Procedure for installing insulating boards

Abstract

The invention relates to a method for fixing at least one insulating panel (1, 2) to a substrate (9), comprising the following steps: providing an adhesive foam (10), applying the adhesive foam to a surface (5, 6) of the insulating panel (1, 2) to be bonded and / or to the substrate (9) to be bonded to the insulating panel (1, 2), bringing the surface (5, 6) of the insulating panel (1, 2) to be bonded into contact with the substrate (9), fixing the insulating panel (1, 2) to be bonded to the substrate (9) by means of at least one fixing agent, wherein the fixing agent has two legs (11, 12), and for fixing the insulating panel (1, 2) the first leg (11) is attached to the substrate (9), and the second leg (12) is attached to the insulating panel (1, 2), curing the adhesive foam located between the insulating panel (1, 2) and the substrate (9), wherein the legs (11 / 12) The fixing elements are pivotable to each other.The invention also relates to a damping system that can be obtained by the method described in the invention.

Description

[0001] The present invention relates to a method for attaching at least one insulation board to a substrate, comprising the steps of providing an adhesive, applying the adhesive to a surface of the insulation board to be bonded and / or to the substrate to be bonded to the insulation board, bringing the surface of the insulation board to be bonded into contact with the substrate, and curing the adhesive located between the insulation board and the substrate. The invention further relates to a thermal insulation system that can be produced using the method according to the invention.

[0002] These methods are used, for example, in the thermal insulation of buildings, where the insulation panels are attached to the exterior walls. Such insulation panels are also used for interior insulation. One application example is the wall or ceiling insulation of basements. It is also possible to incorporate these insulation panels into prefabricated or timber frame construction. In these cases, the insulation panels can be prefabricated. These types of insulation panels are also used for the renovation or over-insulation of damaged insulation systems.

[0003] The insulation boards are used to create a thermal insulation composite system (ETICS). When insulating buildings with ETICS on both old and new structures, the insulation boards are typically bonded to the substrate using mineral-based or mineral-based and organically modified adhesives with a lime / cement binder base. The adhesives are delivered to the site of use (construction site or industrial production facility) in bags or silos and mixed with water before application. Mixing can be done manually, with a mixer, or with continuous or forced-action mixers.

[0004] The adhesive is then typically applied to the insulation boards, usually by hand, though less frequently mechanically using a pump. The insulation boards are then bonded to the substrate by pressing the bonding surface of the boards into contact with the substrate. The adhesive facilitates this contact between the insulation boards and the substrate. Occasionally, the adhesive is sprayed onto the substrate using a pump. In this case, the insulation boards are placed into the wet adhesive bed. The adhesive is then allowed to cure.

[0005] In some cases, organically bound adhesives are also used, to which cement is added before application to allow them to set. These are usually applied by hand to the insulation boards, and occasionally also to the substrate.

[0006] It is also possible to bond insulation boards with organically bound adhesives without the addition of cement. These adhesives are then applied to the insulation boards or the substrate either manually or mechanically using pumps.

[0007] The adhesive materials typically used are described, for example, in leaflet no. 21 of the Federal Committee for Color and Property Protection (BFS), "Technical Guidelines for the Processing of External Thermal Insulation Composite Systems", dated October 1995, paragraphs 2.3.1 and 2.4.1.

[0008] In the aforementioned information sheet No. 21, section 2.5.2.1 also describes the application of the adhesive to the insulation board. Technical System Information No. 3, "External Thermal Insulation Composite Systems: System Diversity," published by the German Association for External Thermal Insulation Composite Systems (VETICS), page 7, further describes possible materials and methods for bonding insulation boards.

[0009] Currently, approximately 30 million square meters of insulation boards are bonded annually in Germany alone. Using conventional bonding methods, this means that roughly 120-150 million kg of adhesive must be produced, transported, mixed, and applied annually in Germany alone.

[0010] This involves a very high logistical and time commitment, which in turn leads to high costs. Furthermore, conventional adhesives require a comparatively long curing time, for example, through drying. Therefore, before any further processing of an ETICS (External Thermal Insulation Composite System), such as sanding, anchoring, or reinforcing the insulation layer, waiting times of at least three days are typically required. This reduces the productivity of conventional bonding methods.

[0011] On numerous substrates, particularly old coatings found on older buildings or in basements, cement-based and / or water-based adhesives pose a risk of undesirable interactions between the adhesive and the substrate in the form of saponification or softening. Saponification occurs when existing coatings are not alkali-resistant and are damaged by the high alkalinity of a cement-based adhesive. If coatings are not sufficiently moisture-resistant, they can also soften under the influence of the water content in the adhesive. Both can result in a loss of bond strength between the adhesive and the substrate. Consequently, the ETICS (External Thermal Insulation Composite System) also exhibits insufficient bond strength. This can lead to damage to the ETICS, potentially resulting in a loss of structural stability.

[0012] The problems described above have already been satisfactorily solved by using adhesive foam as the adhesive. EP 1 640 521 A1 describes a method in which insulation boards are attached to a substrate using adhesive foam. To precisely fix the insulation boards in the desired position relative to the substrate in this method, the use of a fixing agent is proposed. This fixing agent has two legs arranged at an angle to each other; to fix the insulation board, the first leg is attached to the substrate and the second leg to the insulation board.

[0013] Based on the prior art described above, the invention aimed to further reduce the workload, particularly the logistical and time-related costs, of bonding insulation boards to a substrate, while simultaneously increasing productivity. In particular, the use of adhesives for fixing the insulation boards to the substrate is to be simplified.

[0014] For a method of the type mentioned above, the invention solves the problem by using a fixing means with legs that can be pivoted relative to each other, wherein a restoring force is generated when the legs are pivoted relative to each other, wherein the legs can be pivoted relative to each other in an angular range of +70° to -150°, wherein the sign "+" means that the legs move towards each other and the sign "-",that the legs move away from each other and the fixing agent contains a flexible material, wherein an elastomer is used as the flexible material. The object of the invention is further achieved by using such a fixing agent in a method of the type mentioned at the outset.

[0015] According to the invention, a fixing device with legs that can pivot relative to each other is used. The use of such a fixing device enables precise fixing of the insulation boards in the desired position relative to the substrate and to the adjacent boards. In particular, the fixing device serves for the temporary fixing of the insulation boards to the substrate, namely until the adhesive foam has fully hardened, at which point it takes over the holding and fixing function of the insulation boards.

[0016] The fixing agent allows the insulation panels to be easily and perfectly plumb and leveled, for example, on a building facade. Furthermore, the fixing agent can also be used to compensate for unevenness in the substrate.

