BE1022011B1 - SET OF BUILDING ELEMENTS AND FILLING MATERIAL FOR SEAM BETWEEN BUILDING ELEMENTS - Google Patents

Abstract

Set of building elements and one or more connecting pieces, whereby the building elements (1, 2) are at least composed of thermal insulation (5) and a base plate (4), whereby the building elements (1,2) are provided on at least one edge (10) of a groove (14) and - wherein the aforementioned one or more connecting pieces (3) are designed as a tongue, each in the aforementioned groove (14) of a first building element (1) and in a groove (15) of a second building element (2) must be arranged to bridge a seam (32) between the first and the second building element (1, 2) when they are abutting in a construction, characterized in that at least the surface material (16) of the connecting piece (3) ) is compressible.

Description

Set of building elements and filling material for the seam between building elements.

This invention relates to a set of building elements and one or more connecting pieces, more specifically for roof, wall or floor constructions and to a filling material for the seam between such building elements.

The building elements or building panels known from the state of the art mainly exist in two types. On the one hand there are the so-called open-scaled building elements, in which a base plate is applied on only one flat side of the building element and in which the other side, namely the open side, is mainly formed by the insulation material itself and, on the other hand, the closed or sandwich building elements, wherein an upper plate is provided on the second flat side of the building element, so that the insulating material is located in the space between the base plate and the upper plate. These types of building elements can be used as a roof element, as a wall element or as a floor element. For examples of open-scaled roof elements and closed or sandwich roof elements, reference is made to EP 0 978 601 and EP 1 162 050 respectively.

The use of building elements as an insulating, possibly self-supporting, roof element is already well known per se. For this purpose, reference is made by way of example to EP 0 450 731 or EP 1 253 257. Such building elements can be mounted with their base plate on a simply constructed roof hood, for example a roof hood with only purlins. After the installation of such building elements, they are usually still fitted with tile battens which in turn support the roof tiles or other roof covering. In such a construction, the building element fulfills the function of a traditional insulated shelter. It is also possible that the aforementioned base plate forms the inner lining of the relevant roof construction or that the base plate is provided with such inner lining. Such custom-made building elements are customarily prefabricated for a home. Similar building elements can also be used to form a wall construction and / or a floor construction.

A current challenge in the construction sector is the ever higher demands placed on buildings in terms of airtightness, thermal and / or acoustic insulation. When using the above-mentioned building elements, the seams between two adjacent building elements can form a weak link, in particular in the area of airtightness, thermal and / or acoustic insulation.

According to the current state of the art, the above-mentioned seams are often finished or sealed by applying a tape or a foaming filler, such as with a PU foam, for example by means of a spray can. Some existing building elements provide a recess at the top edge of the building element, whereby the use of a foaming filler is simplified and / or improved. However, finishing the seams with the aid of, for example, an insulating foam is cumbersome and labor-intensive. In addition, non-elastic insulating foams can tear over time and due to movement of the roof, making the air seal not durable.

A common problem with the use of the above-mentioned types of building elements is the correct joining and mutual alignment of adjacent building elements. This is partly due to variations and tolerances of the underlying structure and / or of the building element itself, as well as to the differential deflection of adjacent building elements.

A further problem with the use of the above-mentioned types of building elements is the formation of a continuous water-retaining layer. In particular at the seams between adjacent building elements, there is often a problem of an interruption in the water-retaining layer. According to the state of the art, a water-retaining layer is realized on the flat side of the building element which is directed outwards when mounted.

Furthermore, the problem of condensation in the seams can be mentioned. Because, in the case of no or poor finishing of the seams, hot air can penetrate into the seam between two adjacent building elements and condensation starts against the cold top of the building elements, condensation problems can arise. Namely, the seams can form an interruption in the vapor-repellent layer formed by the two or more building elements. According to the state of the art, a vapor-repellent layer is realized at the level of the flat side of the building element which is directed inwards when mounted.

