WO1999054670A1

WO1999054670A1 - Construction element for a roof or a wall of a building and method for producing an element of this type

Info

Publication number: WO1999054670A1
Application number: PCT/EP1999/002503
Authority: WO
Inventors: Günter W. LÜTZE
Original assignee: Uti Holding + Management Ag
Priority date: 1998-04-17
Filing date: 1999-04-14
Publication date: 1999-10-28
Also published as: AU4360899A; DE19816980A1; EP1112465A1

Abstract

The invention relates to a construction element (1) for a roof, half-roof or wall of a building (34), comprising a moulded body (3) made of a curable material (19) and a collector system (4) with a space (22) for the passage of heat-transfer fluids. The collector system (4) has a cover part (2) facing outwards whose inward-facing side (10) defines the space (22) and whose outward-facing side (6) faces the outside environment (24). The system is characterized in that the cover part (2) is part of a lost form (27) of the moulded body (3) and becomes irremovably joined to same after curing of the moulded body. The invention also relates to a method for producing such a construction element, especially for a roof, half a roof and a wall.

Description

TITLE OF THE INVENTION

COMPONENT FOR A ROOF OR WALL OF A BUILDING AND METHOD FOR PRODUCING THE SAME

DESCRIPTION

TECHNICAL FIELD The invention relates to a component for a roof, a roof half or a wall of a building according to the preamble of claim 1, comprising a molding compound formed from a hardening material and a collector device with a space for the throughput of heat-transporting fluids, the collector device following one has facing cover part, the inward side of which delimits the space and the outward side of which faces the outside world. The invention further comprises a method for producing such a component of a building, in particular for a roof, a roof half and a wall according to the preamble of claim 12.

STATE OF THE ART

DE-C-4042208 shows a component made of a molding compound for a wall or roof covering. Collector devices for absorbing radiant heat are arranged on the outward-facing surface of the component and are releasably covered by a translucent cover in the manner of a glass plate. On the inwardly facing boundary surface, a reinforced concrete slab is permanently connected to the molding compound as lost formwork. The reinforced concrete slab is arranged as a reinforcement element and gives the structural element additional rigidity and strength.

DE 29 33 952 shows a structural element for walls, roofs or ceilings of buildings made of a molding compound body, which is in each case on its upper flat is covered by a double-sheet arrangement with integrated cavities. The double-sheet arrangement formed as a sandwich form channels which act as a collector device for the component and are provided for the use of solar energy No further function is provided

DE-A-2816970 shows a roof or wall part with an integrated heat exchanger, which is covered on the outside by a cover part and rests on a heat-insulating body. The heat exchanger comprises a sandwich arrangement between which channels are arranged, in which a fluid flows. Several roof or wall parts are connected to each other by a connector, so that a large-scale coverage can be realized

DE-U-91 06 731 shows a device for producing a prefabricated, angularly arranged wall element in a formwork arrangement, which comprise a corner connection and is used as a corner part. The corner connection forms a gable roof which is turned upside down and a counter-form, which is printed on the lower formwork. A liquid polyurethane foam is inserted in the space between the formwork and the counter-form. After curing, the formwork and counter-form are detached from one another. It is not intended to leave a formwork element on the wall element

In general, components with a lost formwork and a molding compound adhering to it are known in practice.For the building industry, a lost formwork is understood to mean a body that is used to limit a molding compound body during casting and then remains on it. The lost formwork remains in places because later it is no longer visible PRESENTATION OF THE INVENTION

The object of the invention is to provide a component according to the preamble of claim 1, the function and application of which goes beyond those of the known arrangements. Furthermore, a manufacturing method according to the preamble of claim 12 is to be specified, which proceeds in a manner that is favorable in terms of production technology. According to a further aspect of the invention, the component is to be produced inexpensively without great assembly effort.