[0017] Furthermore, the use of the fixing agent can reliably prevent post-expansion of the adhesive foam perpendicular to the substrate and thus prevent the insulation boards from being pushed away from the substrate.

[0018] A key feature of the fixing element is the pivotability of its legs. This pivotability allows for particularly simple and flexible fixing of the insulation panel. For example, the inventive method makes it possible to securely and easily fix insulation panels that are not perfectly aligned with the fixing element, since the legs of the fixing element can be easily adjusted to the respective position of the insulation panel and attached to it.

[0019] The degree of pivotability of the legs relative to each other can vary widely. In principle, the legs can pivot relative to each other within an angle range of +90° to -180°. Here, the sign "+" indicates that the legs move towards each other, and the sign "-" indicates that the legs move away from each other.

[0020] It is advantageous to attach the first and / or second leg of the fixing device to the substrate or the insulation board using one or more fasteners.

[0021] The first leg can be easily attached to the substrate using an adhesive, particularly double-sided tape. This simplifies the attachment process. Naturally, any suitable adhesive can be used. High-viscosity adhesives, especially gel adhesives, are particularly well-suited. Acrylic-based gel adhesives exhibit especially good performance characteristics. The thick adhesive layer of these types, several millimeters thick, enables excellent bonding results on both smooth and textured surfaces.

[0022] According to a preferred embodiment of the invention, the connection between the fixing agent and the substrate is made exclusively by gluing, in particular by means of double-sided adhesive tape.

[0023] To achieve a particularly secure and durable attachment of the first leg to the substrate, it is also possible to fasten it using mechanical anchoring. Mechanical anchoring can be used as an alternative to, or in addition to, gluing the leg. Mechanical anchoring is particularly advantageous for substrates that are unsuitable or only partially suitable for gluing. Suitable materials for mechanical anchoring include nails or screws, possibly using appropriate anchors.

[0024] A pin, especially a nail, can be pressed through the second leg and into the insulation board in a particularly simple and practical way. The second leg can have a suitable hole for this purpose. This provides a simple and secure way to fasten the second leg to the insulation board. The pin can be made of plastic or metal, and in particular, a plastic or metal nail.

[0025] However, other fastening methods are also conceivable in principle.

[0026] According to another particularly practical embodiment, the second leg can be attached to the insulation board if the second leg has at least one pin and / or cutting edge that is pressed into the insulation board to secure it. With the materials commonly used for insulation boards, pressing in the pin is straightforward. A particularly stable attachment can be achieved if the pins and / or cutting edges are arranged in a flat pattern on the first and / or second leg.

[0027] The respective method for attaching the second leg to the insulation board ensures a secure and durable fastening of the second leg to the insulation board, thus securely fixing the insulation board to the substrate until the foam expansion and curing are complete. In particular, a force-fit connection between the second leg and the insulation board can be achieved.

[0028] According to a particularly preferred embodiment of the invention, the fastening means are integrally connected with at least one leg. The use of such a fixing means represents a significant simplification of the work, as it eliminates the need to provide and attach fasteners while fixing the insulation boards to the substrate. An even greater simplification of the work is achieved when using fixing means in which both legs are integrally connected with fasteners. In this embodiment, it is not necessary to separately select and connect fasteners to the fixing means. This time saving is particularly relevant when applying the method according to the invention in areas that are difficult to access or when laying insulation boards in a horizontal position, such as on ceilings.

[0029] In the aforementioned embodiment, in which the fastening means are integrally connected to the legs, the feature of the invention—the pivotability of both legs—proves particularly advantageous. Attaching a fixing device that has rigid legs and fastening means integrally connected to the legs is often difficult. In this case, the fastening of the legs to the substrate and the insulation board must occur essentially simultaneously, making it necessary to position the fixing device as precisely as possible before fastening. This is usually difficult, especially with protruding fastening means.

[0030] Due to the use of a fixing device with pivotable legs, the aforementioned problem does not occur in the method according to the invention. Because the legs are pivotable, it is possible according to the invention to press both legs together before fastening and to attach them sequentially to the substrate and the insulation board. This eliminates the need to position both legs of the fixing device simultaneously and significantly simplifies the fastening process.

[0031] A fixing of the insulation board according to the invention can be achieved if a restoring force develops when the legs of the fixing device are pivoted relative to each other. The fixing device exhibits a certain degree of dimensional stability. The development of this restoring force has the advantage of facilitating the attachment of the fasteners to the substrate or insulation board. This approach is particularly advantageous when fixing devices with protruding fasteners, such as prongs and / or cutting edges, are used. In this case, the restoring force facilitates pressing the fasteners into the substrate or insulation board.

[0032] The fixing agents can be designed to be reusable. This allows the fixing agents to be removed from the insulation boards after the adhesive foam has cured. Of course, removing the fixing agents without subsequent reuse is also possible.

[0033] According to one embodiment of the invention, the pivotability of the legs is achieved by using a fixing element that contains at least one flexible material. The proportion of flexible material in the fixing element can vary depending on the desired pivotability of the legs. It is also possible for the flexible material to be provided only in parts of the fixing element, such as only in the connection area of ​​the two legs. However, it is also conceivable that the fixing element consists entirely of the flexible material.

[0034] Various materials can be used as flexible materials. According to the invention, elastomers are used, preferably a thermoplastic elastomer (TPE), in particular an elastomer containing polyvinyl chloride, thermoplastic polyurethane elastomer (TPU), or ethylene propylene diene monomer (EPDM).

[0035] According to a particularly preferred embodiment of the invention, the fixing element has legs arranged at an angle, at least before it is attached. The stability of such an angled arrangement, while simultaneously allowing the legs to pivot, is achieved according to the invention by the fixing element containing a flexible material. The angled leg arrangement enables particularly secure and easy fixing of the insulation boards to the substrate. If the legs are arranged at right angles, fixing is further simplified for the cuboid insulation boards that are typically glued in place.

[0036] The second leg can be attached to a side edge of the insulation board in a particularly simple way. This simplifies the attachment of the leg to the insulation board, especially when the legs are arranged at right angles.

[0037] A recess for the second leg can be provided in the lateral edge of the insulation board to be attached with the second leg. The recess can, in particular, correspond to the dimensions of the second leg. It is also conceivable, of course, to provide the recess with dimensions different from those of the leg if this seems expedient. For example, the recess can be provided across the entire surface of the lateral edge of the insulation board to be attached with the second leg. In this way, when several boards are bonded to the substrate, a gap is created in the area of ​​the lateral edge of the insulation board to be attached with the second leg. Such a design allows for flexible adaptation to different fixing agents. By providing a recess, the second leg can be made invisible from the surface when attached.Especially when multiple insulation boards are glued together, this method allows for a seamless bond despite the second leg located between the edges. A closed joint is achieved, preventing unwanted heat loss through any gaps between the boards. Both the visual appearance and the technical performance of the insulation system can thus be achieved or improved.