It is known from US 4,443,988 to provide grooves in the edge of an insulation panel with cladding and to use a tooth in the form of a wooden slat for joining and aligning adjacent insulation panels with cladding. A chamfer is hereby provided on an edge of the tooth, so that it can be fitted more easily in the groove. As a result, a solution is offered in a relatively inexpensive manner for interconnecting such insulation panels with a limited risk of damage to the panels. The use of wooden slats further limits the differential deflection of adjacent insulation panels. The seams between the adjacent building elements of US 4,443,988 are not airtight and there is a risk of condensation forming in these seams.

US 5,950,389 shows other teeth for connecting two adjacent building elements. The teeth in question are glued into a groove in the insulation material. The use of an adhesive or glue during the assembly of such panels is on the one hand labor-intensive and on the other hand it makes installation of the panels more difficult.

With a view to achieving an improvement in the field of airtightness, thermal and / or acoustic insulation of buildings, in particular at the level of the seam between two adjacent building elements, according to a first independent aspect, the present invention relates to a set of building elements and one or more connecting pieces, wherein the building elements are built up at least from thermal insulation and a base plate, wherein the building elements are provided with a groove on at least one edge and wherein said one or more connecting pieces contain at least one surface material and wherein said one or more connecting pieces are designed as a tooth, each of which must be provided in both the aforementioned groove of a first and a second building element in order to bridge a seam between the first and the second building element, when they are adjacent in a construction, characterized in that at least the surface material of the connecting piece, at least locally, compressible. The aforementioned building elements preferably relate to the opaque building elements or closed building elements, also referred to as sandwich building elements, as described above.

Because, according to the invention, at least the surface material of the connecting piece is designed to be compressible at least locally, a smooth assembly of the building elements and the connecting pieces can be achieved and / or improved properties of the construction at the location of the seam between two adjacent building elements. For example, an improved airtightness can be achieved. With a smooth assembly it is meant, among other things, that the connecting piece can be arranged more easily in the groove of the aforementioned building elements.

According to a preferred embodiment of the present invention, the aforementioned connector is compressed, at least locally, when it is mounted in the aforementioned grooves. This ensures a certain clamping of the tooth in the groove.

According to a preferred embodiment, the aforementioned one or more connecting pieces consist of at least two materials, more particularly a core material and a separate surface material, wherein the separate surface material is more compressible than the core material. By using a less compressible core material, the differential deflection between adjacent building elements can be limited, while the advantages of the compressible surface material are retained. The core material preferably comprises wood-based material, such as plywood.

In a further preferred embodiment, at least one of the aforementioned connecting pieces has a bending stiffness that is greater than that of the aforementioned base plate of the building elements. As a result, differential bending of adjacent building elements can be reduced by using such connecting pieces. The bending stiffness of the connecting piece can be influenced here by the choice of a material with a high elastic modulus and / or by the choice of a cross-sectional geometry that produces a high moment of inertia. Furthermore, the differential deflection can be limited by a good location of the connecting piece relative to the neutral line of the building element. For example, a connecting piece with a core material of hard PVC in the form of a hollow profile can be chosen. By positioning the connecting piece close to the bottom or close to the top of the building element, the resistance to differential bending can be favorably influenced.

According to a possible embodiment, the core material of the connecting piece is extruded from a hard PVC material. Preferably, the individual surface material is extruded from a soft PVC material. Still according to a preferred embodiment, core material and the separate surface material are formed by co-extrusion

According to a possible embodiment of the first aspect of the present invention, the aforementioned individual surface material is located at least on a portion of the core material that is provided in the aforementioned grooves, more particularly at an angle of the core material which is to be in one of the aforementioned grooves be provided, and better still at least at two angles to be provided in respective grooves of the first and second building elements. This can contribute to the smooth assembly of the connecting piece in the respective grooves.

According to another possible embodiment of the first aspect, the aforementioned individual surface material is located at least on one side of the core material which is provided in the aforementioned grooves, more particularly on the underside or top of the core material which is to be placed in one of the aforementioned grooves applied. This can contribute to good air tightness between adjacent building elements. Preferably, the aforementioned separate surface material is also applied to the end faces of the core material of the connecting piece, in order to also promote the air tightness between two components at the end connection of two connecting pieces.

