Multifunctional roof covering with solar roof tiles

Abstract

The invention relates to a multifunctional roof covering (1) for covering a roof of a building, wherein the roof covering (1) has an outer side (2) facing towards the surroundings (U) and an inner side (3) facing towards the interior (I) of the building. Also proposed is a method for covering a roof of a building with at least one solar roof tile (80) and for providing a multifunctional roof covering (1). Additionally proposed is an under-roof construction for the water-repellent sealing of a roof skin enveloping a building on the roof side and for providing at least one attachment unit (50) for mounting at least one solar roof tile (80), and a method for preparing a roof of a building for covering with at least one solar roof tile (80).

Description

[0001] Multifunctional roof covering with solar roof tiles

[0002] The present invention relates to a multifunctional building envelope part, in particular a multifunctional roof covering for covering the roof of a building. The invention further relates to a method for cladding a building, in particular for covering the roof of a building, with at least one solar element, in particular at least one solar roof tile, and for providing a multifunctional building envelope part, in particular a multifunctional roof covering. In addition, the invention relates to a sub-roof construction for the water-repellent sealing of a roof skin enveloping a building on the roof side and for providing at least one connection unit for mounting at least one solar roof tile or to a facade substructure for the water-repellent sealing of an outer skin enveloping a building on the side and for providing at least one connection unit for mounting at least one solar element.Furthermore, the invention relates to a method for preparing a roof of a building for covering with at least one solar roof tile or a method for preparing a facade of a building for cladding with at least one solar element. In principle, the multifunctional building envelope component can be a multifunctional facade for cladding the sides of a building.

[0003] Against the backdrop of the energy transition and lower-CO2 energy production, many systems for decentralized energy generation coupled with buildings are already known. For example, it is common practice to install solar panels on the roof of a building to utilize the thermal energy provided by solar radiation or to generate electrical energy in the form of electricity using photovoltaic (PV) technology. Essentially, this creates a multifunctional roof that not only protects the interior of the building (e.g., from precipitation) but also simultaneously generates energy.

[0004] On the one hand, there are elevated solar energy modules or PV modules for this purpose, which are mounted on the existing roof using connection structures, for example by drilling through existing roof tiles and providing such connection structures. However, homeowners often find the striking appearance of this to be a disadvantage, as the solar or PV modules visually stand out compared to the neighboring or underlying roof tiles, partly due to the very different geometries, but also because the connection structures ensure that the solar or PV modules protrude from the ground plane defined by the other tiles and are arranged at a higher level. Among other things, this protrusion from the "ground plane of the tiles" often means, for building code reasons, that the entire roof area cannot be covered with elevated solar or PV modules.PV modules are installed and the energy yield is lower than possible.

[0005] Solar roof tiles offer a solution here. They mimic the external appearance of a standard roof tile and can be installed on the same level as adjacent roof tiles. This applies to a roof that is completely covered with solar roof tiles or to a roof that is covered with a few solar roof tiles but is to be placed in close proximity to standard roof tiles.

[0006] The present invention attempts to make a contribution to systems that rely on solar roof tiles by making the systems less complex and more cost-effective, and by allowing more standard components to be used in production. Thus, to date, one of the primary functions of roof tiles, namely that of providing water-repellent sealing for the interior of a building, has naturally also had to be ensured by such solar roof tiles. To achieve this, complex structural measures are often required on the existing solar roof tiles. Even installing the corresponding systems on the roof is often complex. Furthermore, other roofing systems, such as providing equipotential bonding and storm suction protection, must be adapted to the existing solar roof tiles in a complex manner and are often specially mounted on the roof.

[0007] Just as with roofing, the problems underlying the present invention can arise on a building's facade. In this respect, the provision of a multifunctional building envelope component, for example, as a side facade of a building, should also be simplified.

[0008] Against this background, one object of the present invention is to provide a multifunctional building envelope component that enables a uniform, single-plane cladding with the greatest possible coverage for energy generation in a simple manner. In particular, the aim is to provide a multifunctional roof covering for covering the roof of a building that enables a uniform, single-plane roof covering with the greatest possible coverage for energy generation in a simple manner. In particular, components that are structurally simple to manufacture should be usable for implementing the multifunctional roof covering.

[0009] Furthermore, it is an object of the invention to propose a method as simple as possible for cladding a building with at least one solar element and for providing a multifunctional building envelope component. In particular, the invention seeks to propose a method as simple as possible for covering the roof of a building with at least one solar roof tile and for providing a multifunctional roof covering.

[0010] Furthermore, it is an object of the invention to propose a sub-roof construction that is as simple as possible for the water-repellent sealing of a roof skin enveloping a building on the roof side and for providing at least one connection unit for mounting at least one solar roof tile or a façade substructure that is as simple as possible for the water-repellent sealing of an outer skin enveloping a building on the side and for providing at least one connection unit for mounting at least one solar element.

[0011] Furthermore, it is an object of the invention to propose a method that is as simple as possible for preparing a roof of a building for covering with at least one solar roof tile or a method that is as simple as possible for preparing a facade of a building for cladding with at least one solar element.

[0012] The problem is solved with regard to a multi-functional building envelope part or a multi-functional roof covering by a multi-functional building envelope part or a multi-functional roof covering with the features of claim 1. The problem is solved with regard to methods for cladding a building or for covering a roof by a method for cladding a building or by a method for covering a roof of a building with at least one solar roof tile with the features of claim 13. The problem is solved with regard to a sub-roof construction or facade substructure by a sub-roof construction for the water-repellent sealing of a roof skin enveloping a building on the roof side or facade substructure for the water-repellent sealing of an outer skin enveloping a building on the sides, with the features of claim 15. The problem is solved with regard to a method for preparing a roof ora facade by a method for preparing a roof of a building for covering with at least one solar roof tile or by a method for preparing a facade of a building for cladding with at least one solar element having the features of claim 16.

[0013] Specifically, a multifunctional building envelope part or a multifunctional roof covering for covering the roof of a building is proposed, wherein the multifunctional building envelope part, in particular the roof covering, has an outer side facing the environment and an inner side facing the interior of the building. The inner side is designed as a dimensionally stable, preferably sheet-like, body for the water-repellent sealing of an outer skin enveloping the building, or a roof skin enveloping the building on the roof side, and for mounting on said outer skin or the roof skin. The dimensionally stable, preferably sheet-like, body has an outer side facing the environment and is designed for mounting on the outer skin or roof skin. The dimensionally stable, preferably sheet-like, body has at least two elevations extending further towards the outer side of the body.In addition, at least one connection unit with a connection unit inner side is firmly mounted on the at least two elevations on the body outer side. The connection unit has an outer leg which is spaced from the connection unit inner side in the direction of a connection unit outer side and extends in the direction of a top or ridge-side connection unit end. The outer side of the building envelope part or the roof covering is uniformly equipped with at least one solar element or solar roof tile in such a way that the at least one solar element or the at least one solar roof tile, in combination with other adjacent solar elements or solar roof tiles and / or adjacent conventional plate elements or roof tiles, forms the outer side of the building envelope part or the roof covering essentially in a common plane, in particular the tile plane, in that the at least one solar element orat least one solar roof tile with a rear hook section engages positively behind the outer leg of the connection unit.