[0038] The indentation can be created, for example, by melting or cutting material out of the insulation boards. The indentation may also be present in the insulation boards as delivered.

[0039] If the insulation panels are attached to a building facade, for example, the fixing agent, especially if it has two legs arranged at an angle, specifically at right angles, to each other, can be used in a particularly useful way for supporting insulation panels in the lintel area of ​​openings, for attaching the insulation panels above the base area or laterally for detailing in the area of ​​window sills or similar.

[0040] According to another practical design, several insulation panels can be glued to the substrate. This achieves comprehensive insulation of, for example, a building.

[0041] To simplify the installation of insulation panels, and also from an environmental perspective, it is desirable to limit the number of fixing agents required. For this purpose, when several insulation panels are to be bonded, it can be arranged that two panels are fixed to the substrate using at least one common fixing agent. The two panels to be bonded are positioned adjacent to each other. This design reduces the number of fixing agents required.

[0042] The common fixing means can have two legs designed to pivot relative to each other, the legs preferably being arranged at an angle, in particular at right angles to each other, and the first leg being attached to the substrate and the second leg being attached to both insulation panels to fix the insulation panels.

[0043] The second leg may have fastening means arranged on both sides of the leg, for example pins protruding from both sides of the leg, in particular spikes, nails, cutting edges, etc.

[0044] A particularly preferred arrangement according to the invention is one in which the second leg has flat pins and / or cutting edges arranged on both sides. However, it is also conceivable that only a pin is provided, which passes through the leg and thus projects from both sides of the leg. For fixing, in this case, the second leg is first attached to the first of the two insulation panels by pressing the fastening element provided on one side of the leg into the insulation panel. Subsequently, the second insulation panel is brought so that one of its sides is largely in contact with the side of the first insulation panel attached by the leg, and the fastening element projecting from the free side of the leg is pressed into the second insulation panel. In this case, when the insulation panels are attached, the second leg is thus arranged between the adjacent insulation panels.

[0045] According to an alternative design, it is conceivable that the second leg of the common fixing agent extends across the boundary between the adjacent insulation panels to be bonded.

[0046] To attach the second leg to the insulation boards, two pins, in particular two nails, can be pressed through the second leg and into both insulation boards. The second leg can have two holes, preferably arranged along its width, for this purpose.

[0047] The second leg can also have at least two prongs and / or cutting edges, preferably arranged in a planar configuration, which are pressed into the insulation panels to fasten the second leg to the two insulation panels. The prongs and / or cutting edges can be arranged, in particular, along the width of the second leg.

[0048] According to a particularly practical design, both legs each have an adhesive, in particular double-sided adhesive tape, as a fastening means.

[0049] When bonding multiple insulation boards, the boards can be connected to the substrate using fasteners provided at least along their longitudinal edges. This further simplifies the installation of the external thermal insulation composite system (ETICS). Furthermore, the bonded insulation boards exhibit improved cohesion due to the fasteners.

[0050] It is possible that, as an alternative or in addition to the longitudinal edges, fasteners are also provided on the transverse edges.

[0051] In principle, the insulation panels can be joined together using all known connecting means, for example a stepped rebate or a circumferential groove.

[0052] In a particularly practical design, the insulation boards can be joined together using an interlocking system. For this purpose, the edges of the insulation boards to be joined have corresponding interlocking elements. In principle, all known interlocking elements are suitable. For example, the connecting elements can be serrated, corrugated, grooved, or otherwise designed.

[0053] The insulation boards can also be joined together using a tongue and groove connection. For this purpose, the edges of the insulation boards to be joined have a corresponding tongue and groove. This design ensures a particularly secure connection between the insulation boards.

[0054] In principle, it is possible to combine different connecting elements if this seems appropriate.

[0055] The fixing agent described above can be used effectively in conjunction with adhesive foam. Such foam is characterized by its excellent adhesive strength. Using adhesive foam allows for significantly lower costs when bonding insulation boards to the substrate. Compared to conventional adhesives, transporting adhesive foam is faster and more economical. Mixing the adhesive on-site is also unnecessary, as the adhesive foam can be delivered already prepared in the required composition for bonding. Therefore, processing the adhesive foam is quick, clean, and easy. Furthermore, the adhesive foam used according to the invention cures faster than conventional adhesives, enabling rapid further processing of the external thermal insulation composite system (ETICS).

[0056] Furthermore, the use of adhesive foam does not result in any interactions with the substrate that are detrimental to bond strength. This ensures secure bonding and reliable adhesion of the external thermal insulation composite system (ETICS). The risk of damage to the ETICS is thus significantly reduced according to the invention. In addition, the use of adhesive foam improves the insulating properties of the ETICS compared to the prior art.

[0057] According to the invention, it is generally possible to process the adhesive foam manually or mechanically. In mechanical processing, the adhesive foam is usually conveyed to the surfaces to be bonded via a hose.

[0058] In principle, all known insulation boards suitable for use in external thermal insulation composite systems (ETICS) or other insulation systems can be bonded. This applies regardless of their quality (e.g., strength, weight, density, lambda value, color), layer thickness, dimensions (length and width), edge finish, or surface texture. Examples of possible board materials include expanded polystyrene rigid foam (EPS, block foamed or machine-made), extruded polystyrene rigid foam (XPS), polyurethane foam (PUR), polyisocyanurate (PIR), mineral wool and rock wool (also in lamella form), mineral foam (calcium silicate), phenolic resin (PF) rigid foam, vacuum insulation panels (VIP), wood wool, wood fiber, cork, hemp, sheep's wool, etc. Furthermore, any combination of board materials, for example, in two- or multi-layer arrangements, is also conceivable.It is possible that the insulation boards, acting as a vapor barrier, have a coating or facing, particularly on one side, made of materials such as plastic or aluminum. Naturally, the insulation boards can also provide improved sound insulation, either as an alternative or in addition to thermal insulation.

[0059] According to the invention, the sequence of the process steps is not fixed. This applies in particular to the steps of applying the adhesive foam and bringing the insulation board into contact with the substrate.

[0060] The adhesive foam can be applied to the surface of the insulation board to be bonded and / or to the substrate before the surface of the insulation board is brought into contact with the substrate. In this way, the application of the adhesive can be carried out in a particularly simple manner, using methods known per se.