The object with regard to the component is achieved according to the invention with the characterizing features of claims 1 in that the cover part, as part of a lost formwork of the molding compound body, is permanently connected to the molding compound body after it has hardened. The above-mentioned manufacturing method according to the preamble of claim 12 is characterized by the following steps: providing a cover part as outward-facing formwork, arranging a counterform at a distance parallel to the formwork and forming a formwork space, filling the formwork space with a molding compound which has not yet hardened, Hardening the molding compound to form a molding compound and leaving the outer formwork as the cover part of the component.

In the component according to the invention, a cover part, with which the heat transfer from the outside world to a collector device can be used, is used in the manufacturing process of the component, so that formwork material is saved. Assembly work, such as retrofitting a cover part for the collector device, is eliminated. Additional cover parts that protect the collector device against mechanical and weather influences from the outside are no longer required. The lost formwork takes over this function. This component not only protects the collector device against external damage - 4 -

gene in the manufacturing process, but also in its function as a component for the use of solar energy. The outward-facing side of the formwork forms a radiation surface for the thermal energy. The cover part of the component according to the invention offers optimal protection against mechanical, weather or other influences on the component. The component for a roof, a roof half or a wall of a building thus becomes a module which can be produced completely in one production step in a factory and which can be used in many different ways. Because of its compact design, the component can be manufactured very inexpensively in a manner that is favorable in terms of production technology. The component can be manufactured in large numbers at the factory.

A formwork arrangement forming the molding material body is arranged in such a way that at least one formwork is to be provided as a cover part, which remains on the component when the component is removed from the mold. The last method step significantly differentiates the method according to the invention from methods known in practice, in which a formwork part remains as lost formwork on the component, but is no longer visible later. In the arrangement according to the invention, the lost formwork is arranged as a visible part that can also perform important functions after production, such as covering and protective functions against external influences. The collector device can thus be produced together with the cover part in advance of the production of the component, or, as an alternative, can optionally be purchased as a complete component, and is used as formwork material for curing the molding compound body. An additional cover for the space in which the collector device is arranged is no longer required, so that the component is cheaper in terms of weight and cost compared to conventional components.

The molding body of the component advantageously consists of a hardened mineral material such as concrete or rigid foam. Such Materials are pourable or flowable as a not yet hardened molding compound and can be introduced very easily. When the material hardens, a formwork space between the formwork is completely filled with the material. The shape of the component is mainly determined by the molding compound. The component can thus have any possible castable shape, which is pre-shaped by the formwork. Such mineral materials also have the advantage that their physical and chemical properties can be changed by appropriate additives or additives or their composition and can be adapted according to the requirements. Through special treatment steps such as a sonochemical treatment, which prolongs the driving process of a liquid concrete mixture in the manner of a chain reaction, the molding composition is also suitable for components whose dimensions are large and in whose manufacture filling the mold takes a minimum period of time, for example more than a minute. The production method according to the invention is also suitable for the production of moldings in which the liquid concrete mixture is introduced successively into the mold, in particular also discontinuously, since the reaction, in the manner of a chain reaction, causes the material applied in batches to adhere to one another, with no undesirable layer boundaries in the properties of the molding compound adversely affect.

The molding material body preferably has a low density between 30-50 and 1200 kg / m ³ , in which edge areas are virtually non-porous and in which the local density continuously decreases from the edge areas to a central area. This makes it possible to produce a lightweight concrete molded body in a fast production process, which expediently integrates a compact and tensile and pressure-resistant outer reinforcement layer with a porous and light core layer, in which an almost flat surface with a low overall weight is desired. Such a The lightweight concrete body is lightweight, heat and sound insulating, but still stable.

The molding material body can also be a reinforcement support element if the support element is inserted into the liquid molding composition before the end of a setting step. Preferably, a lightweight honeycomb body, e.g. made of polypropylene, which is completely surrounded by the molding compound. This can e.g. consist of rows of tubes made of carbon fiber or polypropylene or of a mesh, grid or truss made of steel or other reinforcing materials. In particular in the design of the molding compound made of lightweight concrete, the installation of glass fibers as reinforcement or reinforcement is advantageous because of the low weight.