According to the most preferred embodiment, the aforementioned surface material comprises a foamed material, such as PVC, PU, PET or vinyl. Preferably the foamed material is a PVC foam, for example an open-cell PVC foam.

The aforementioned surface material preferably has a smooth outer surface, for example formed by a foil or a sliding foil. Such a smooth outer surface contributes to an even smoother assembly, whereby, in particular, positioning and adjusting of adjacent building elements becomes less cumbersome. In addition, a vapor inhibition extending over the seam can be achieved. The aforementioned foil can contribute to the prevention of vapor diffusion and convection in the seam. Preferably, the aforementioned film is a polyester film. It is clear that according to such an embodiment, the aforementioned surface material consists of several layers, namely a first layer of a compressible material, for instance foamed material, and on the outer surface a second layer which forms a smooth surface, for example a foil.

According to a practical example, the connecting piece may consist of a separate surface material, optionally including the optional foil, and a core material, the separate surface material consisting of a tape which is arranged at least locally around the core material. Such an embodiment provides a particularly simple production of the aforementioned connecting pieces, while an adequate air seal can nevertheless be achieved. It may, for example, be a single-sided adhesive open-cell PVC foam which is provided with a polyester foil at the top. Such tape is commercially available as single-sided adhesive tape. An example of such a tape is "Celband ® PVC" from the "Celdex" brand.

According to the present invention, the bridging by means of the special connecting piece, in the assembled state, preferably creates an airtight seam between two adjacent building elements. Moreover, by means of embodiments which use a film on the outer surface of the surface material, a vapor-tight seam can be achieved. The latter is especially interesting when the building elements of the set also comprise a vapor-barrier layer and the vapor-tight barrier of the seam connects with the vapor-barrier layer of the adjacent building elements.

In general, the invention of the first aspect can be practically implemented in various ways. A distinction can be made here between, on the one hand, designs for building elements consisting of insulating material on the edge, more specifically thermal insulation, and, on the other hand, designs for building elements that consist of a rib on the edge, more particularly a structural rib of the building element.

According to a first practical possibility that can be applied in the case of a building element consisting of insulating material at the edge, the aforementioned groove is embodied in the aforementioned thermal insulation of the building elements. Such a groove is preferably located just above the aforementioned base plate, or at a small distance above it. It is not excluded that the groove would be at least partially submerged in the inner surface of the aforementioned base plate.

According to a second practical possibility, in the case that the aforementioned building elements further comprise one or more ribs, at least one of the aforementioned grooves is made in at least one of the aforementioned ribs.

As mentioned, the aforementioned connecting piece, or at least the surface material, is preferably in an at least locally compressed state in the aforementioned groove. This can be achieved, for example, by means of adapted dimensions of the groove and the connecting piece to be fitted therein. Preferably an at least local compression of 30% or more, for example 50% or more, is achieved. This means that the thickness of the compressible surface material is locally reduced by at least 30% or at least 50%.

According to a first possible embodiment, the dimensions of the groove can be chosen such that the height of the groove is smaller than the thickness of the part of the connecting piece arranged therein, such that the proposed reduction of the thickness of the surface material is achieved.

Instead of or in combination with the aforementioned adapted dimensions, use can also be made of a pressure system for the connecting piece and / or of a possible bending of the building elements. Use can for instance be made of a pressing system with a screw system with which the connecting piece, more particularly its surface material, is pressed against the building element, for example against the base plate and / or the insulating material.

According to a possible embodiment of the first aspect of the invention, in the assembled state, the aforementioned connecting piece is completely between the building elements. In other words, the connecting piece is preferably, in the assembled state, not above or below the component. In this case, the connecting piece is not only partially above or below the building elements.

Preferably, at least one of the aforementioned connecting pieces, in assembled condition, is located close to the base plate of the building element, namely against the base plate, on its inside, sunk in the base plate, on its inside, or internally in the building element at a maximum distance from this inside that is equal to the thickness of the base plate, or at a maximum distance of 15 millimeters from this inside. This makes it easier to achieve a sufficient air-tightness of the seam, since no or fewer air leaks can occur over the insulation material.