[0014] Furthermore, a method for cladding a building with at least one solar element and for providing a multi-functional building envelope part or a method for covering a roof of a building with at least one solar roof tile and for providing a multi-functional roof covering is proposed, comprising the following steps: a) Providing an inner side of the roof covering facing the interior of the building as a dimensionally stable, preferably sheet-like, body for water-repellent sealing of a roof skin enveloping the building on the roof side (or providing an inner side of the building envelope part facing the interior of the building as a dimensionally stable body for water-repellent sealing of an outer skin enveloping the building), and thereby providing a body outer side facing towards the environment and at least two elevations of the dimensionally stable, preferably sheet-like, body extending further towards the body outer side.b) Mounting at least one connection unit on the outer side of the dimensionally stable, preferably sheet-metal body by firmly mounting an inner side of the connection unit onto the at least two elevations, and thereby providing an outer leg of the connection unit which is spaced from the inner side of the connection unit in the direction of an outer side of the connection unit and extends in the direction of an upper or ridge-side connection unit end. c) Covering the roof with the at least one solar roof tile (or cladding the outer shell with the at least one solar element) by bringing the at least one solar roof tile (or the at least one solar element) into engagement with the outer leg of the connection unit in a form-fitting manner with a rear hook section, and the at least one solar roof tile (or the at least one solar element) in combination with other adjacent solar roof tiles (orsolar elements) and / or adjacent conventional roof tiles (or conventional panel elements) form an outer side of the roof covering (or part of the building envelope) uniformly and essentially in a common plane, in particular the plane of the tiles.

[0015] In particular, the described, proposed method for covering a roof can provide a previously described, proposed multifunctional roof covering (or the method for cladding a building can provide a multifunctional building envelope part).

[0016] Furthermore, a sub-roof construction or facade substructure is proposed for the water-repellent sealing of a roof skin enveloping a building on the roof side or an outer skin enveloping it on the sides, as well as for providing at least one connection unit for the installation of at least one solar roof tile or solar element. The sub-roof construction or facade substructure has a dimensionally stable, preferably sheet-like, body for the water-repellent sealing of the roof skin or outer skin, and the sub-roof construction or facade substructure has the connection unit. The dimensionally stable, preferably sheet-like, body has an outer side facing towards the surroundings and is designed for installation on the roof skin or outer skin. The dimensionally stable, preferably sheet-like, body has at least two elevations extending further towards the outer side of the body.The connection unit is firmly mounted with an inner connection unit side onto the at least two elevations on the outer side of the body. The connection unit also has an outer leg spaced from the inner connection unit side toward a connection unit outer side and extending toward a roof ridge-side or upper connection unit end for positively connecting at least one solar roof tile or solar element.

[0017] Finally, a method for preparing a roof of a building for covering with at least one solar roof tile or a method for preparing a facade of a building for cladding with at least one solar element is proposed, comprising the following steps: a) applying a dimensionally stable, preferably sheet-like, body for water-repellent sealing to a roof skin or roof cladding enveloping the building on the roof side.an outer skin enveloping the building, and thereby providing an outer body side facing towards the surroundings and at least two elevations of the dimensionally stable, preferably sheet-like, body extending further towards the outer body side; and b) mounting at least one connection unit on the outer body side of the dimensionally stable, preferably sheet-like, body by firmly mounting a connection unit inner side onto the at least two elevations, and thereby providing an outer leg of the connection unit spaced from the connection unit inner side in the direction of a connection unit outer side and extending in the direction of a roof ridge-side or upper-side connection unit end for the form-fitting connection of at least one solar roof tile or solar element by engaging with a rear hook section of the at least one solar roof tile or solar element.

[0018] In particular, the described, proposed method for preparing a roof can be used to provide a previously described, proposed sub-roof structure (or, with the method for preparing a facade, a previously described, proposed facade substructure). In particular, the described, proposed method for preparing a roof can be used to prepare a previously described, proposed multifunctional roof covering (or, with the method for preparing a facade, a multifunctional building envelope component in the form of a multifunctional facade).

[0019] Further advantageous embodiments can be found in the following description and in particular in the figures and their description.

[0020] The present invention recognizes the significant advantage that the two fundamentally required functions—waterproofing the roof on the one hand, and energy generation through the use of solar roof tiles on the other—can be realized via two spatially separated subsystems, and these subsystems can be easily installed separately, one after the other. Thus, the dimensionally stable, preferably sheet-like, body ensures the sealing of the roof covering. The proposed connection units, which can be manufactured and installed separately from that body, then ensure the provision of a connection structure for solar roof tiles on the dimensionally stable, preferably sheet-like, body that seals the roof.If desired, the entire roof area can then be easily covered with solar roof tiles in a common, uniform plane, or solar roof tiles can be laid together with conventional tiles, but visually advantageously also in a common plane.

[0021] These advantages also apply to facade cladding (facade cladding for short). For example, the facades on the sides of a building can be designed to be multifunctional and equipped with solar elements, for example, to generate thermal energy on the building facade on the one hand, and electrical energy via PV elements on the other. The present invention can also provide a remedy here, since a uniform and dense facade plane can be provided via the separate elements of the dimensionally stable, preferably sheet-like, body, as well as the connecting unit and the final solar elements.The corresponding facade system can be advantageously mounted on existing building facades, but can also be used in new buildings or building renovations in the form of thermal insulation for building facades. Thus, the proposed system, via the water-repellent, dense component of the dimensionally stable body, can ensure that the underlying elements and building materials of the building facade are only sealed to the outside. Plastering, painting, or other cladding of the building facade, which may have been provided with thermal insulation, can then be omitted. In this case, facade cladding or a process for cladding a facade can be understood to mean that the facade of the building is not entirely, but only partially, clad with the proposed system.

[0022] In this case, a dimensionally stable body is understood to mean that fabric webs or similar are not used as very flexible and therefore not dimensionally stable layers even at normal ambient temperatures for sealing the roof skin or the outer skin (side facade of the building).

[0023] In this case, a sheet-like body is understood to be dimensionally stable, similar to the property of being dimensionally stable, meaning that the inner side of the roof covering (or the building envelope component, such as the facade cladding) is a solid body, such as a sheet metal, which is dimensionally stable and solid at normal operating temperatures. In particular, the sheet-like body is a thin material, but unlike, for example, fabric sheets, it is a rather rigid material.

[0024] The inside of the roof covering can therefore be laid on the roof by applying and positioning the dimensionally stable sheet-like inner side, for example by applying sections of the inner side, i.e. the dimensionally stable sheet-like body, to the roof skin and then connecting these sections to one another to form a common unit which then seals the roof skin as a solid body.

[0025] According to a design of the multi-functional building envelope part, in particular the multi-functional roof covering, it can be provided that a cavity is formed between the two elevations in such a way that an air flow is formed in the cavity flowing towards the upper end, in particular the roof ridge end, and under the inner side of a solar element, in particular the inner side of a solar roof tile.

[0026] Depending on the design of the multifunctional building envelope component, in particular the multifunctional roof covering, the connection unit can be designed as a top-hat rail. In particular, the top-hat rail can be arranged beneath solar elements / solar roof tiles to overlap and support several horizontally adjacent solar elements / solar roof tiles, or serve as a connection unit for them.

[0027] According to one embodiment of the multi-functional building envelope part, in particular the multi-functional roof covering, it can be provided that the connection unit has a further outer leg spaced from the connection unit inner side in the direction of a connection unit outer side, wherein this further outer leg extends in the direction of an underside, in particular eaves-side, connection unit end.