[0061] The adhesive foam can be applied to each insulation board to be bonded. Application can be carried out, for example, using the well-known edge-bead-dot method or the edge-bead-bead method. The insulation board is then brought into contact with the substrate, with the surface to be bonded facing down. However, it is also possible to apply the adhesive foam to the substrate before bringing the insulation board into contact with it. Of course, it is also possible to apply the adhesive foam to both the insulation board and the substrate to achieve an even more uniform and complete distribution of the adhesive between the insulation board and the substrate.

[0062] Applying the adhesive foam to the insulation board or the substrate before the insulation board is attached to the substrate prevents the bonded insulation boards from shifting due to expansion or post-expansion of the adhesive foam between the insulation board and the substrate. As mentioned previously, expansion or post-expansion of the adhesive foam can lead to uncontrolled pressure and detachment of the insulation boards from the substrate. This design reliably prevents this because, by fixing the desired position of the insulation board relative to the substrate and adjacent boards, any expansion or post-expansion that may occur is limited to the area parallel to the substrate.

[0063] It is also conceivable that the adhesive foam is applied to the surface of the insulation board to be bonded and / or to the substrate after the surface of the insulation board to be bonded has been brought into contact with the substrate. In this case, the insulation board is already in its position on the substrate intended for bonding. The adhesive foam is thus applied between the substrate and the insulation board already positioned on it. This reliably prevents premature hardening of the adhesive foam. Furthermore, the adhesive foam can be applied safely and precisely in the required quantity. With this design, the insulation board can be mounted on the substrate with a gap. The adhesive foam can then be applied to the space created by the gap between the insulation board and the substrate.

[0064] When the adhesive foam is applied between the insulation board and the substrate after it has been brought into contact with the substrate, the fixing agent ensures that the insulation board is held precisely and securely in place on the substrate before the adhesive foam is applied. After the adhesive foam has been applied between the insulation board and the substrate, the fixing agent again reliably prevents the insulation board from being pushed out of place by further expansion of the adhesive foam perpendicular to the substrate.

[0065] To facilitate the application of adhesive foam between the insulation board and the substrate, the foam can be injected between the bonding surface of the insulation board and the substrate using an injection device. For example, the foam can be conveyed through a spray tube inserted through the insulation board. When bonding multiple insulation boards, the foam can also be injected through joints between adjacent boards. To ensure proper adhesion, the foam can be injected at predetermined points at regular intervals between the insulation board and the substrate. Any holes created in the insulation board by the injection device, or preferably pre-made holes, can be sealed by the device dispensing more foam as it is withdrawn from the board.

[0066] According to a preferred embodiment, the adhesive foam can be supplied in compressed form. In this case, the adhesive foam only expands upon exiting the storage container and being applied to the surface to be bonded on site. This design further reduces logistical effort, as the volume of adhesive foam to be transported is further reduced. So-called "on-site foams," which are only processed at the place of use, are particularly suitable. For particularly easy processing and to limit the post-expansion of the applied adhesive foam, the foam can be low-expansion. Preferably, it exhibits a maximum post-expansion of 1 to 30%, particularly 5 to 20%, and especially 8 to 15%.

[0067] So-called partially collapsible adhesive foams have proven particularly suitable. With these foams, the volume of the foam applied to the insulation board or substrate decreases by a specific percentage within a defined time interval. Foams with a volume reduction of 1 to 30%, preferably 5 to 20%, and especially 7 to 15% are preferred. This volume reduction preferably occurs within 1 to 30 seconds, preferably 3 to 20 seconds, and especially 5 to 10 seconds. Like any adhesive foam, partially collapsible adhesive foams also gradually increase in volume during the curing process. It has been shown that partially collapsible adhesive foams exhibit less volume expansion during curing, which is advantageous for fastening the insulation boards.Preferably, adhesive foams are used whose volume expansion from uncured to fully cured state is a maximum of 30%, in particular a maximum of 20% and particularly preferably a maximum of 5 to 10%.

[0068] The particular advantage of these adhesive foams is that uncontrolled pushing of the insulation board from the substrate or subsequent bulging of the insulation board is avoided in every case.

[0069] In principle, all known methods for curing adhesives are possible according to the invention.

[0070] Depending on the type of adhesive foam used, it can be cured very easily over a drying period. No further processing steps are required for curing. It is simply necessary to wait for the shorter drying time of the adhesive foam compared to previous methods.

[0071] However, it is also possible to cure the adhesive foam using UV radiation. This can further reduce the required curing time. UV radiation can be used as an alternative or in addition to curing via a drying period.

[0072] In principle, according to the invention, it is conceivable to use all known one-component adhesive foams or multi-component, and in particular two-component, adhesive foams. Two-component adhesive foams are preferred, especially for machine processing of the foam. The adhesive foam can be colored to facilitate monitoring during processing and to verify that the correct adhesive foam has been used.

[0073] According to a preferred embodiment, an organic adhesive foam can be used. Organic adhesive foams are characterized by particularly good adhesive strength and processability.

[0074] It is particularly conceivable to use a polyurethane-based adhesive foam. Such PUR foams are produced in large quantities and are inexpensive to obtain.

[0075] Furthermore, these foams exhibit particularly good adhesive strength and processability.

[0076] Depending on the desired properties of the adhesive foam, it is also conceivable to use other single- or multi-component, especially two-component, foams, for example based on phenolic resin (PF), latex, polyethylene, polyester, polyisocyanurate (PIR), etc.

[0077] According to a preferred embodiment, the adhesive foam can exhibit a thermal conductivity in the range of 0.020 to 0.060 W / (m·K). The thermal conductivity is specified in accordance with DIN 52 612. Such a thermal conductivity further improves the insulating properties of the external thermal insulation composite system (ETICS).

[0078] According to a further embodiment, the adhesive foam can exhibit a compressive strength at 10% compression in a range of 3 to 500 kPa. The compressive strength is specified according to ISO 844. This embodiment allows the adhesive foam to be optimally matched to the load-bearing capacity of the external thermal insulation composite system (ETICS).

[0079] The adhesive foam can still have a density in the foamed state ranging from 10 to 300 kg / m³. This density allows the adhesive foam to be further optimized to meet the load-bearing capacity of the external thermal insulation composite system (ETICS).

