. In this example, three parallel rows of slits 70 are provided, the slits 70 and the rows of slits 70 extending parallel to the attachment flange 62 and the clamping flange 68, respectively. The rows are distanced from each other. Neighboring slits 70 in neighboring rows are shifted along their main extension axes, such that meandering paths 72 are created from a side facing the wall structure 4 to a side facing the clamping flange 68. This allows to reduce heat flux from the wall structure 4 to the exterior side of the base rail 18 along the receiving surface 66.

[0077] At a side facing away from the attachment flange 62, a ventilation rim section 74 is provided and extends along the receiving surface 66. The ventilation rim section 74 comprises ventilation holes 40 for a ventilation air flow. The ventilation rim section 74 is bordered by a base rail flange 76, which perpendicularly extends from the receiving surface 66 and parallel to the wall structure 4 or the attachment flange 62.

[0078] Reference numerals

[0079] 2 fagade insulating system

[0080] 4 wall structure

[0081] 6 insulating panel

[0082] 8 first surface

[0083] 10 second surface

[0084] 12 side surface

[0085] 14 outer wall surface

[0086] 16 fastening rail

[0087] 18 base rail

[0088] 20 base

[0089] 22 distancing element

[0090] 24 support surface

[0091] 26 flat support section

[0092] 28 insertion section

[0093] 30 first end

[0094] 32 second end

[0095] 34 engagement element

[0096] 36 rim section 38 fastening opening

[0097] 39 fastening element

[0098] 40 ventilation hole

[0099] 42 first leg

[0100] 44 second leg

[0101] 46 gap

[0102] 48 contact surface

[0103] 49 delimiting edge

[0104] 50 first flange

[0105] 51 bridging element

[0106] 52 second flange

[0107] 53 C-shaped section

[0108] 54 rib

[0109] 56 piercing element

[0110] 58 piercing device

[0111] 60 wall side

[0112] 62 attachment flange

[0113] 64 attachment hole

[0114] 66 receiving surface

[0115] 68 clamping flange

[0116] 70 slit

[0117] 72 meandering path

[0118] 74 ventilation rim section

[0119] 76 base rail flange

Claims

CLAIMS1. A fagade insulating system (2), comprising: an insulation panel (6) of a thermal insulation material, the insulation panel (6) having a first surface (8) configured to face a wall structure (4) of a building, an opposite second surface (10), and side surfaces (12); a fastening rail (16) having a contact surface (48) for abutting the second surface (10) of the insulation panel (6); and a distancing element (22) having a first end (30), an opposite second end (32), and a support surface (24) created between the first end (30) and the second end (32); wherein the fastening rail (16) comprises a plurality of fastening openings (38) for feeding elongated fastening elements (39) through to be attached to the wall structure (4), wherein the fastening rail (16) comprises at least one profile section (50, 52) for attaching an outer panel to the fastening rail (16) in a distance to the insulation panel (6), and wherein the distancing element (22) is configured to rest with the support surface (24) on a side surface (12) of the insulation panel (6) and to engage with the fastening rail (16) at the first end (30), such that a minimum distance between the fastening rail (16) and the wall structure (4) is determined by the length of the distancing element (12) from the first end (30) to the second end (32).

2. The facade insulating system (2) according to claim 1, wherein the distancing element (22) has a flat support section (26) comprising the support surface (24).

3. The facade insulating system (2) according to claim 1 or 2, wherein the distancing element (22) has an engagement element (34) at the first end (30), the engagement element (34) being configured to engage the fastening rail (16).

4. The facade insulating system (2) according to claim 3, wherein the engagement element (34) has an angular profile, into which a section (36) of the fastening rail (16) is insertable.

5. The facade insulating system (2) according to any of the claims 1 to 4, wherein the distancing element (22) has an insertion section (28) at a distance to the first end (30) and to the second end (32) for a lateral insertion into a side surface (12) of the insulation panel (6) or an adjacent insulation panel (6).