[0028] According to one embodiment of the multifunctional building envelope component, in particular the multifunctional roof covering, it can be provided that the outer leg extending toward the upper end of the connection unit, in particular the ridge end, is spaced further from the inner side of the connection unit than the outer leg extending toward the lower end of the connection unit, in particular the eave end. An overlapping arrangement of vertically adjacent solar elements / solar roof tiles mounted on the connection unit can thus be more easily realized.

[0029] According to a design of the multi-functional building envelope part, in particular the multi-functional roof covering, it can be provided that on the surface facing in the direction of the connection unit outer side of the outer leg extending in the direction of the underside, in particular the eaves side, connection unit end, a vertically viewed below adjacent solar element or plate element or a vertically viewed below adjacent solar roof tiles or conventional roof tiles rests.

[0030] According to one embodiment of the multifunctional building envelope component, in particular the multifunctional roof covering, it can be provided that the connecting unit provides a receiving space between the inner leg and the at least one solar element, in particular the at least one solar roof tile, as well as vertically adjacent elements. In this case, cabling of the at least one solar element, in particular the at least one solar roof tile, and optionally at least one adjacent solar element, in particular the solar roof tile, can be arranged in the receiving space. In particular, horizontally adjacent solar elements / solar roof tiles can be jointly wired to one another via the receiving space.

[0031] According to one embodiment of the multifunctional building envelope component, in particular the multifunctional roof covering, it can be provided that at least one ventilation opening (preferably several) for partially passing the air flow is arranged in one, preferably both, connecting sections (or connecting sections) spacing the inner leg from the outer leg (or legs). "Spacing" here means that, via the connecting section, the outer leg is generally at a certain distance from the inner leg.

[0032] According to one embodiment of the multifunctional building envelope component, in particular the multifunctional roof covering, it can be provided that at least one drainage opening for draining water from a receiving space is provided in a transition area between the inner leg and a connecting section, which is assigned to a lower (preferably eaves-side) connection unit end. This allows, in particular, the electrical components, which may be arranged in the receiving space, to be securely protected.

[0033] According to one embodiment of the multifunctional building envelope component, in particular the multifunctional roof covering, it can be provided that the connection unit is arranged in a vertical row of two adjacent solar elements, preferably solar roof tiles, spanning the solar element / solar roof tile arranged below and the solar element / solar roof tile arranged above, and below the two vertically adjacent solar elements / solar roof tiles. Alternatively or additionally, the solar element / solar roof tile arranged above can rest with its lower solar element end or eaves-side solar roof tile end on the upper solar element end or ridge-side solar roof tile end of a solar element / solar roof tile arranged below.

[0034] According to one embodiment of the multifunctional building envelope part, in particular the multifunctional roof covering, it can be provided that the rear hook section has an outer leg extending to the underside solar element end, in particular the eaves-side solar roof tile end. This can preferably also prevent direct contact between glass packages of vertically directly adjacent solar elements / solar roof tiles. According to one embodiment of the multifunctional building envelope part, in particular the multifunctional roof covering, it can be provided that the rear hook section has a front leg that encompasses and protects a front surface of the solar element (in particular the solar roof tile), which front surface is arranged at the underside solar element end, in particular the eaves-side solar roof tile end.The front leg can preferably end flush with the solar element, in particular the solar roof tile, on one or the outer side of the solar element, in particular the solar roof tile.

[0035] According to an independent aspect of the present invention, a method for dismantling an individual solar element, preferably a solar roof tile, from a composite of at least vertically adjacent solar elements, in particular solar roof tiles, is further proposed. The individual solar element, preferably a solar roof tile, to be dismantled is initially partially displaced upwards toward the building roof or roof ridge. This is preferably achieved by displacing the upper end of the solar element, in particular the ridge-side end of the solar roof tile, upwards in a free space below the solar element, preferably the solar roof tile, and thereby disengaging a rear hook portion from a connection unit.According to the proposal, the underside of the solar element, particularly the eaves-side end of the solar roof tile, is then swung forward away from the assembly, and the individual solar element to be dismantled, preferably the solar roof tile, is pulled downwards and thus removed from the assembly. It may be necessary to disconnect one or more wiring connections beforehand.

[0036] Analogously, in a quasi-reverse order, a method for mounting a single solar element / solar roof tile into an already existing assembly in which only one space is free can also be carried out, which method for disassembly represents a further independent inventive aspect of the present application.

[0037] According to an independent aspect of the present invention, a multifunctional building envelope part, in particular a multifunctional roof covering for covering the roof of a building or a multifunctional facade cladding, is also proposed. The multifunctional building envelope part, in particular the roof covering or facade cladding, has an outer side facing the environment and an inner side facing the interior of the building. Furthermore, at least one connection unit with a connection unit inner side is firmly mounted on an outer skin enveloping the building, in particular a roof skin enveloping the building on the roof side or a lateral outer skin of the building.Furthermore, the connection unit has an outer leg spaced from the connection unit inner side toward a connection unit outer side and extending toward an upper end, in particular the roof ridge end, of the connection unit. Furthermore, the outer side is uniformly equipped with at least one solar element, in particular a solar roof tile, in such a way that the at least one solar element, in particular the at least one solar roof tile, in combination with other adjacent solar elements, in particular solar roof tiles, and / or adjacent conventional panel elements, in particular roof tiles, forms the outer side of the building envelope part, in particular the roof covering or facade cladding, essentially in a common plane, in that the at least one solar element, in particular the at least one solar roof tile, engages the outer leg of the connection unit with a rear hook portion in a form-fitting manner.The connection unit provides a receiving space between an inner leg and the at least one solar element, in particular the at least one solar roof tile, as well as a vertically adjacent solar element, in particular a solar roof tile, wherein the cabling of the at least one solar element, in particular the at least one solar roof tile, and optionally at least one adjacent solar element, in particular a solar roof tile, can be or is arranged separately from the outer skin, in particular the roof skin or the lateral outer skin of the building, in the receiving space. In this proposed embodiment, there is no longer any dimensionally stable, preferably sheet-like, body provided between the connection unit(s) or solar element(s) / solar roof tile(s) and the underlying roof skin / outer skin. In this way, the sensitive components emitted by the roof skin (outer skin orThe electrical components (cabling) that are to be protected in the area further inside the building must be protected in the receiving space of the connection unit. For this purpose, it is advantageous if the connection unit is designed as a top-hat rail, and this receiving space is formed inside the top-hat rail.

[0038] In principle, embodiments according to the present disclosure are described together where possible. Even features described solely in connection with the multifunctional roof covering (or the multifunctional building envelope part) or the sub-roof construction (or the facade substructure) can, if technically expedient, be transferred to the other claim category and form independent embodiments of the present disclosure. The same applies analogously to the methods described according to the present disclosure, on the one hand, for covering a roof of a building with at least one solar roof tile (or for cladding a building) and, on the other hand, for preparing a roof of a building for covering with at least one solar roof tile (or for preparing a facade of a building), as well as across the claim categories of the described devices, systems, and methods.

[0039] In particular, the multi-functional roof covering according to the present disclosure can have the sub-roof construction according to the present disclosure or a multi-functional building envelope part in the form of a multi-functional facade cladding according to the present disclosure can have the facade substructure according to the present disclosure.