In a further embodiment of the invention, the molding material body advantageously has mutually spaced substantially parallel boundary surfaces, one surface being connected to the inward-facing side of the cover part and the other surface being arranged as a support surface for supporting the roof or the wall. In this embodiment, the component according to the invention is constructed in the form of a sandwich, the manufacture and use of which for a building are very diverse. Such sandwiches are such. B. used as a heat exchanger, solar wall or solar roof.

The boundary surfaces can advantageously be formed as a layer. For this purpose, the molding material body is provided with an outer (for the lost formwork) and an inner (for the support) coating, which enables an improved connection of the molding compound body with the lost formwork or with the support. For example, it is possible that the outer coating consists of a soft gel-like mass, such as soft foam. The contact area of this layer with the lost formwork has a rough surface which, with a rough or uneven contact area of the outer formwork, forms an inseparable, firm connection commitment. The connection can advantageously be reinforced by anchors or other separate connecting parts or foaming agents. A foaming agent may neutralize different thermal expansion behavior of the molding compound and the lost formwork if both are made of different materials. The inner boundary layer facing the support can, for example, consist of a glass fiber reinforced lightweight concrete slab and have reinforcements. This boundary layer can also comprise a gypsum board, which is incorporated into the molding compound during manufacture. So that this boundary layer does not adhere to the formwork attached to this side during the production of the component and is possibly destroyed, sliding elements can be applied to this surface, which enable the formwork body to be detached easily.

In the form of a sandwich, the support surface forms the contact surface of the molding compound body with a counter mold as a support for the component. Typically, the counterform is detachable; H. After the molding compound has hardened to form the molding compound, this part is detached from the component. As a further development of the invention, it is advantageous to leave the counterform on the component as an “additional lost formwork”. In this application, this additional lost formwork can supplement the function of the "first", externally directed, lost formwork. This applies in particular to the reinforcement and reinforcement functions of such formwork.

A further advantageous embodiment of the invention is that the lost formwork comprises two formwork panels arranged opposite one another, within the contact surfaces of which the space for the collector device is arranged, and that the inward-facing side of the lost formwork are arranged in flatly distributed recesses or elevations of the molding compound body , which are filled out completely by a liquid molding compound, so that after curing a positive and non-positive - 8th -

Connection of the lost formwork to the molding compound is created, which is very strong and cannot be removed even with strong tensile and compressive loads. The formwork panels optimally protect the collector device against external mechanical and thermal influences. The space can be designed as a tube with a circular cross section or have a square cross section and be designed as a chamber. In particular, the last-mentioned embodiment leads to a relatively flat construction of the component. With this arrangement, the flat collectors that are common today can be installed and used in the component.

The outward-facing side of the component or the lost formwork advantageously has a tile-like or facade-like structuring that cannot be distinguished from a conventional roof or wall of a building. Such structuring is achieved, for example, in the form of roughening. This gives, for example, a solar roof or a solar wall the structure and the usual appearance of a roof or facade, so that such a surface is adapted to the usual different types of roofs or walls without impairing the aesthetics. To improve the optical design of the component, the surface can additionally be adapted to the environment by means of corresponding optically striking structures or by targeted addition of dyes during production. In this case, the component can be used as a replacement or for the repair of a damaged component. After installation, the newly inserted component stands out only slightly from its surroundings. Compared to conventional components with integrated collectors, the component is particularly light, simple to produce, inexpensive and of constant quality and, in particular, less sensitive and susceptible to damage in processing. This results in lower costs per m ² . The construction and assembly effort is significantly simplified. - 9 -