[0080] Other properties of the adhesive foam that are advantageous for operational use include a tensile strength of 10 to 700 kPa according to DIN 53 455, an elongation at break of 5 to 50% according to DIN 53 455, a shear strength of 15 to 300 kPa according to DIN 53 422, and a temperature resistance of -40°C to +130°C. With regard to the building material class and fire behavior, the values ​​and classifications A1, A2, B1, B2, B3 and A1, A2, B, C, D, E, F according to standard 4102-1 and standard DIN EN 13501-1, respectively, have proven particularly advantageous.

[0081] The adhesive foam can, in principle, be supplied in any suitable container of a size adapted to the intended use.

[0082] According to a particularly practical design, the adhesive foam can be supplied in plastic or metal cans. This makes transport and application especially easy. This is particularly true if the adhesive foam is supplied in compressed form. The metal can be tinplate or aluminum, as is known. Such cans can, for example, have a screw cap that can be screwed onto a standard dispensing gun. However, filling and supplying the foam in cans with dispensing tubes is also conceivable. The dispensing tubes can be designed for single use or for multiple uses. When injecting the adhesive foam after the insulation board has been brought into contact with the substrate, the dispensing gun or the dispensing tube can accordingly have a spray nozzle for injecting the adhesive foam.In principle, all can sizes are conceivable, depending on the intended use.

[0083] The fixing agents are expediently used together with a partially collapsible adhesive foam. This mechanically relieves the fixing agent, which holds the insulation board in position until the adhesive foam has fully cured, as well as the bond between the fixing agent and the substrate, due to the subsequent volume reduction of the partially collapsible adhesive foam.

[0084] A further object of the invention is an insulation system, in particular for the thermal insulation of buildings, comprising at least one insulation board bonded to the substrate by means of an adhesive foam, wherein the at least one insulation board is fixed in the desired position on the substrate by at least one fixing means provided in addition to the adhesive foam, wherein the fixing means has two legs arranged at an angle to each other, in particular at right angles, wherein the legs of the fixing means are pivotable relative to each other, wherein a restoring force is generated when the legs are pivoted relative to each other, wherein, for fixing the insulation board, the first leg is attached to the substrate and the second leg is attached to the insulation board, wherein the legs are pivotable relative to each other in an angular range of +70° to -150°, wherein the sign "+" means that the legs move towards each other and the sign "-" means thatthat the legs move away from each other and the fixing agent contains a flexible material, the flexible material being an elastomer.

[0085] The insulation system can be produced using the method according to the invention. Regarding preferred embodiments of the insulation system, reference is made to the preceding description of the method according to the invention.

[0086] The invention will now be explained in more detail with reference to an embodiment illustrated in a drawing. The drawing shows: Fig. 1 shows a section of a schematic cross-section of two insulation boards to be bonded to a substrate; Fig. 2 shows a section of a schematic cross-section of two insulation boards bonded to a substrate according to a first embodiment according to the invention; Fig. 3 shows a section of a schematic cross-section of two insulation boards bonded to a substrate according to a second embodiment according to the invention; Fig. 4 shows a fixing means for fixing the Fig. 2 in perspective view, Fig. 5a,b the fixing agent of the Fig. 4 in a modified version in two perspective views and Fig. 6 a nail for attaching the fixing device of the Figs. 2 to 4On a lateral edge of an insulation panel, Figs. 7, 8 show fixing devices that illustrate the pivotability of both legs relative to each other. Fig. 9 shows a fixing device that has double-sided adhesive tape on both legs. Fig. 10a shows a fixing device that has double-sided adhesive tape on the first leg and flat-mounted prongs on the underside of the second leg. Fig. 10b shows a fixing device that has double-sided adhesive tape on the first leg and flat-mounted prongs on the top and underside of the second leg.

[0087] In the Figures 1 to 6 and 9, 10a, 10b The swiveling of the two legs of the fixing device is not shown.

[0088] In Figure 1A cross-sectional view of a first insulation panel 1 and a second insulation panel 2 is shown. In this case, the insulation panels 1 and 2 are made of rigid polystyrene foam and are cuboid in shape. In principle, all formats are possible. Examples include width-to-length ratios of 500 x 1000 mm, 625 x 800 mm, 500 x 500 mm, and 1000 or 1200 mm x 200 mm. Typical thicknesses of the insulation panels range from 20 to 400 mm. However, other thicknesses are possible.

[0089] The insulation panels 1, 2 exhibit in Figure 1The insulation panel 1 has lateral edges 1a, 2a (in this case, longitudinal edges 1a, 2a) and shorter transverse edges (not shown). The insulation panel 1 has a tongue 3 on its longitudinal edge 1a, which engages in a corresponding groove 4 on the longitudinal edge 2a of the insulation panel 2 for connection with the insulation panel 2. In this example, no connecting elements are provided at the transverse edges of the insulation panels 1, 2 (not shown), so that these can butt against adjacent insulation panels.

[0090] If square insulation panels 1,2 are used, all edges can have tongue and groove connectors 3, 4. However, it is also conceivable that none of the edges, or only two, especially opposing, edges, have such connectors.

[0091] In this case, the groove 4 and tongue 3 each run centrally along the entire length of edges 1a and 2a. In principle, variable dimensions and positions of the grooves 4 and tongues 3 are possible to suit the intended use. For example, the cross-sectional dimensions of rectangular tongues are 15 mm or 12 mm high and 15 mm wide. The corresponding grooves have corresponding dimensions.

[0092] The insulation boards 1, 2 each have a surface 5, 6 that is to be bonded to a substrate. In the present example, the longitudinal edge 1a of the insulation board 1, which is provided with the tongue 3, has a recess 7 in the area adjoining the tongue 3 and corresponding to the surface 5 to be bonded. This recess can be created, for example, by back-milling the rigid polystyrene foam. In this example, the recess 7 extends completely over the area of ​​the longitudinal edge 1a adjoining the tongue 3 and corresponding to the surface 5 to be bonded. For insulation boards 1, 2 joined together, as in Figure 1 As shown, in the present example, in the area of ​​the longitudinal edges 1a, 2a adjoining the groove 4 and tongue 3, and corresponding to the surfaces 5, 6 to be bonded, there is a gap 8 between the insulation boards 1, 2. In the present example, a recess 7 of 2 mm depth and thus a gap 8 of approximately 2 mm between the insulation boards 1, 2 is provided.

[0093] In Figure 2 are the in Figure 1 The insulation panels 1 and 2 are shown in their bonded state to a substrate 9. In this case, the substrate 9 is a vertical exterior wall of a building. The procedure for bonding the insulation panels 1 and 2 to the substrate 9 is described below.