[0040] Further advantageous and preferred embodiments will become apparent from the following description with reference to the figures. The drawing, which merely shows one exemplary embodiment, shows

[0041] Fig. 1 is a schematic oblique front view of a section of a multifunctional roof covering according to the present disclosure,

[0042] Fig. 2 is a schematic sectional side view from one side of the multifunctional roof covering of Fig. 1,

[0043] Fig. 3 according to view a) the detail A from Fig. 2 in an enlarged view, as well as according to view b) a connection unit of a multifunctional roof covering according to the present disclosure in an isolated side view, as well as according to view c) a rear hook section of a solar roof tile of a multifunctional roof covering according to the present disclosure in an isolated side view,

[0044] Fig. 4 shows detail B from Fig. 2 in an enlarged view,

[0045] Fig. 5 according to view a) a schematic sectional view from below onto or into the multi-functional roof covering of Fig. 1 according to the viewing direction x in Fig. 1, and according to view b) the detail C from view a) of Fig. 5 in an enlarged view,

[0046] Fig. 6 according to view a) a schematic oblique front view of a section of another multi-functional roof covering according to the present disclosure, and according to view b) a schematic front view of this section of this other multi-functional roof covering from view a) of Fig. 6,

[0047] Fig. 7 is a schematic sectional side view from one side of the multifunctional roof covering of Fig. 6,

[0048] Fig. 8 shows the detail D from Fig. 7 in an enlarged view,

[0049] Fig. 9 shows another rear hook section of a solar roof tile of a multi-functional roof covering according to the present disclosure in an isolated side view,

[0050] Fig. 10 shows the detail G from Fig. 7 in an enlarged view,

[0051] Fig. 11 another embodiment of a connection unit (top hat rail),

[0052] Fig. 12 the connection unit (top hat rail) according to Fig. 11 in a perspective view,

[0053] Fig. 13 the connection unit (top hat rail) according to Fig. 11 in a front view, Fig. 14 the connection unit (top hat rail) according to Fig. 11 in a plan view,

[0054] Fig. 15 another embodiment of a roof covering or facade cladding in a partial view from the side,

[0055] Fig. 16 the roof covering or facade cladding on Fig. 15 in a partial view in a perspective view, and

[0056] Fig. 17 shows another embodiment of a rear hook section.

[0057] Fig. 1 shows a schematic oblique front view of a section of a multifunctional roof covering 1 according to the present disclosure. The outer side of the roof covering 1 is formed by twelve solar roof tiles 80 in the section shown. The solar roof tiles 80 are provided on the outside with a glass package, in which PV elements for generating electrical power from solar radiation are integrated. The outer shape and appearance of the solar roof tiles 80 correspond to those of conventional roof tiles; in the illustrated embodiment in Fig. 1 (and Figs. 2 to 5), they have the appearance of flat tiles, which is why these solar roof tiles 80 can also be referred to as solar flat tiles. In the exemplary embodiment shown in Fig. 6 (as well as the illustrations in Figs. 7, 8, and10) are not solar flat tiles, but rather solar roof tiles 80 modelled on a roof tile in the plain design, which solar roof tiles 80 can therefore also be referred to as solar plain roof tiles.

[0058] In Fig. 1, the twelve solar roof tiles 80 in the section shown are arranged in four vertically adjacent rows, each with three solar roof tiles 80 laterally adjacent in the horizontal direction. In Fig. 6 (or Fig. 7), in turn, the section shown basically shows fifteen solar roof tiles 80, arranged in three vertically adjacent rows, each with five solar roof tiles 80 laterally adjacent in the horizontal direction.

[0059] Due to the analogous properties with regard to the multi-functional roof covering 1, the following description therefore simultaneously serves to understand the embodiment of the roof covering 1 with solar flat tiles or alternatively solar plain roof tiles shown in Fig. 1 and following as well as in Fig. 6 and following, whereby special features of the embodiment of Fig. 6 will be discussed again later.

[0060] In the following, reference is made simultaneously to Fig. 1 as well as to Fig. 2, Fig. 3, Fig. 4, and Fig. 5. The roof covering 1 can be assigned an eaves-side end 4 and an opposite ridge-side end 5. In principle, the entire roof, in particular a pitched roof, can be covered with the proposed roof covering 1. The eaves-side end 4 then ends in the eaves located at the bottom of the roof, while the ridge-side end 5 corresponds to the ridge.

[0061] A dimensionally stable, sheet-like body 20 in the form of a trapezoidal sheet 21 is provided as the underside of the roof covering 1, which represents the inner side 3. The trapezoidal sheet 21 is applied to the roof covering to provide water-repellent waterproofing. This seals the roof. The multifunctional roof covering 1 can, in principle, also be installed as a supplement to existing roofs covered with a trapezoidal sheet 21.

[0062] The trapezoidal sheet 21 is mounted on the roof membrane or underlayment. The roof structure beneath the trapezoidal sheet 21 can correspond to a standard roof structure, for example, with rafters, roofing membrane, battens, and counter battens. The trapezoidal sheet 21 not only makes the roof watertight, but also ensures a high degree of fire safety.

[0063] The trapezoidal sheet 21 can be made of aluminum or steel sheet. In the present preferred embodiment, the trapezoidal sheet has a thickness of 0.75 mm.

[0064] In addition to providing a waterproof outer skin, the trapezoidal sheet metal 21 also ensures a clear separation in the form of an independent separating body between the solar roof tile 80 located on the outer side 2 and the elements of the roof to be covered (roof skin or underlay or the like) adjoining the inner side 3. This eliminates the need for the cabling 100 of the solar roof tile 80 to be specifically secured, for example, held, on the solar roof tile inner sides 83. Rather, the cabling 100 can advantageously simply rest on the trapezoidal sheet metal 21, specifically on the outer side 22 of the dimensionally stable, sheet-like body 20, as is not otherwise the case with a roof skin or underlay of a roof-sealing solar roof tile, since resting the cabling and connectors directly on the roof skin or underlay is too dangerous or even not permitted due to legal requirements.

[0065] The trapezoidal sheet 21 also serves as a separation plane for separating electrical contacts such as the wiring 100 or plugs of the solar roof tiles 80 from the roof skin or underlayment located beneath the roof covering 1.

[0066] The trapezoidal sheet 21, or the dimensionally stable, sheet-like body 20, has an outer body side 22, which, in the installed state of the roof covering 1, generally faces the external environment U, and an opposite inner body side 23, which faces the interior I of the building. The inner body side 23 rests on the existing base structure beneath the proposed roof covering 1 (e.g., the roof skin) and is securely connected to it.

[0067] The trapezoidal sheet 21 has elevations 26 that extend from a body end 24 on the eaves side to a body end 25 on the ridge side. In the present case, the respective ends of the illustrated section of the trapezoidal sheet 21 are identified by the reference numerals 24 and 25. On a pitched roof, the roof covering 21 and accordingly also the trapezoidal sheet 21 can extend further upwards towards the ridge and further downwards towards the eaves. In this case, the elevations 26 can also extend further upwards or downwards. In principle, it is also conceivable for the elevations 26 not to extend all the way from the eaves to the ridge or for them to be interrupted in between and thus not to be continuous. A depression 27 is formed between each two adjacent elevations 26.

[0068] Flow channels are formed through the recesses 27, whereby an air duct can be created, namely from the eaves to the roof ridge. An air flow L is indicated by the dashed arrow in Fig. 1 and also in Fig. 6. The resulting air flow L can, on the one hand, serve to cool the solar roof tiles 80 or the PV units or, under certain circumstances, adjacent conventional roof tiles; on the other hand, the heat absorbed by the air flow L up to the roof ridge can also be provided and used as thermal energy. For example, in subsequent processes for energy use in the house. One example could be the installation of heat pumps, also for the provision of heating energy, whereby appropriately heated air from the air flow L can be supplied to the heat pump.