The component can be used particularly advantageously as large-area components for a complete roof, a half of the roof or as a wall, for example if the outer surface has an extent of at least 16 m ² or has an edge length of at least 4 m. The large-area design as a complete roof or wall has the additional advantage that there is no intermediate cooling of the edges in an integrated collector device, ie such areas only occur at the edges of the roof or wall. A large covering area of the component reduces assembly costs on site and saves the costs for connecting elements. This fully functional component makes it possible to use large-area, high-performance collector devices with significantly higher or more differentiated performance than conventional collectors at reduced costs, thus reducing the running energy costs of a building as well as, in particular, the initial equipment costs in relation to comparable services. The full surface use of the entire roof or the entire wall as a solar roof or as a solar wall further compensates for the somewhat low surface efficiency of this component compared to that of a conventional element. With this arrangement, it is possible to manufacture a complete house, assembled from the component, in advance in a factory.

It is advantageous if the lost formwork consists of a heat-absorbing and low-reflection material. In principle, all materials that meet the requirements for optimal heat transfer between the outside world and the collector device in terms of thermal insulation and low reflection are suitable as materials for the surface of the component. The reflectivity can also be achieved by applying an appropriate layer on the outer surface of the formwork, e.g. B can be reduced and influenced in the form of colors on a metal. Materials made of heat-absorbing plastic mixtures can be used as well as metals, preferably stainless steel, copper, aluminum or an alloy - 10 -

can be used from these metals. The absorption effect of a formwork made of this material is particularly light compared to conventional components with integrated collector devices, is simpler to manufacture, inexpensive and of constant quality, and in particular is less sensitive and susceptible to damage, particularly in processing. The formwork can be produced over a large area and is very inexpensive to process. It is also characterized by less reflection, lower costs per m ² , by the elimination of special protection against hailstorms and the like. out. The somewhat lower absorbency of a metal surface of the lost formwork can offer certain advantages in various applications even compared to a glass surface. The metal outer surface or a surface made of a metal alloy produces a lower temperature increase of a heat-dissipating medium in a collector device when exposed to the sun than a glass outer surface. If no heat consuming consumer is connected to the collector device, the so-called standstill temperature for the metal components is lower. Evaporation of the content is prevented, as is the case with conventional glass flat collectors.

A further advantageous development of the invention is when the lost formwork and its counter shape enclose an angle in order to reshape the shape of a gable roof or the corners of two colliding walls of the building. If the two formworks are arranged at the same distance from each other, any angular component can be manufactured. With this arrangement, a complete roof or the corner connection of two walls can be produced in one production step, so that assembly work for assembling two roof parts or joining two walls is no longer necessary. If the angles are arranged differently one behind the other, the formwork forms an arc. It can also be used to produce arched components with lost formwork. Especially in the production of - 11 -

Nes roof further advantageous configurations of the component according to the invention result from at least one lost formwork. For example, an oval shape of the lost formwork in connection with a triangular shape of the counter shape is advantageous for the re-shaping of certain roof shapes.

For the manufacture of a gable roof or two colliding walls, two manufacturing processes are advantageous, in a first process the cover part as a lost formwork and the counterform simulating a gable roof turned upside down. The lost formwork is at the bottom and the counter form at the top. After curing, the counter mold can be pulled upwards away from the molding compound body, and the finished cast (upside down) gable roof can be turned into the correct position, in which it can be placed on a building as a roof. This manufacturing process is advantageous if the roof is manufactured separately from other parts of the building and is then to be placed on the outer walls of the building or transported separately.

In an alternative to the method described above, the lost formwork and the counterform simulate the shape of a triangle open at the bottom or directly a gable roof, the lost formwork being arranged at the top and the counterform at the bottom. Through this manufacturing process, the lost formwork and thus the cover part is arranged on the outside as an outer formwork. The counter form supports the molding compound as an inner formwork. Both formwork must also be sealed at the open (lower) ends of the gable roof. The formwork space thus formed is filled with liquid molding compound by a special device. After curing, the inner formwork is pulled down from the inside out. The outer formwork with the molding compound remains as a roof or roof part on the building. This approach is useful if the roof is made together with the walls of the building - 12 -

A separate transport of a cast roof and its assembly on the side walls of the building is therefore unnecessary.