[0094] For bonding the insulation boards 1, 2 to the substrate 9, a low-expansion, one-component polyurethane foam based on an isocyanato urethane prepolymer, classified as fire-retardant B1 according to DIN 4102, Part 1, is used in this example. The adhesive foam 10 has a density in the foamed state of approximately 20 to 28 kg / m³, a thermal conductivity of 0.040 W / (mK) according to DIN 52 612, and a compressive strength at 10% compression of 25 kPa. Such an adhesive foam 10 is available, for example, under the name Brillux PUR-Füllschaum 3555 and exhibits advantageous properties with regard to workability, curing behavior, and bonding and insulating properties.

[0095] In this example, the polyurethane adhesive foam 10 is first applied manually to the surface 5 of the insulation board 1 to be bonded using a dispensing gun. This can be done partially or over the entire surface. The adhesive foam 10 is supplied in compressed form in metal cans. The cans can have sizes of, for example, 500 ml or 750 ml. However, all other standard or custom sizes are also conceivable. The metal can has a screw connection that is attached to a standard dispensing gun or a dispensing tube for applying the foam 10. As the adhesive foam 10 flows out of the cans, it expands by foaming.

[0096] After applying the adhesive foam 10 to the surface 5 to be bonded, the insulation board 1 is brought into contact with the substrate 9 via its surface 5, so that the adhesive foam 10, which mediates the contact, is located between the substrate 9 and the surface 5. The foam structure of the adhesive foam 10 is not destroyed in the process. After contact, the longitudinal edge 1a of the insulation board 1 runs essentially horizontally, and the tongue 3 provided on the longitudinal edge 1a points towards the upper end of the building wall.

[0097] Immediately afterwards, at least one fixing element, consisting of a first leg 11 and a second leg 12 arranged at right angles to the first leg 11, is attached to the substrate 9. For this purpose, the first leg 11 is provided with a double-sided adhesive tape 13 on its outer surface. Alternatively, the outer surface of the first leg 11 can be provided with a layer of a high-viscosity adhesive, in particular an acrylate-based gel adhesive. One side of the adhesive tape 13 is adhered to the outer surface of the leg 11, while the other side of the adhesive tape 13 is provided with a protective layer.To attach the leg 11 to the substrate 9, the protective layer is removed from the adhesive tape 13 and the fixing agent is glued to the substrate 9 with the first leg 11 above and adjacent to the insulation board 1 in such a way that the second leg 12 forms a substantially horizontal bearing surface running slightly above the recess 7 of the insulation board 1.

[0098] The insulation panel 1 is now aligned for its exact final positioning on the substrate 9 and its recess 7 is brought into contact with the underside of the second leg 12. To fix the insulation panel 1 to the substrate 9, a plastic or metal nail 14 is inserted into the longitudinal edge 1a of the insulation panel 1, which has the recess 7. This prevents the insulation panel 1 from being pushed away from the substrate 9 due to expansion or post-expansion of the adhesive foam 10 and thus from being moved from its intended position. Instead, any post-expansion of the adhesive foam 10 occurs laterally, parallel to the substrate 9.

[0099] In the present example, the legs 11 and 12 of the fixing element each have a length of approximately 40 mm and a width of approximately 20 mm. To fit the recess 7 and the gap 8, respectively, the legs 11 and 12 have a thickness of approximately 2 mm. However, other dimensions are possible. The fixing element can be made of plastic or metal, particularly light metal. The nail 14 can, for example, have a length of 25 mm.

[0100] The second insulation panel 2 is then coated with adhesive foam 10 on its bonding surface 6 and brought into contact with the substrate 9. The adhesive foam 10 located between the substrate 9 and surface 6 again facilitates contact. The tongue 3 on panel 1 engages with the groove 4 on panel 2. In the area of ​​the leg 11 of the fixing agent attached to the substrate 9, the adhesive foam 10 is displaced into the adjacent areas, so that the outer surfaces of panels 1 and 2 are flush. The tongue and groove connection of insulation panel 2 to insulation panel 1 secures the lower section of the panel 2 in place, preventing expansion or post-expansion of the adhesive foam 10 from causing the panel 2 to detach from the substrate 9 in this area.At least one fixing device analogous to the fixing device described with regard to plate 1 is provided on the opposite longitudinal edge of plate 2, which is not shown and is provided with the groove 4.

[0101] The second leg 12 of the fixing agent sits in the gap 8 between the insulation boards 1, 2, so that despite the provided fixing agent, an essentially seamless bonding of the insulation boards 1, 2 to the substrate 9 is possible from the outside of the building.

[0102] After the insulation panels 1, 2 are glued in place, the adhesive foam 10 is cured over a drying period.

[0103] In principle, it is possible to provide several fixing elements along a longitudinal edge 1a, 2a of the insulation boards 1, 2. It is also possible to additionally or alternatively arrange corresponding fixing elements along the transverse edges of the insulation boards 1, 2. Applying fixing elements to the underside of the insulation boards 1, 2 can also be advantageous. In each case, suitable recesses for the fixing elements can be provided, or created, for example, by melting or cutting.

[0104] In external thermal insulation composite systems (ETICS), the insulation boards 1, 2 are bonded to the substrate 9, for example, a building wall, generally from bottom to top. The uncontrolled expansion of the adhesive foam 10 in the lower area of ​​the first, i.e., bottom, row of insulation boards is prevented by the upstand of the base profiles typically installed there. If base profiles are not used, the insulation boards 1, 2 can be fixed with angle brackets, insulation clips, or other fixing devices (nails, staples, dowels, clamps, etc.). This also applies to the last, i.e., top, row of insulation boards, for example, at the roof connection.

[0105] In Figure 3 are the in Figure 1 The insulation panels 1, 2 shown are in the state glued to a substrate 9 according to another embodiment of the invention.

[0106] The first insulation panel 1 is installed according to the design as per Figure 2analogously glued to substrate 9. The design according to Figure 3 differs in terms of the bonding of plates 1, 2 from the one in Figure 2 The depicted embodiment differs only in the design of the fixing agent. The fixing agent according to Figure 3 It in turn has two legs 11, 12 arranged at right angles to each other. According to the in Figure 3 In the example shown, the first leg 11 is designed according to Figure 2 analogously, it is attached to the substrate 9 using double-sided adhesive tape 13. Additionally, the first leg 11 is attached according to... Figure 3 However, it is provided with a bore. At the position of the substrate 9 corresponding to the bore when leg 11 is attached, a dowel 15 is embedded in the substrate 9. In addition to attaching the leg 11 to the substrate 9 using the double-sided adhesive tape 13, the following also occurs during the Figure 3The leg 11 is fastened in the illustrated embodiment by means of a fastening element 16, in particular a nail, which is guided through the bore of the leg 11 and inserted into the dowel 15. In principle, spiral, push-in, screw or hammer-in dowels, for example, can be used as dowels 16.