[0069] The space provided by the recesses 27 between the body outer side 22 and the solar roof tile inner side 83 can also be used to form the cabling 100 of the adjacent solar roof tiles 80.

[0070] The reference numeral 70 indicates the cavity 70, which can be used to form the air flow L and to form the wiring 100.

[0071] The statements made with regard to the roof covering 1 in relation to the illustrated and previously described embodiments can also be applied to facade cladding. Thus, the illustrated dimensionally stable body 20, preferably in sheet metal form, for example in the form of a trapezoidal sheet 21, can also be mounted on a facade of a building. This body 20 can then also ensure watertightness on the facade, as well as increased fire protection, and also serve as a separation plane so that the PV elements further outwardly following the dimensionally stable body 20 are also safely separated. In this respect, a facade cladding 1 is provided instead of a roof covering 1. All ends on the ridge side (including the body ends, connection unit ends, and solar roof tile ends described later) then refer to the top end.When looking at the respective building, the "top side" refers to the vertically upper area of ​​the respective element on the building façade. All eaves-side ends (including the body ends, connection unit ends, and solar roof tile ends described later) then refer to the underside. When looking at the respective building, the "underside" refers to the vertically lower area of ​​the respective element on the building façade. Instead of a solar roof tile 80, the façade is generally referred to as a solar element 80. Insofar as the following refers to covering a roof with solar roof tiles 80, this information can also be applied to cladding a building façade with solar elements.

[0072] With regard to the trapezoidal sheet 21, it is also possible that it is not a sheet as a dimensionally stable body 20, but rather another dimensionally stable, metallic body. Instead of a typical continuous trapezoidal sheet 21 (which is usually screwed to the existing roof covering in large, sometimes also several small formats, specifically usually to the battens), a so-called folded sheet can also be used. The basic geometry with elevations 26 and depressions 27 is then analogous. With the folded sheet, however, metallic holders are screwed to the roof truss (or the existing facade structure) and then the folded sheet is inserted into these holders. The folded sheet is then only attached to the roof ridge (orThe roof cladding is screwed to the roof surface (e.g., to the upper area of ​​a facade), so that there are virtually no penetrations across the entire roof surface or facade surface, in comparison to the screw-mounted installation of a trapezoidal sheet. Both types of dimensionally stable, sheet-like bodies 20, such as the trapezoidal sheet 21 or the described folded sheet, can be used in this case. The following description of the properties of the trapezoidal sheet 21, particularly with regard to the geometry and the connection of components located further out (connection unit, solar roof tile or solar element, etc.), can also be applied to the use of a folded sheet, even if the trapezoidal sheet 21 is referred to below.

[0073] Several connection units are mounted on the elevations 26 of the trapezoidal sheet 21

[0074] 50 in the form of Z-profiles 51. The Z-profiles 51 run transversely as a kind of transverse additional roof batten. In this case, the Z-profiles 51 are made of aluminum. The Z-profiles 51 rest with their connection unit inner side 53 in the form of the respective inner legs 56 (see Fig. 3 b)) on the body outer side 22 (the elevations 26). The Z-profiles

[0075] 51 are firmly riveted to the trapezoidal sheet metal 21. Additionally or alternatively, the Z-profiles 51 can also be screwed to the underlying roof battens. The Z-profile 51 extends from the inner leg 56 with a connecting section 58 to a connecting unit outer side 52 spaced from the connecting unit inner side 53. The connecting unit outer side 52 is in turn formed by the outer leg 57.

[0076] To cover the roof with solar roof tiles 80, rear hook sections 90 engage with the connecting units 50 (Z-profile 51). The hook sections 90 are designed as U-profiles 91 and are provided on the inner side 83 of the solar roof tile, specifically in the area of ​​the eaves-side solar roof tile end 84.

[0077] The U-profiles 91 are connected to the underside of the solar roof tiles 80 by the outer leg 92. A connecting section 94 of the U-profile 91 then spaces an inner leg 93 of the U-profile 91, which is located further towards the trapezoidal sheet 21 (cf. Fig. 3 c) or Fig. 9). A receptacle 98 is formed by the U-profile 91. The receptacle 98 is open in the direction of the eaves-side solar roof tile end 84. With this open side, the receptacle 98 and thus the U-profile 91 encloses the outer leg 57 of the connection unit 50. This creates a positive connection between the solar roof tile 80 and the connection unit 50 and thus also to the trapezoidal sheet 21.

[0078] Furthermore, a rear retaining lug 95 can be provided on the solar roof tile inner side 83, specifically in the present case in an area of ​​the ridge-side solar roof tile end 85, to reinforce the stable connection of the solar roof tile 80. This rear retaining lug 95 is also designed as a U-profile 96. With its underside 97, the retaining lug 95 engages around the solar roof tile inner side 83 of a solar roof tile 80 located below.

[0079] In this way, effective storm suction protection is achieved. In the lower area of ​​the eave-side solar roof tile end 84, the rear hook sections 90 of a solar roof tile 80 hook onto the Z-profiles 51, i.e., the transversely running additional roof batten, while in the upper area of ​​the ridge-side solar roof tile end 85, the rear retaining lugs 95 of this solar roof tile 80 hook onto the adjacent solar roof tiles 80 below. Both the U-profiles 91, 96 and the Z-profile 51 are made of aluminum.

[0080] Potential equalization can also be advantageously and easily implemented via contacting elements in the form of the rear hook sections 90 and the connecting sections 50 with the adjoining trapezoidal sheet 21. Lightning protection can also be achieved through appropriate material selection and a secure, continuous contact.

[0081] According to the design of the rear hook section 90 shown in detail in Fig. 9, particularly secure contact between the individual components, in particular the U-profile 91 and the Z-profile 51, is possible, thus enabling improved storm suction protection and reliable potential equalization. For this purpose, the U-profile 91 of the rear hook section 90 according to Fig. 9 has a raised portion 99 on the inner leg 93, which raised portion 99 extends further upwards than a lower end of the connecting portion 94. The outer leg 57 must therefore be inserted into the corresponding receptacle 98 of the rear hook section 90 shown in Fig. 9 with greater force when installing the corresponding solar roof tile 80.Since the assembly process is reversed, meaning that the solar roof tile 80 with the rear hook section 90 and the receptacle 98, including the raised portion 99, must be actively brought into contact with the outer leg 57 of the Z-profile 51, a greater force is required for this. The rear hook section 90 and the connecting unit 50 are thus not only brought into a positive engagement with each other, but also into a force-locking engagement in the form of a clamp fit. The contact between the two units is thus firmer and more secure, which also increases the potential equalization and the storm suction protection achieved.

[0082] As mentioned, Fig. 6, Fig. 7, Fig. 8, and Fig. 10 show the roof covering 1 according to the present disclosure, with the difference that solar plain tile roof tiles are used as solar roof tiles 80 instead of solar flat tiles. In this respect, reference can essentially be made to the description of the exemplary embodiment according to Figs. 1 to 5 already given. Only the special features of the roof covering 1 in the plain tile design, i.e., with solar roof tiles 80 in the form of solar plain tile roof tiles, are explained below.