According to a special embodiment, the connecting piece can be combined with a finishing profile, whether or not in one piece with the aforementioned connecting piece, whereby the seam between the base plates, which are normally directed towards the inside of the construction, can be finished.

For the same purpose as in the first aspect, according to a second independent aspect, the present invention relates to a set of building elements, wherein the building elements are at least composed of thermal insulation and a base plate, wherein at least one first building element is provided with a tooth on at least one edge , characterized in that at least one second building element is provided on at least one edge with a compressible material part which, in the assembled condition of the first and the second building element, cooperates with the aforementioned tooth of the first adjacent building element. A smooth assembly of the building elements can hereby be obtained and / or an improved airtightness, thermal and / or acoustic insulation can be achieved. An additional advantage is that, as a result, subsequent spraying of the seams with an insulating foam can be reduced or even avoided.

In the context of the second aspect, a tooth is seen as a local protrusion on the edge of the building element. Said local projection on the edge may or may not be permanently connected to the building element. Such a tooth can for instance be formed by a slat which is connected to the edge of the first building element, preferably by a slat which is glued in this edge or is connected in another way to this edge, for instance by means of a mechanical locking, more particularly a mechanical lock with a locking tongue and groove.

Here are some examples of ways in which the aforementioned tooth can be performed in case it is formed on a slat. According to a first example, the tooth can be formed by the full edge of the aforementioned slat.

According to a second example, the tooth can be formed by a local protrusion on the slat. The aforementioned local protrusion is also referred to as a cam. In the latter case the local projection of the building elements in the assembled state cooperates with the aforementioned compressible material part of a second building element. The dimensions of the tooth can hereby be limited, which can result in an improved cooperation with the compressible material part. The tooth is in particular pressed into the compressible material at a higher pressure, which is advantageous for the properties of the obtained seam.

According to another example, the first building element comprises a rib on the aforementioned edge and the aforementioned tooth is embodied in one piece with this rib, for example by machining, more particularly by milling the aforementioned rib.

Preferably, the height of said tooth, viewed in cross-section, is between 4 and 8 millimeters, with 5 millimeters being a good value.

The aforementioned compressible material part is preferably incorporated in the edge of the aforementioned second building element. It can hereby be achieved that the dimensions of the seam between two adjacent building elements can be limited.

Preferably, the aforementioned compressible material part, viewed in cross-section, protrudes from the edge of the second building element. Preferably, the aforementioned compressible material part projects only partially with respect to the edge. In other words, the aforementioned compressible material part is partially worked into the edge of the aforementioned second building element.

The aforementioned compressible material part is preferably formed by a foamed material, such as, for example, a closed-cell PVC foam. It may, for example, be formed by the compressible materials, films and tapes mentioned in connection with the first aspect, for example by a single-sided adhesive tape. The use of a closed-cell PVC foam has the advantage that vertical transport of moisture in the seam can be reduced or avoided and thus contribute to vapor-tight sealing of the seam.

For the same purpose as in the first and second aspect, according to a third independent aspect, the present invention relates to a filling material for the seam between adjacent building elements, wherein this filling material mainly consists of a core material and a surface material, the aforementioned core material preferably being an insulating material , characterized in that the surface material is more compressible than the aforementioned core material. Because the aforementioned surface material is more compressible than the aforementioned core material, the filling material can be applied in a smooth manner in the seam between adjacent building elements and an improved airtightness, thermal and / or acoustic insulation can be achieved. An additional advantage is that the use of an insulating foam for the subsequent spraying of the seams can be reduced or even avoided.

According to a variant, the aforementioned core material may consist of a material other than an insulating material. For example, the core material may consist of a wood-based material or a plastic material.