[0107] This design achieves a particularly high load-bearing capacity for the fastening of the first leg 11. The fastening of the second leg 12 to the insulation board 1 and the subsequent bonding of the insulation board 2 are again carried out in accordance with the design shown. Figure 2 Similarly.

[0108] According to the invention, it is possible both in the embodiment according to Figure 2 as well as in the design according to Figure 3It is also possible that the insulation boards 1, 2 are first applied to the substrate 9 and fastened using the fixing agents. In this case, the adhesive foam 10 is then injected through the insulation boards 1, 2, or through any joints between the insulation boards 1, 2, between the surfaces 5, 6 of the insulation boards 1, 2 and the substrate 9 to be bonded. For this purpose, the adhesive foam 10 can be conveyed, for example, via a spray tube that is inserted through the insulation boards 1, 2 or the joints and attached to the metal cans or their dispensing gun. Preferably, however, a corresponding opening for the spray tube is made in the insulation boards before they are fastened, or holes are drilled into them after they have been fastened.

[0109] In the case of subsequent application of the adhesive foam, spacers can be provided to ensure a gap between the insulation boards 1, 2 and the substrate 9 before the adhesive foam 10 is injected. The adhesive foam 10 can then be injected into the resulting space between the insulation boards 1, 2 and the substrate 9. Alternatively, the first leg 11 of the fixing agent, which is attached to the substrate 9, could itself serve as a spacer.

[0110] According to all the described configurations, a large number of insulation panels 1,2 can be bonded to a substrate 9, so that complete insulation of, for example, a building wall can be achieved.

[0111] In Fig. 4 is a fixing agent for fixing an insulation board to the substrate, similar to what is already used in the Fig. 2 and 3shown in a separate perspective view. It again comprises a first leg 11*, by which it is attached to the substrate, and a second leg 12*, which is connected to a longitudinal edge of the insulation board. The second leg 12* comprises three holes 17 in a row parallel to the outer edge of the leg 12*, through which nails are driven, which, as shown in the Fig. 2 and 3 shown as being inserted into a longitudinal edge of the insulation board.

[0112] The fixative according to Fig. 4 It has a first leg 11* approximately 45 mm long and a second leg 12* approximately 30 mm long. The width of legs 11* and 12* is each approximately 40 mm.

[0113] In Fig. 6A nail is shown which can be inserted through the holes 17 and driven into the insulation board along its longitudinal edge. This nail preferably has a length of approximately 60 mm. The nail has an elliptical head so that it can be easily removed from the insulation board if necessary. Advantageously, the nail and the fixing element are made of the same material, in particular a plastic.

[0114] The in the Figs. 5a and 5bThe depicted fixing element comprises two parallel rows of holes, each formed by three holes, in its second leg 12**. A predetermined breaking edge 18 is formed in the second leg 12** of the fixing element between the rows of holes. With a very thin insulation board that has a tongue and groove in its longitudinal edges, the second leg 12** can thus be shortened very easily by breaking off the outer part of the leg 12** so that, when the insulation board is fixed, it does not completely or partially cover the groove or collide with the tongue. It is understood that several predetermined breaking edges can also be provided on the second leg 12**.

[0115] In the Figures 7 and 8 The fixation device shown illustrates the pivotability of the legs (11***, 12***). The fixation device in Figure 7 The device features double-sided adhesive tapes (13) on both legs as fastening means. Figure 8The fixative shown has a double-sided adhesive tape (13) on the first leg (11***) and a prong (19) on the second leg (12***).

[0116] Figure 9 shows a fixing agent which has double-sided adhesive tapes (13) on both legs (11***,12***). Figure 10a shows a fixing agent which has a double-sided adhesive tape (13) on the first leg (11***) and spikes arranged flat on the underside of the second leg (20). Fig. 10b shows a fixing agent which has a double-sided adhesive tape on the first leg (13) and spikes arranged flat on the top and bottom of the second leg (21).

[0117] Not shown is a further fixing element which has another predetermined breaking edge directly at the contact point of the two legs. With such a fixing element, after sufficient curing of the adhesive and removal of the nail(s), the entire second leg can be broken off, so that, for example, a drip edge profile and / or other types of insulation boards, in particular base and perimeter insulation boards, can be attached below the insulation board.

Claims

1. Method for attaching at least one insulating board (1, 2) to a substrate (9), comprising the following steps: - providing an adhesive foam (10), - applying the adhesive foam to a surface (5, 6) to be bonded of the insulating board (1, 2) and / or to the substrate (9) to be bonded to the insulating board (1, 2), - bringing the surface (5, 6) to be bonded of the insulating board (1, 2) into contact with the substrate (9), - fixing the insulating board (1, 2) to be bonded in each case on the substrate (9) by at least one fixing means, the fixing means having two angled, dimensionally stable legs (11, 12) which can be pivoted in relation to one another, and, for fixing the insulating board (1, 2), the first leg (11) being fastened to the substrate (9), and the second leg (12) being fastened to the insulating board (1, 2), - hardening the adhesive foam located between the insulating board (1, 2) and the substrate (9), wherein the legs (11, 12) of the fixing means can be pivoted with respect to one another and when the legs (11, 12) are pivoted against each other, a restoring force is generated, characterized in that the legs can be pivoted with respect to one another within angles from +70° to -150°, wherein the sign "+" refers to a movement of the legs towards one another and the sign "-" . refers to a movement of the legs away from one another and that the fixing means contains a flexible material, wherein the flexible material is an elastomer.

2. Method according to claim 1, characterized in that the first leg (11) and / or the second leg (12) of the fixing means has at least one fastening means, and / or characterized in that the first leg (11) and / or the second leg (12) of the fixing means is fastened by means of an adhesive, in particular a double-sided adhesive tape, and / or characterized in that the first leg (11) and / or the second leg (12) of the fixing means is fixed by means of a mechanical anchor, and / or characterized in that the second leg (12) has at least one mandrel and / or blade which is pressed into the insulating board (1, 2) in order to fasten the second leg (12) to the insulating board (1, 2), and / or characterized in that both the first leg (11) and the second leg (12) of the fixing means are integrally connected to at least one fastening means.

3. Method according to either claim 1 or claim 2, characterized in that the fastening of the first leg (11) of the fixing means to the substrate (9) and the fastening of the second leg (12) of the fixing means to the insulating board are carried out one after the other.