[0083] Crown covering elements 81 are provided, which advantageously do not have to extend the entire length, like the corresponding solar plain tile roof tiles. The crown covering elements 81 can have a considerably shorter longitudinal extension. In particular, storm suction protection, as described above, can be implemented without any special involvement of the crown covering elements 81.

[0084] Figs. 11 to 14 show various views of a further embodiment of a connection unit 50. This can also be used with the previously described roof coverings 1 or facade cladding 1 according to the preceding figures, as an alternative to the Z-profile 51 shown and described in these preceding figures. The connection unit according to Figs. 11 to 14, which is also shown in Figs. 15 and 16 in use in a roof covering 1 or facade cladding 1, is a top-hat rail 59.

[0085] The top-hat rail 59 is also made of metal, for example, aluminum. It can also be a sheet metal bent or folded to the corresponding cross-section (see Fig. 11), preferably a perforated sheet. Using a perforated sheet allows for material and weight savings, while also allowing the holes to fulfill various specific functions, as described later.

[0086] As can be seen from the cross-section in Fig. 11, the top-hat rail 59 is designed in a double-Z shape, so to speak, compared to the other embodiment of the connection unit 50 of the Z-profile 51, better described as a hat shape. The top side of the hat shape represents the underside of the top-hat rail 59. Accordingly, the top-hat rail 59 has a connection unit outer side 52 facing the downstream solar elements 80 or solar roof tiles 80, as well as an opposite connection unit inner side 53 facing the dimensionally stable, preferably sheet-like, body 20. The connection unit inner side 53 is formed by an inner leg 56, from which two connecting sections 58 (instead of just one connecting section 58 in the Z-profile 51) extend upward toward the connection unit outer side 52. Furthermore, the top-hat rail 59 has two outer legs 57 (instead of only one outer leg

[0087] 57 in the case of the Z-profile 51). The outer legs 57 again form support surfaces or connection points on the connection unit outer side 52 for the solar elements 80 or solar roof tiles 80 lying thereon in the final assembled state on the roof or on the facade. In order to differentiate between the two connecting sections 58 and outer legs 57, these can be referred to with regard to their use as connecting section 58 and outer leg 57 at the eaves-side or underside connection unit end 54 (in Fig. 11 left) or as connecting section 58 and outer leg 57 at the ridge-side or top-side connection unit end 55 (in Fig. 11 right).

[0088] In the mounted state with the solar elements or solar roof tiles 80 placed on it, the top-hat rail 59 ensures that these solar elements or solar roof tiles 80 are spaced apart from the dimensionally stable body 50 (trapezoidal sheet 51 or folded sheet) arranged below the top-hat rail 59. The air ducts for the air flow L can thus be formed again. Due to its geometry, the top-hat rail 59 already ensures an overlapping arrangement of the solar elements or solar roof tiles 80. For example, the connecting section 58 on the ridge-side or upper-side connection unit end 55 is longer than the one on the eaves-side or lower-side connection unit end 54. As a result, the solar element or solar roof tile 80 which is adjacent above (seen vertically) is spaced further apart from the roof skin or the dimensionally stable body 20, so that the solar element or solar roof tile which is upper (seen vertically)Solar roof tile 80 rests with its lower end (eaves-side solar roof tile end 84 or underside solar element end 84) on the upper end of the vertically adjacent solar element or solar roof tile 80 below (i.e. on its ridge-side solar roof tile end 85 or upper-side solar element end 85) (see also Fig. 15 or 16).

[0089] Furthermore, the (smaller) angle between the two legs present at the eaves-side solar roof tile end 84 or the underside solar element end 84 in the form of the connecting section 58 and outer leg

[0090] 58 is slightly larger than 90°. Preferably, the angle there (i.e., at the shorter of the two connecting sections 58) is between 90.1° and 95.0°, particularly preferably between 91.5° and 92.0°. In contrast, the (smaller) angle between the two legs present at the ridge-side solar roof tile end 85 or the top-side solar element end 85 in the form of the connecting section 58 there and outer leg 58 is slightly smaller than 90°. Preferably, the angle there (i.e., at the longer of the two connecting sections 58) is between 89.9° and 86.0°, particularly preferably between 87.5° and 88.5°.

[0091] The distance between the two connecting sections 58, and the length of the inner leg 56 in that direction, is between 60 mm and 100 mm, preferably between 75 mm and 85 mm. The length of the shorter connecting section 58, viewed in the direction from the inner leg 56 to the outer leg 57, is between 25 mm and 55 mm, preferably between 30 mm and 40 mm. The length of the longer connecting section 58, viewed in the direction from the inner leg 56 to the outer leg 57, is between 30 mm and 60 mm, preferably between 35 mm and 45 mm. The two outer legs 57, which form the support surfaces or connection points for solar elements or solar roof tiles 80 arranged above, can also be of different lengths, measured along their longitudinal extent from the respective connecting section 58 to the side.Preferably, the outer leg 58 adjoining the longer connecting section 58 is longer than the outer leg 58 adjoining the shorter connecting section 58. The length of the longer outer leg 57 is between 8 mm and 25 mm, preferably between 13 mm and 17 mm. The length of the shorter outer leg 57 is between 6 mm and 20 mm, preferably between 10 mm and 15 mm.

[0092] The top-hat rail 59 has various holes that fulfill different functions. Firstly, ventilation openings 61 are provided in the connecting sections 58, whereby the air flow can also be guided over and through the top-hat rails 59. Furthermore, drainage openings 62 are provided in the lower corner between the inner leg 56 and the adjacent connecting section 58 on the underside, through which water (such as rainwater) penetrating into and accumulating in the cavity 60 can drain away. Furthermore, there are mounting openings 63 in the area of ​​the inner leg 56, via which the top-hat rail 59 can be attached to the underlying structure of the building, for example, the dimensionally stable body 20. The top-hat rail can be screwed or riveted to the body 20, for example.

[0093] Fig. 15 shows a roof covering or facade cladding 1, as implemented with connection units 50 designed as top-hat rails 59. The top-hat rails 59 each provide a receiving space 60 in which the cabling 100 can be safely routed and, above all, safely separated from the further interior sections of the building.

[0094] The top-hat rail 59 is arranged across two adjacent solar elements / solar roof tiles 80. It accordingly supports both adjacent solar elements / solar roof tiles 80. Sufficient free space is provided in the receiving space 60 for the solar element / solar roof tile 80 located below, so that it can be moved upwards towards the top or roof ridge for individual disassembly and thus disengaged from the connecting unit on its underside (eaves-side solar roof tile end 84; underside solar element end 84). The corresponding solar element / solar roof tile can then be pivoted out of the assembly and pulled downwards (if necessary, after first disconnecting any cabling). This process is also possible due to the fact that the vertically adjacent solar elements / solar roof tiles 80 are arranged overlapping and not butting up.

[0095] In Fig. 16, the interaction of three vertically adjacent solar roof tiles 80 and top hat rails 59 as well as the dimensionally stable body 20 underneath is again shown in a partial section.

[0096] Fig. 17 shows the hook section 90 separately in a side view. This hook section 90 differs partially from the hook section 90 shown and described in Figs. 1 to 10 in the form of the U-profile 91 (in particular according to Fig. 3c) or Fig. 9), whereby some properties can also be transferred from the corresponding previously described U-profiles 91. Specifically, an outer leg 92 is also present, which is arranged or attached to the inner side 83 of the solar roof tile, whereby the rear hook section 90 is located below the corresponding solar roof tile 80. Furthermore, a connecting section 94 and an inner leg 93 are also provided, which together form the receptacle 98, which in turn ensures engagement with the connecting unit 50 (specifically its outer leg 57). A raised portion 99 is also present, which ensures a clamp fit with the connecting unit 50.