The filling material is preferably elongated and preferably has a substantially rectangular cross-section, wherein the width direction and the length direction of the filling material coincide respectively with the width and length direction of the seam to be filled. The surface material is preferably arranged over at least two sides of the filling material. The aforementioned surface material is preferably arranged over at least one of the corners of the filling material. According to a more preferred embodiment, the surface material is arranged in one piece around three sides of the core material. According to a possible embodiment, the aforementioned surface material is arranged completely around the core material. This has the advantage that the filling material thus formed is completely symmetrical, which can avoid errors during filling.

The aforementioned core material is preferably provided with one or more recesses that extend mainly in the height direction of the filling material. On the basis of such a recess, a deformability of the core material, more particularly a variable width, is obtained. This is advantageous for filling in seams with a widely varying width, wherein the compressibility of the surface material alone would not be sufficient to obviate this and to obtain good properties at the location of the seam.

According to a preferred embodiment, the filling material of the third aspect further has the feature that the filling material is compressed during the application of the filling material in the seam between adjacent building elements and wherein the compression is the result of an adapted dimensioning of the filling material relative to the filling material. dimensions of the seam.

By adapted dimensions of the filling material is meant a dimension which is adapted to the dimensions of the seam between two adjacent building elements. The dimensions, more particularly the width or thickness of the filler material can be chosen, for example, larger than the width of the seam, so that a compression of the filler material is obtained when it is applied in the seam.

For the compression of the surface material, preferably the same local compression is chosen as is the case in the first aspect, namely at least 30% or at least 50% thickness reduction.

The compressible surface material of the third aspect is preferably formed by a foamed material, such as, for example, a PVC foam. It may, for example, be formed by the compressible materials, films and tapes mentioned in connection with the first aspect, for example by a single-sided adhesive tape.

Furthermore, the filling material of the third aspect preferably comprises a water-repellent element at the top, so that any precipitate seeping under the roof covering cannot penetrate the seams between the building elements.

For the same purpose as in the first three aspects, according to a fourth independent aspect, the present invention relates to a set of building elements, wherein the building elements are built up at least from thermal insulation, a base plate and a compressible material part along at least one edge of the building element, the said compressible material part, seen in cross-section, extends further than the base plate, characterized in that in the assembled state of two building elements an airtight seam can be created by compressing the said compressible material part. Creating an airtight seam by using a compressible material part provides a simple construction of such building elements. An additional advantage is that the use of an insulating foam for the subsequent spraying of the seams can be reduced or even avoided.

Hereby some examples are given of ways in which the compressible material part of the fourth aspect can be designed.

According to a first example, the compressible material part can mainly consist of a soft insulation material. By a soft insulation material is meant insulation material which can be compressed very easily, such as for example rock wool or glass wool. The aforementioned soft insulating material can relate to the same insulating material as the aforementioned thermal insulation of the building element and may or may not be designed in one piece.

According to a second example, the aforementioned compressible material part may comprise a foamed material, for example the compressible materials of the first aspect.

According to a third example, the aforementioned compressible material part can be formed by protrusions in the edge of the building element. For example, notches can be formed in the thermal insulation of the building element, as a result of which a compressible material part is formed at the edge of the building element in the form of one or more protrusions which are situated between said notches.

A building element with such protrusions or notches provides an improvement per se with regard to the properties of the seam, whether or not it is airtight. Therefore, according to a fifth aspect, the invention also relates to a set of building elements, wherein the building elements are built up at least from thermal insulation, a base plate and a compressible material part along at least one edge of the building element, the aforementioned compressible material part, seen in cross-section, extending beyond the base plate, characterized in that said at least one edge of the building element is mainly formed by a solid insulating material and wherein the compressible material part is formed by notches in the edge of the building element. By a solid insulating material is meant a rigid foam insulating material such as for example expanded polystyrene foam, extruded polystyrene foam, polyurethane foam, polyisocyanurate foam, phenol formaldehyde foam or resole foam. The set of building elements of the fifth aspect allows a simple production, possibly also an improved airtightness, thermal and / or acoustic insulation can be achieved. An additional advantage is that the use of an insulating foam for the subsequent spraying of the seams can be reduced or even avoided.