4. Method according to any of claims 1 to 3, characterized in that the flexible material is provided at least in the connection region of the legs (11, 12), and / or in that a thermoplastic elastomer (TPE), in particular an elastomer containing polyvinyl chloride, thermoplastic polyurethane elastomer (TPU) and / or ethylene propylene diene monomer (EPDM) rubber, is used as the flexible material.

5. Method according to any of claims 1 to 4, characterized in that the insulating board (1, 2) to be bonded is temporarily fixed to the substrate (9) by the at least one fixing means, and / or characterized in that the second leg (12) is fastened to a lateral edge (1a, 2a) of the insulating board (1, 2), wherein optionally a depression (7) for the second leg (12) is provided in the lateral edge (1a, 2a) of the insulating board (1, 2) to be fastened to the second leg (12).

6. Method according to any of claims 1 to 5, characterized in that before the surface (5, 6) to be bonded of the insulating board (1, 2) is brought into contact with the substrate (9), the adhesive foam (10) is applied to a surface (5, 6) to be bonded of the insulating board (1, 2) and / or is applied to the substrate (9) to be bonded to the insulating board (1, 2), and / or characterized in that after the surface (5, 6) to be bonded of the insulating board (1, 2) is brought into contact with the substrate (9), the adhesive foam (10) is applied to a surface (5, 6) to be bonded of the insulating board (1, 2) and / or is applied to the substrate (9) to be bonded to the insulating board (1, 2), wherein optionally the adhesive foam (10) is injected by means of an injection device between the surface (5, 6) to be bonded of the insulating board (1, 2) and the substrate (9).

7. Method according to any of claims 1 to 6, characterized in that the adhesive foam (10) is provided in compressed form, and / or characterized in that as the adhesive foam (10) a low expansion foam with a maximum foam expansion of from 1 to 30%, in particular from 5 to 20%, especially 8 to 15% is used, and / or characterized in that a partially collapsing adhesive foam is used as the adhesive foam (10), wherein optionally the reduction of the volume of the partially collapsing adhesive foam is 1 to 30%, preferably 5 to 20% and especially 7 to 15%, and / or wherein optionally the reduction of the volume of the partially collapsing adhesive foam occurs within from 1 to 30 s, preferably 3 to 20 s, especially 5 to 10 s.

8. Method according to any of claims 1 to 7, characterized in that the adhesive foam (10) is preferably hardened via a drying time and / or UV-radiation, and / or characterized in that the adhesive foam (10) has a raw density of from 10 to 300 kg / m3 after foaming.

9. Method according to any of claims 1 to 8, characterized in that a plurality of insulating boards (1, 2) are bonded to the substrate (9), wherein optionally two insulating boards (1, 2) to be bonded are fixed to the substrate (9) by at least one common fixing means in each case, wherein optionally the common fixing means has at least one fastening means on the top and bottom, wherein optionally the common fixing means has two legs (11, 12), the first leg (11) being fastened to the substrate (9) and the second leg (12) being fastened to both the insulating boards (1, 2) to be bonded in order to fix the insulating boards (1, 2).

10. Method according to claim 9, characterized in that the insulating boards (1, 2) are connected to one another on the substrate (9) by means of connecting means (3, 4) provided at least on the longitudinal edges (1a, 2a) thereof, wherein optionally the insulating boards (1, 2) are connected to one another by means of a toothing.

11. Use of a fixing means having two legs (11, 12), which legs (11, 12) can be pivoted with respect to one another, wherein when the legs (11, 12) are pivoted against each other, a restoring force is generated, wherein the legs can be pivoted with respect to one another within angles from +70° to -150°, wherein the algebraic sign "+" refers to a movement of the legs towards one another and the algebraic sign "-" . refers to a movement of the legs away from one another and that the fixing means contains a flexible material, wherein the flexible material is an elastomer, for attaching insulating boards (1, 2) to a substrate (9), in a method according to any of the claims 1 to 10.

12. Insulating system, in particular for thermal insulation of buildings, having at least one insulating board (1, 2) bonded to the substrate (9) by means of an adhesive foam, the at least one insulating board (1, 2) being fixed in the desired position on the substrate (9) by at least one fixing means (11) provided in addition to the adhesive foam (10), the fixing means having two dimensionally stable legs (11, 12) arranged at an angle, in particular at a right angle, to one another, wherein legs (11, 12) can be pivoted with respect to one another, wherein when the legs (11, 12) are pivoted against each other, a restoring force is generated, the first leg (11) being fastened to the substrate (9) and the second leg (12) being fastened to the insulating board (1, 2) in order to fix the insulating board (1, 2), characterized in that the legs can be pivoted with respect to one another within angles from +70° to -150°, wherein the algebraic sign "+" refers to a movement of the legs towards one another and the algebraic sign "-" . refers to a movement of the legs away from one another and that the fixing means contains a flexible material, wherein the flexible material is an elastomer.

13. Insulation according to claim 12, characterized in that the flexible material is provided at least in the connection region of the legs (11, 12), and / or characterized in that the flexible material is a thermoplastic elastomer (TPE), in particular an elastomer containing polyvinyl chloride, thermoplastic polyurethane elastomer (TPU) and / or ethylene propylene diene monomer (EPDM) rubber, and / or characterized in that the first leg (11) is attached to the substrate (9) by means of an adhesive, in particular an adhesive according to claim 2, and / or characterized in that the adhesive foam is provided according to one of the claims 7 or 8, and / or characterized in that the first leg (11) is fastened to the substrate (9) by means of a fastening means (6), in particular a nail, guided through a hole in the leg (11) and inserted into a dowel (15) embedded in the substrate (9), and / or characterized in that a pin, in particular a nail (14), is pushed through the second leg (12) into the insulating board (1, 2) to fasten the second leg (12) to the insulating board (1, 2) and / or characterized in that the second leg (12) has a mandrel.

14. Insulation system according to one of claims 12 or 13, characterized in that the second leg (12) is attached to a lateral edge (1a, 2a) of the insulating board (1, 2), wherein optionally a depression (7) for the second leg (12) is provided in the lateral edge (1a, 2a) of the insulating board (1, 2) to be fastened to the second leg (12).

15. Insulation system according to any of claims 12 to 14, characterized in that the second leg (12**) has at least one predetermined breaking edge extending substantially parallel to the outer edge of the leg (12**) and / or characterized in that a plurality of insulating boards (1, 2) are bonded to the substrate (9), and / or characterized in that the insulating boards (1, 2) are connected to one another by means of a toothing and / or characterized in that the insulating boards (1, 2) are connected to one another by means of a tongue and groove joint.

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