[0097] What is different here in Fig. 17 is that the outer leg 92 extends to the underside end of the solar element or the eaves-side end 84 of the solar roof tile. Furthermore, a front leg 101 is then provided adjoining that outer leg 92, which is bent or protrudes towards the outside. This front leg 101 is therefore arranged at the underside end 84 of the solar element or the eaves-side end 84 of the solar roof tile and encompasses and protects the front surface of the solar element or solar roof tile there. The front leg 101 extends to the outside 82 of the solar element or the outside 82 of the solar roof tile and ends there flush with the solar element or solar roof tile 80. In this way, edge protection for the glass package of the solar element or solar roof tile 80 is simultaneously provided by the front leg 101.

[0098] List of reference symbols

[0099] 1 roof covering; 63 mounting openings facade cladding 70 cavity

[0100] 2 Outside (of the roof covering) 80 solar roof tiles; solar element

[0101] 3 Inside (of the roof covering) 81 crown covering elements

[0102] 4 Eaves-side 82 solar roof tile exterior; (underside) end solar element exterior

[0103] 5 Roof ridge side (top side) 83 Solar roof tile inside; end solar element inside

[0104] 20 dimensionally stable, sheet-like body 84 eaves-side

[0105] 21 Trapezoidal sheet solar roof tile end; underside

[0106] 22 Body outside solar element end

[0107] 23 Body inside 85 Roof ridge side solar roof tile

[0108] 24 Eaves-side end; top solar element (bottom) body end

[0109] 25 Ridge-side (top) 90 rear hook section Body end 91 U-profile

[0110] 26 elevation 92 outer thigh

[0111] 27 recess 93 inner leg

[0112] 50 connection unit 94 connecting section

[0113] 51 Z-profile 95 rear retaining nose

[0114] 52 Connection unit outside 96 U-profile

[0115] 53 Connection unit inside 97 Bottom

[0116] 54 Eaves-side 98 Mount (underside) 99 Elevation Connection unit end 100 Cabling

[0117] 55 Ridge-side (top) 101 Front leg connection unit end

[0118] 56 inner leg U surroundings

[0119] 57 Outer leg I Interior (of the building)