According to a preferred embodiment, the set of building elements of the fifth aspect is further characterized in that the aforementioned notches in the edge of the building element consist of a repetitive pattern of notches over substantially the full height of the edge of the building element. A simple production of the building elements can hereby be achieved.

With the insight to better demonstrate the features of the invention, a few preferred embodiments are described below as an example without any limiting character, with reference to the accompanying drawings, in which: figure 1 shows in perspective a set of building elements and a connecting piece with the features of the first aspect of the invention; figure 2 shows on a larger scale a cross-section of a connecting piece, according to the line II-II indicated in figure 1; figures 3 and 4 represent a cross-section of variants of a set of building elements according to the line III-III indicated in figure 1, but in assembled condition; figure 5 represents a set of building elements, in a view as indicated in figure 3 with F5, with the features of the second aspect of the invention; figures 6 and 7 represent a set of building elements, in a view similar to that of figure 5, in which filling materials are used with the features of the third aspect of the invention; figure 8 represents a set of building elements according to a section similar to that of figure 3, in non-assembled state, with the features of the fourth aspect of the invention; figure 9 represents a possible variant of the set of building elements according to a section similar to that of figure 3, in the non-assembled state, with the features of the fourth aspect;

Figure 10 shows a set of building elements according to a cross-section similar to that of Figure 3, in non-assembled state, with the features of the fifth aspect of the invention;

Figure 1 shows a set of building elements 1,2 and a connecting piece 3, in the non-assembled state, including the features of the first aspect of the invention. In the example of Figure 1, the building elements 1 and 2 relate to two open-type elements, more particularly a first building element 1 and a second building element 2. These two building elements 1,2 each comprise a base plate 4 and thermal insulation 5, as well as in this example two ribs 6.7 each. For the sake of simplicity of the figure, one half of the second building element 2 was omitted by means of a longitudinal cut of the building element. The thermal insulation 5 in this example relates to a solid insulation material, in particular a hard foam insulation material of the polyisocyanurate PIR type.

The building elements 1, 2 have a rectangular shape and are characterized by a width B, length L and a thickness D, wherein the building elements have a length L that is greater than the width B and greater than the thickness D. The aforementioned connecting pieces 3 are designed as elongated parts. The connecting pieces 3 preferably have a length corresponding to the length L of the components 1,2.

Each building element is further characterized by an upper side 8 and a lower side 9 with four edges 10-13 between them. In the example of Figure 1, according to the first aspect of the present invention, each building element 1 and 2 is provided on two edges 10 and 12, more particularly on two opposite edges 10 and 12, with a groove 14 and 15. These grooves 14, 15 have a constant cross-section according to this example and extend over the full length L of the components 1,2.

In the shown example of figure 1, the aforementioned connecting piece 3 comprises a separate surface material 16 and a core material 17. In this example, the core material 17 is a wood-based material, more particularly plywood.

The special feature of the set of building elements 1, 2 and connecting piece 3 is that the aforementioned separate surface material 16 of the connecting piece 3 is compressible.

Figure 2 shows a cross-section of the connecting piece 3 along the line II-II indicated in Figure 1. In the example as shown in Figs. 1 and 2, the separate surface material 16 is located on a part of the core material 17, more particularly at two corners of the connecting piece 3 which are in the respective grooves 14 and 15 of the first and the second building element 1, 2 must be applied.

The aforementioned separate surface material 16 consists of two layers 18 and 19. More specifically in this example, the separate surface material 16 comprises a first layer of a foamed material 18, namely an open-cell PYC foam 18. In addition, the separate surface material 16 has a second layer of existing from a sliding foil 19, more particularly a polyester foil 19. Still according to the example shown, the separate surface material 16 is a tape which is arranged around the core material 17. The height of the connecting piece 3 in the non-compressed state is shown here by H1.

Figure 3 shows a variant with two identical connecting pieces 3 which form a bridge between two adjacent building elements 1 and 2. In this example, the building elements 1 and 2 relate to building elements of the closed type. In this example, the building elements 1 and 2 contain, in addition to a base plate 4 and a thermal insulation 5, also a top plate 20 as well as counter slats 21 which are connected to the top side of the top plate 20.