The alternative methods for producing a roof described above can be carried out almost automatically and can be implemented in terms of production technology without great expense. It can be used to combine two or more components to form a complete component. This arrangement is advantageous in the production of walls of a building if two walls of the building are produced at the same time. In this way, two or more walls, preferably finished at right angles to one another, can be joined to form a square or another structure.

In the manufacture of solar roofs with an integrated collector device, it is advantageous if, as the lost formwork, the outer surface of a gable roof and the counterform inward simulate another formwork part flattened towards the top of the gable roof. This formwork part and the counterform together form a parallelogram with an open baseline. Above the flattened formwork part, facing the roof top, this creates a chamber-shaped cavity in the shape of a triangle. If this cavity is prevented from filling up when additional molding parts are poured into the molding compound, this chamber can be used to collect liquids, such as rain or snow, in the finished roof. This liquid serves as a store for the heat-transporting fluids and can thus be connected to the collector device and used for heat use.

Further advantageous developments of the invention can be found in the subclaims and in the description below.

The invention is explained below with reference to the accompanying drawings using an exemplary embodiment.

BRIEF DESCRIPTION OF THE DRAWING - 13 -

Fig. 1 shows a perspective view of an embodiment of a component according to the invention with a lost formwork.

FIG. 2 shows an enlarged detail II of FIG. 1.

Fig. 3 shows a further detail of a lost formwork, seen in perspective from below.

FIG. 4 shows a side view of a first production method for the exemplary embodiment according to FIG. 1.

FIG. 5 shows a side view of an alternative production method for the exemplary embodiment according to FIG. 1.

DESCRIPTION OF PREFERRED EMBODIMENTS OF THE

1 shows a perspective illustration of a component 1 according to the invention being used as the roof 30 of a building 34. The roof 30 can be removed from the building 34 and, as described in more detail in FIG. 4 or 5, is formed using a formwork 27 and their counter-mold 26 and a molding compound 19 hardened between the formwork. Alternatively, the roof 30 can be made together with the building, as shown and described in FIG. 5. The roof 30 is a solar roof, ie collector devices 4 are integrated in the roof and are covered by a cover part 2. The heat radiating from the outside world 24 to an outward side 6 of the cover part 2 is collected in the collector device 4 and can be used in the building 34. The roof 30 shows a roof covering 32 with an outward-facing side 6, which reshapes roof tiles 36, so that such a roof cannot be distinguished from a conventional roof which is covered with roof tiles. The roof covering 32 forms the formwork 27 of the component 1, which has remained on the component 1 as lost formwork 2 after the production of the component. The cover part 2 lies on a shaped - 14 -

mass body 3 and is permanently attached to it. To utilize the thermal energy collected by the collector device 4, connection parts for consumers in the building 34 are necessary on the collector device. For reasons of clarity, these parts have not been shown in FIG. 1. The component 1 lies on a roof support 15, which form rafters or a similar base for the roof. The support 15 can also comprise a further additional lost formwork, which is not detached from the component 1 after completion and remains on the component.

Fig. 2 shows a detail of Fig. 1 in an enlargement, from which details of the component 1 can be seen. The roof covering 32 used as lost formwork 2 is arranged at the top in FIG. 2 and in each case comprises two formwork parts 20a, 20b arranged firmly against one another, one part 20a of which is arranged above and the other part 20b below. Both formwork parts 20a, 20b are connected to one another by a force and positive connection 14. The upper formwork part 20a shows triangular recesses 35 to the outside, which form part of a roof tile 36 of a roof 30. The lower formwork part 20b shows recesses 12 and corresponding elevations 13 directed inward in the direction of the molding compound body 3, each of which encloses on its contact surfaces a space 22 designed as a channel 21, in which a fluid 5 for the collector device 4 of the component 1 can flow. An inward side 10 of the cover part 2 lies on an upper boundary surface 9 of the molding compound body 3. A lower boundary surface 8 delimits the molding compound body inwards. These surfaces 8, 9 are designed as inner and outer layers 16, 17 for better connection to the cover part or the support 15 and as thermal compensation. The inner boundary layer 17 consists of a molding compound which is softer than the molding compound, such as a foam layer or an oil-containing slip. To improve the connection of the cover part with the molding material body 3 are - 15 -