6. The facade insulating system (2) according to claim 5, wherein the insertion section (28) extends away from the distancing element(22) transverse to a lengthwise direction of the distancing element (22).

7. The facade insulating system (2) according to any of the claims 1 to 6, wherein the length of the distancing element (22) is smaller than a thickness of the insulating panel (6) in a neutral, uncompressed state.

8. The facade insulating system (2) according to any of the preceding claims, wherein the at least one profile section (50, 52) comprises a flange (50, 52) for abutting an outer panel to the fastening rail (16), and wherein the flange (50, 52) is substantially parallel and in a distance to the contact surface (48).

9. The facade insulating system (2) according to any of the preceding claims, wherein the fastening rail (16) comprises a rib (54) arranged between the at least one profile section (50, 52) and the contact surface (48), and wherein the rib (54) comprises ventilation holes (40).

10. The facade insulating system (2) according to any of the preceding claims, comprising a base rail (18) having a wall side (60) attachable to the wall structure (4) for supporting a lowermost row of insulating panels (6), wherein the base rail (18) comprises a receiving surface (66) for placing the lowermost row of insulating panels (6), andwherein the receiving surface (66) comprises a plurality of slits (70) for restricting a heat transfer through the base rail (18).

11. The facade insulating system (2) according to claim 10, wherein the slits (70) are arranged parallel to the outer wall surface (14).

12. The facade insulating system (2) according to claim 10 or 11, wherein the slits (70) are arranged in multiple parallel rows, the rows extending parallel to the wall side (60), and wherein the slits (70) of neighboring rows are shifted relative to each other to form meandering heat paths (72) from the wall side (60) through the rows of slits (70).

13. The facade insulating system (2) according to any of the claims 10 to 12, wherein the base rail (18) comprises a ventilation rim section (74) that extends along the receiving surface (66) on an outer side of the base rail (18) that is opposite to the wall side (60), and wherein the ventilation rim section (74) comprises a plurality of ventilation holes (40).

14. The facade insulating system (2) according to any of the claims 10 to 13, wherein a clamping flange (68) is arranged on the receiving surface (66) in a distance to the wall side (60) for clamping the insulation panel (6) between the wall structure (4) and the clamping flange (68).

15. The facade insulating system (2) according to any of the preceding claims, wherein the insulation material of the insulation panel (6) comprises mineral wool.

16. The facade insulating system (2) according to any of the preceding claims, wherein the insulation material comprises crimped glass wool.

17. The facade insulating system (2) according to any of the preceding claims,wherein the insulation material of the insulation panel (6) comprises mineral wool having a density in the range of 50 to 120 kg / m3.

18. The facade insulating system (2) according to any of the preceding claims, wherein the insulation material of the insulation panel (6) comprises glass wool having a density in the range of 50 to 80 kg / m3.

19. Kit for providing a facade insulating system (2), the kit comprising: an insulation panel (6) of a thermal insulation material, the insulation panel (6) having a first surface (8) configured to face a wall structure (4) of a building, an opposite second surface (10), and side surfaces (12); and a fastening rail (16) having a contact surface (48) for abutting the second surface (10) of the insulation panel (6); wherein the fastening rail (16) comprises a plurality of fastening openings (38) for feeding elongated fastening elements (39) through to be attached to the wall structure (4), and wherein the fastening rail (16) comprises at least one profile section (50, 52) for attaching an outer panel to the fastening rail (16) in a distance to the insulation panel (6).

20. The kit of claim 19, comprising: a distancing element (22) having a first end (30), an opposite second end (32), and a support surface (24) created between the first end (30) and the second end (32); wherein the distancing element (22) is configured to rest with the support surface (24) on a side surface (12) of the insulation panel (6) and to engage with the fastening rail (16) at the first end (30), such that a minimum distance between the fastening rail (16) and the wall structure (4), on which the fagade insulating system (2) is to be provided by the kit, is determined by the length of the distancing element (12) from the first end (30) to the second end (32).

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