Furthermore, on figure 3 the non-compressed state of the individual surface material 16 is schematically represented with the aid of the contour 31 shown in dotted line.

In the example of Figure 3, the compression of the separate surface material 16 of both connecting pieces 3 has been obtained in each case by an adapted dimensioning of the grooves 14,15 with respect to the connecting piece 3.

The aforementioned adjusted dimensions of the grooves 14 and 15 in this example consist in that the height H2 of the grooves is smaller than the height H1 of the connecting piece 3 in the non-compressed state.

According to the embodiment shown, the compression of the surface material 16 against the wall of the grooves 14 and 15 reduces or prevents air circulation through the seam 32. In other words, a certain airtightness is obtained from the seam 32 between the two adjacent building elements 1 and 2.

The building elements 1 and 2 of figure 3 furthermore have the preferred feature that they are provided with a vapor-inhibiting layer 33 located between the base plate 4 and the thermal insulation 5. Hereby the grooves 14 and 15 on the underside 9 of the building elements 1 and 2 in each case formed on one wall by the aforementioned vapor barrier layer 33.

Furthermore, the lower connecting piece 3 from the example of Figure 3 also makes it possible to form a continuous vapor-inhibiting layer 33. At the level of the seam 32, the surface material 16, more particularly the polyester foil 19, forms a bridging of the vapor-inhibiting layers 33 of the adjacent building elements 1 and 2. Because of the compression of the surface material 16 against the aforementioned wall of the grooves 14 and 15 it is obtained that vapor present in the air on the underside 9 cannot migrate through the seam 32 between two adjacent building elements 1, 2.

Figure 4 shows yet another possible embodiment of the first aspect, in which the separate surface material 16 is arranged as two separate strips on one side of the connecting piece 3, more particularly on the side directed downwards.

Furthermore, in this embodiment, the compression of the individual surface material 16 is not achieved by an adapted dimensioning of the grooves but by a pressure system 22, more particularly a pressure system 22 with a screw system.

Figure 5 shows in a view similar to that of Figure 3 a set of building elements 1, 2 in assembled condition with the features of the second aspect of the invention. This figure shows a set of building elements 1, 2, wherein the building elements 1, 2 are each constructed from a base plate 4 and a thermal insulation 5 and wherein a first building element 1 is provided with a tooth 23 on one edge 10. The special feature of the set of building elements 1, 2 from figure 5 consists in that a second building element 2 is provided on one edge 12 with a compressible material part 24 which, in the assembled state of the building elements 1 and 2, cooperates with the aforementioned tooth 23 of the first building element 1 .

In the shown example of figure 5 the tooth 23 is formed by a local protrusion 23 on a slat 25 which in turn is glued in the edge 10 of the first building element 1. This glue connection 34 is schematically represented in the figure by a thick line . The edge 12 of the second building element 2 furthermore has a recess in which the compressible material part 24 is incorporated, more particularly partially worked in and the compressible material 24 here partially protrudes relative to the edge 12. In the example the compressible material part 24 relates to a closed cell PVC foam.

Figure 6 shows a filler material 26 according to the third aspect of the present invention, wherein this filler material mainly consists of a core material 17 and a surface material 16. The special feature of the filler material 26 of Figure 6 is that the surface material 16 is more compressible than the aforementioned core material 17. Furthermore, the filling material 26 from the example of Fig. 6 is further characterized in that the filling material 26 has a substantially rectangular cross section. According to this possible embodiment, the aforementioned surface material 16, more particularly the open-cell PVC foam 16, is arranged completely around the core material 17. Furthermore, the example shown has two recesses 27, which extend in the direction of the height H3 of filling material. One of these recesses is at the top and another is at the bottom of the stuffing material 26, while both recesses 27, viewed in the width direction, are in the center of the core material 17. According to this possibility, the filling material 26 has the feature that the core material 17 in the direction of the height H3 of the filling material 26 comprises at least one zone that is free of recesses 27. This results in a filling material 26 in which the core material 17 has an H-shaped cross-section possession.