Anchor 28 arranged. In the interior of the molding compound 3, a reinforcement 7 can also be seen in the form of tubes and a reinforcement scrim made of steel parts. The lower boundary layer 16 consists of a plasterboard 45 and serves as a base 43 which delimits the roof inwards.

Fig. 3 shows the two formwork parts 20a and 20b of the cover part 2 separately without adhering molding material body 3 in a perspective view from below, the lower formwork part 20b shown in Fig. 2 above, while the outward side 6 of the upper formwork part 20a is shown below and has a triangular structure 35 that reshapes roof tiles 36. The inward-facing side 10 of the cover part 2 has, in a distributed manner, quadrangular elevations 37 which engage in the corresponding recesses 12 (see FIG. 2) of the molding compound body 3. The lower formwork part 20b has a smooth, continuous surface between the two triangular structural elevations 35. Distributed over the surfaces, the two formwork parts 20a, 20b form the space 22 for the collector device from FIG. 2 at their contact surfaces. The space 22 has a continuous connection and forms the channel 21 for guiding the fluid 5.

FIG. 4 shows a side view of a first manufacturing method for the roof 30 of the building 34 according to FIG. 1. A frame 38 is shown, on which a formwork 27 with its counterform 26 are arranged parallel to one another. The formwork 27 is arranged at the bottom in FIG. 4 and remains later than lost formwork 2 on the component 1 (see FIG. 1). In the formwork 27, the collector device 4 is already installed, so that in this function it covers both the roof covering 32 for the roof 30 of the building 34 and the cover part 2 (FIG. 2). The roof will later be placed on building 34 (Fig.l). The counter mold 26, which is arranged at the top in FIG. 4, closes off the component at the top. Both formworks thus form a gable roof 30 which is turned upside down and encloses an angle α. With a special filling device 39, the liquid or soft - 16 -

Molding compound 19 is poured into a formwork space 42 of the formwork 27 and its counterform 26. After the molding compound has hardened, the counterform 26 is pulled upward in the direction of the arrow. The formwork 27 arranged below adheres to the component 1 as lost formwork. The arrangement is then released from the frame 38, rotated through 180 ° and can then be placed on the side walls of the building.

5 shows a side view of an alternative manufacturing method for the roof 30 of the building 34 corresponding to FIG. 1. This manufacturing method is particularly useful when the roof 30 and the side walls 40 form a unit, that is to say the roof together with the walls of the building Building should be manufactured in one operation. After completion of side walls 40 of the building 34, a formwork arrangement for the roof, which encloses an angle, is placed on the upper edge 41 thereof. The formwork arrangement consists of the formwork 27 forming the roof covering 32 and the counterform 26. In this case, since the roof 30 is no longer changed in its later position, the formwork 27 is arranged on the outside and the counterform 26 is arranged on the inside. With the filling device 39 already mentioned above, the liquid molding compound 19 is introduced into the formwork space 42 between the formwork. So that the liquid molding compound 19 cannot flow out of the formwork space 42 downwards, the intermediate space 42 must be sealed downward in the region of the upper edge 41 of the side walls 40 with a seal 33. After the molding compound 19 has hardened into a solid molding compound body, the counterform 26 is pulled downward in the direction of the arrow. The roof 32 of the building 34 remains in the position shown and need no longer be changed.