[0120] 58 Connecting section L air flow

[0121] 59 DIN rail

[0122] 60 recording room

[0123] 61 ventilation openings

[0124] 62 drain openings

Claims

Patent claims Multi-functional building envelope part, in particular multi-functional roof covering (1) for covering a roof of a building, wherein the multi-functional building envelope part, in particular the roof covering (1), has an outer side (2) facing the environment (U) and an inner side (3) facing the interior (I) of the building, wherein the inner side (3) is designed as a dimensionally stable, preferably sheet-like, body (20) for the water-repellent sealing of an outer skin enveloping the building, in particular a roof skin enveloping the building on the roof side, and for mounting on the outer skin, in particular roof skin, wherein the dimensionally stable, preferably sheet-like, body (20) has a body outer side (22) facing the environment (U) and is designed for mounting on the outer skin, in particular roof skin, and wherein the dimensionally stable, preferably sheet-like,Body (20) has at least two elevations (26) extending further towards the body outer side (22), wherein at least one connection unit (50) with a connection unit inner side (53) is fixedly mounted on the at least two elevations (26) on the body outer side (22), and wherein the connection unit (50) has an outer leg (57) spaced from the connection unit inner side (53) in the direction of a connection unit outer side (52) and extending in the direction of an upper, in particular roof ridge-side, connection unit end (55), wherein the outer side (2) is uniformly equipped with at least one solar element, in particular solar roof tile (80), such that the at least one solar element, in particular the at least one solar roof tile (80), in combination with further adjacent solar elements, in particular solar roof tiles (80), and / or adjacent conventional plate elements, in particular roof tiles,the outer side (2) of the building envelope part, in particular of the roof covering (1), is formed substantially in a common plane, in particular tile plane, by the at least one solar element, in particular the at least one solar roof tile (80), with, a rear hook portion (90) positively engages behind the outer leg (57) of the connecting unit (50). A multifunctional building envelope part, in particular a multifunctional roof covering (1), according to claim 1, wherein a cavity (70) is formed between the two elevations (26) such that an air flow is formed in the cavity (70), flowing in the direction of the upper end (5), in particular the ridge end, and under the inner side of a solar element, in particular the inner side of a solar roof tile (83). A multifunctional building envelope part, in particular a multifunctional roof covering (1), according to claim 1 or 2, wherein the connecting unit (50) is designed as a top-hat rail (59).Multi-functional building envelope part, in particular multi-functional roof covering (1), according to at least one of claims 1 to 3, wherein the connection unit (50) has a further outer leg (57) spaced from the connection unit inner side (53) in the direction of a connection unit outer side (52), wherein this further outer leg (57) extends in the direction of an underside, in particular eaves-side, connection unit end (54). Multi-functional building envelope part, in particular multi-functional roof covering (1), at least according to claim 4, wherein the outer leg (57) extending in the direction of the upper, in particular ridge-side, connection unit end (55) is spaced further from the connection unit inner side (53) than the outer leg (57) extending in the direction of the lower, in particular eaves-side, connection unit end (54).Multi-functional building envelope part, in particular multi-functional roof covering (1), according to at least one of claims 4 or 5, wherein on the surface pointing in the direction of the connection unit outer side (52) of the outer leg (57) extending in the direction of the underside, in particular eaves-side, connection unit end (54), a vertically viewed below adjacent solar element (80) or. A plate element or a plate element resting vertically beneath adjacent solar roof tiles (80) or conventional roof tiles. A multifunctional building envelope component, in particular a multifunctional roof covering (1), according to at least one of claims 1 to 6, wherein the connecting unit (50) provides a receiving space (60) between the inner leg (56) and the at least one solar element, in particular the at least one solar roof tile (80), as well as vertically adjacent elements, wherein cabling (100) of the at least one solar element, in particular the at least one solar roof tile (80), and optionally of at least one adjacent solar element, in particular the solar roof tile (80), can be or is arranged in the receiving space (60).A multifunctional building envelope part, in particular a multifunctional roof covering (1), according to at least one of claims 1 to 7, wherein at least one ventilation opening (61) for partially passing the air flow (L) is arranged in one, preferably both, connecting sections (58) spacing the inner leg (56) from the outer leg, preferably the outer legs (57). A multifunctional building envelope part, in particular a multifunctional roof covering (1), according to at least one of claims 1 to 8, wherein at least one drainage opening (62) for draining water from a receiving space (60) is provided in a transition region between the inner leg (56) and a connecting section (58) associated with a lower, preferably eaves-side, connection unit end (54).Multi-functional building envelope part, in particular multi-functional roof covering (1), according to at least one of claims 1 to 9, wherein the connection unit (50) in a vertical row of two adjacent solar elements, preferably solar roof tiles (80), overlaps the solar element / solar roof tile (80) arranged below and the solar element / solar roof tile (80) arranged above. and is arranged below the two vertically adjacent solar elements / solar roof tiles (80), and / or wherein a solar element / solar roof tile (80) arranged above rests with its underside solar element end or eaves-side solar roof tile end (84) on a / the upper-side solar element end or ridge-side solar roof tile end (85) of a / the solar element / solar roof tile (80) arranged below. A multifunctional building envelope part, in particular a multifunctional roof covering (1), according to at least one of claims 1 to 10, wherein the rear hook section (90) has an outer leg (92) extending to a / the underside solar element end, in particular the eaves-side solar roof tile end (84).Multifunctional building envelope part, in particular multi-functional roof covering (1), according to at least one of claims 1 to 11, wherein the rear hook section (90) has a front leg (101) which surrounds and protects a front surface of the solar element, in particular solar roof tile (80), arranged on a / the underside solar element end, in particular eaves-side solar roof tile end (84), preferably on a / the solar element outer side, in particular solar roof tile outer side (82), flush with the solar element, in particular solar roof tile (80).Method for cladding a building, in particular for covering a roof of a building, with at least one solar element, in particular solar roof tiles (80), and for providing a multi-functional building envelope part, in particular a multi-functional roof covering (1), in particular according to at least one of claims 1 to 12, with the following steps: a) Providing an inner side (3) of the building envelope part, in particular of the roof covering (1), facing the interior (I) of the building, as a dimensionally stable, preferably sheet-like, body (20) for water-repellent sealing of the building. enveloping outer skin, in particular a roof skin enveloping the building on the roof side, and thereby providing a body outer side (22) pointing in the direction of the surroundings (U) and at least two elevations (26) of the dimensionally stable, preferably sheet-like, body (20) extending further towards the body outer side (22); b) mounting at least one connection unit (50) on the body outer side (22) of the dimensionally stable, preferably sheet-like, body (20) by firmly mounting a connection unit inner side (53) onto the at least two elevations (26), and thereby providing an outer leg (57) of the connection unit (50) spaced from the connection unit inner side (53) in the direction of a connection unit outer side (52) and extending in the direction of an upper, in particular roof ridge-side, connection unit end (55); and c) covering the outer shell with at least one solar element,In particular, covering the roof with the at least one solar roof tile (80), in which the at least one solar element, in particular the at least one solar roof tile (80), is brought into engagement with a rear hook portion (90) in a form-fitting manner behind the outer leg (57) of the connection unit (50), and the at least one solar element, in particular the at least one solar roof tile (80), in combination with other adjacent solar elements, in particular solar roof tiles (80), and / or adjacent conventional panel elements, in particular roof tiles, forms an outer side (2) of the building envelope part, in particular the roof covering (1), uniformly substantially in a common plane, in particular the tile plane. A method for dismantling an individual solar element, preferably a solar roof tile (80), to be dismantled from a composite of at least vertically adjacent solar elements, in particular solar roof tiles (80),wherein the individual solar element to be dismantled, preferably solar roof tile (80), is initially partially is displaced upwards in the direction of the building roof or roof ridge, preferably by displacing the upper solar element end, in particular the ridge-side solar roof tile end, upwards in a free space below the solar element, preferably the solar roof tile (80), and in the process, a rear hook section (90) is disengaged from a connection unit (50), wherein a lower solar element end, in particular the eaves-side solar roof tile end (84), is then pivoted forwards away from the assembly and the individual solar element to be dismantled, preferably the solar roof tile (80), is pulled downwards and thus removed from the assembly,wherein, if necessary, a cabling (100) is also disconnected beforehand. Sub-roof construction or facade substructure for the water-repellent sealing of a roof skin enveloping a building on the roof side or an outer skin enveloping it laterally and for providing at least one connection unit (50) for the installation of at least one solar roof tile (80) or solar element, wherein the sub-roof construction or facade substructure has a dimensionally stable, preferably sheet-like, body (20) for the water-repellent sealing of the roof skin or outer skin, and wherein the sub-roof construction or facade substructure has the connection unit (50), wherein the dimensionally stable, preferably sheet-like, body (20) has a body outer side (22) facing towards the environment (U) and is designed for installation on the roof skin or outer skin, and wherein the dimensionally stable, preferably sheet-like,Body (20) has at least two elevations (26) extending further towards the body outer side (22), wherein the connection unit (50) is mounted with a connection unit inner side (53) firmly on the at least two elevations (26) on the body outer side (22) and wherein the connection unit (50) has a connecting unit inner side (53) spaced from the connection unit inner side in the direction of a connection unit outer side (52) and extending in the direction of a roof ridge-side or upper-side connection unit end (55), Outer leg (57) for the positive connection of at least one solar roof tile (80) or solar element. A method for preparing a roof of a building for covering with at least one solar roof tile (80) or a facade of a building for cladding with at least one solar element, in particular for providing a sub-roof construction or facade substructure according to claim 15, in particular for preparing a multifunctional building envelope part or a multifunctional roof covering (1) according to at least one of claims 1 to 12, comprising the following steps: a) applying a dimensionally stable, preferably sheet-like, body (20) for water-repellent sealing to an outer skin enveloping the building, in particular a roof skin enveloping the roof side,and thereby providing a body outer side (22) facing the environment (U) and at least two elevations (26) of the dimensionally stable, preferably sheet-like, body (20) extending further towards the body outer side (22); and b) mounting at least one connection unit (50) on the body outer side (22) of the dimensionally stable, preferably sheet-like, body (20) by firmly mounting a connection unit inner side (53) onto the at least two elevations (26), and thereby providing an outer leg (57) of the connection unit (50) spaced from the connection unit inner side (53) in the direction of a connection unit outer side (52) and extending in the direction of an upper, in particular roof ridge-side, connection unit end (55) for the form-fitting connection of at least one solar element, in particular a solar roof tile (80),by engaging with a rear hook portion (90) of the at least one solar element, in particular solar roof tile (80). A multifunctional building envelope part, in particular a multifunctional roof covering (1) for covering a roof of a building or a multifunctional facade cladding, wherein the multifunctional building envelope part, in particular the roof covering (1) or facade cladding, has an outer side (2) facing the environment (U) and an inner side (3) facing the interior (I) of the building, wherein at least one connection unit (50) with a connection unit inner side (53) is firmly mounted on an outer skin enveloping the building, in particular a roof skin enveloping the building on the roof side or a lateral outer skin of the building, and wherein the connection unit (50) has an outer leg (57) spaced from the connection unit inner side (53) in the direction of a connection unit outer side (52) and extending in the direction of an upper, in particular ridge-side, connection unit end (55),wherein the outer side (2) is uniformly equipped with at least one solar element, in particular solar roof tile (80), such that the at least one solar element, in particular the at least one solar roof tile (80), in combination with further adjacent solar elements, in particular solar roof tiles (80), and / or adjacent conventional panel elements, in particular roof tiles, forms the outer side (2) of the building envelope part, in particular the roof covering (1) or facade cladding, essentially in a common plane, in that the at least one solar element, in particular the at least one solar roof tile (80), engages behind the outer leg (57) of the connecting unit (50) with a rear hook section (90) in a form-fitting manner, wherein the connecting unit (50) is arranged between an inner leg (56) and the at least one solar element, in particular the at least one solar roof tile (80), as well as a vertically adjacent solar element,in particular solar roof tile (80), provides a receiving space (60), wherein in the receiving space (60) cabling (100) of the at least one solar element, in particular of the at least one solar roof tile (80), and optionally of at least one adjacent solar element, in particular solar roof tile (80), from the outer skin, in particular the roof skin or the side outer skin of the building, can or is arranged separately.

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