Claims

- 17 - PATENT CLAIMS

1. component for a roof, a roof half or a wall of a building (34), comprising a molding material body (3) formed from hardening material and a collector device (4) with a space (22) for the throughput of heat-transporting fluids (5), wherein the collector device (4) has an outwardly facing cover part (2), the inward side (10) of which defines the space (22) and the outward side (6) is facing the outside world (24), characterized in that Cover part (2) as part of a lost formwork (27) of the molding compound body (3) after the curing of the molding compound body (3) is permanently connected to it.

2. Component according to claim 1, characterized in that the molding body (3) is a hardened mineral material z. B. concrete or rigid foam.

3. Component according to claim 1 or 2, characterized in that within the molding body (3) and parallel to the lost formwork (27) a reinforcement (7) is arranged.

4. Component according to one of claims 1 to 3, characterized in that the molding body (3) spaced from each other, substantially parallel boundary surfaces (8, 9), wherein a boundary surface (9) with the inward-facing side of the cover part (2) is connected, and the other boundary surface (8) is arranged as a support surface for a support (15). - 18 -

5. The component according to claim 4, characterized in that the boundary surfaces (8, 9) comprise layers (16, 17) which have a higher density than the molding body (3).

6. The component according to claim 4 or 5, characterized in that the support (15) is detachably arranged as additional formwork on the component.

7. Component according to one of claims 1 to 6, characterized in that the lost formwork (2) comprises two mutually arranged formwork panels (20a, 20b), within the contact surfaces of which the space (22) for the collector device (4) is arranged, and that the inward side (10) of the lost formwork (27) are arranged in flat recesses (12) or elevations (13) of the molding compound body.

8. Component according to one of claims 1 to 7, characterized in that the outward-facing side (6) of the cover part (2) has a tile-like or facade-like structure, which cannot be distinguished from a conventional roof (30) or a wall is.

9. Component according to one of claims 1 to 8, characterized in that the lost formwork (27) consists of a heat-absorbing and low-reflection material.

10. The component according to one of claims 1 to 9, characterized in that the lost formwork (27) includes an angle α, which has the shape of a gable roof (30) or the corners of two colliding walls of the building (34) and the support (15) at a distance from the lost formwork (2) is arranged as a counter-shape (26). - 19 -

11. The component according to claim 10, characterized in that the counter-shape (26) in the gable area or in the corner area has a horizontal cross strut, and between the cross strut and the gable or the corner a free of the molding body 13 is arranged, which with the collector device is connected by line and can be used as a memory for the thermally conductive fluid.

12. A method for producing a component (1) of a building (34), in particular for a roof (30), a roof half and a wall according to one of claims 1 to 11, characterized by the following steps: a) providing a cover part (2) as outward-facing formwork (27), b) arranging a counterform (26) at a distance parallel to the formwork (27) and forming a formwork space (42), c) filling the formwork space (42) with a molding compound (19) that has not yet hardened , d) hardening the molding compound (19) to a molding compound body (3) and remaining the outer formwork (27) as a cover part of the component (1).

13. The method according to claim 12, characterized in that the counter-mold (26) is released from the component after hardening.

14. The method according to claim 12 or 13, characterized in that the lost formwork (27) and the counterform (26) are arranged to form an angular formwork arrangement, so that it simulates a gable roof (30) or a corner connection of the building (34) . - 20 -

15. The method according to claim 14, characterized in that the counter mold (26) is arranged to the bottom and is pulled downwards.

16. The method according to claim 14, characterized in that the lost formwork (2) is arranged to the underside and a gable roof placed on its head (30) or a corresponding corner connection of a wall simulates the lost formwork (27) and the counterform ( 26) are sealed at their open end, and that the counter mold (26) is pulled upwards.

17. Building part, such as a roof, a roof half or a wall comprising at least two components produced by one of the methods according to claims 12 to 16 and then joined together according to one of claims 1 to 11.