Figure 6 also shows that the padding material 26, more particularly the surface material 16, is compressed when it is used in the seam 32 of two adjacent building elements 1 and 2. The non-compressed state is shown schematically in Figure 6 by the contour 31 of the padding material 26 when it is not compressed.

Figure 7 shows, still according to the invention, a possible variant of the filling material 26, in which there are two recesses 27, more particularly one on the top side and one on the bottom side of the filling material 26, while both recesses 27, viewed in the width direction, each on one side of the centerline M of the core material. According to this possibility, the filling material 26 further has the feature that the core material 17 in the direction of the height H3 of the filling material 26 comprises at least one zone where both the aforementioned recesses 27 are present. A filling material 26 is hereby created, wherein the core material 17 has an S-shaped cross-section. The example of figure 7 further has the feature that the filling material 26 contains a water-repellent element 28. According to the possible embodiment shown in Fig. 7, the water-repellent element 28 is embodied as a roofing film 28. According to this example, this is partially connected by means of an adhesive connection 34 to the top side of the filling material 26 and further comprises a portion on either side of the filling material. extends over the water-retaining layer 29 of the adjacent building elements 1 and 2. In the example of Figure 10, the water-repellent element 28 can be placed over the ribs 6 and 7 of the building elements.

Figure 8 shows a set of building elements according to the fourth aspect of the invention, wherein the building elements 1 and 2 are built up from a base plate 4 and thermal insulation 5 and wherein the building element 1 comprises a compressible material part 24 on one edge 10. Seen in cross-section, this compressible material 24 extends further than the base plate 4 of the building element 1. The special feature of the set of building elements 1, 2 from figure 8 is that an airtight seam can be formed in that the compressible material part 24, in the assembled state of the components 1 and 2, is compressed. As in the example of Figure 8, the aforementioned compressible material part 24 can be formed by a foamed material, more in particular by a closed-cell PVC foam 24 which is applied over substantially the full height of the edge 10.

Figure 9 shows another possible embodiment of the fourth aspect. The thermal insulation 5 of the building elements in this example consists of a soft insulation material, more particularly of glass wool insulation material 5. In this example, the compressible material part 24 is also formed by a soft insulation material, more in particular by the same insulation material of the thermal insulation 5 of the building element. In this example, the compressible material part 24 is made in one piece with the thermal insulation 5 of the building element. When assembling two or more of such building elements 1, 2 an airtight seam can be formed because the compressible material part 24, in this case formed by a protruding part of the thermal insulation 5 of the building element, is compressed.

Figure 10 shows a set of building elements 1 according to the fifth and last aspect of the present invention, wherein the building elements 1 and 2 are each constructed from thermal insulation 5, a base plate 4 and in this example on two edges 10 and 12 a compressible material part 24 contain. In this example, the compressible material part 24 also extends, seen in cross-section, further than the base plate 4 of the component 1.2. The special feature of the set of building elements 1, 2 from Figure 10 is that the edges 10 and 12 are each formed by a solid insulating material 5, in this example by PUR insulating material 5 and wherein the aforementioned compressible material part 24 is each time formed by notches 30 For the sake of clarity of the drawing, three of the many notches 30 are indicated in Figure 10. The notches 30 as used in the example of Figure 10 in each case form a repetitive pattern of notches 30 over the entire height of the edge 10, 12 of each building element 1 and 2.

The present invention is by no means limited to the embodiments described above, but such building elements and roof constructions can be realized according to different variants without departing from the scope of the present invention.

Claims (17)

Conclusions. 1. - Set of building elements and one or more connecting pieces, wherein the building elements (1, 2) are constructed at least from thermal insulation (5) and a base plate (4), wherein the building elements (1,2) on at least one edge (10) ) are provided with a groove (14) and wherein the aforementioned one or more connecting pieces (3) are designed as a tooth, each of which in both the aforementioned groove (14) of a first building element (1) and in a groove (15) of a second building element (2) must be provided to bridge a seam (32) between the first and the second building element (1, 2) when they are adjacent in a construction, characterized in that at least the surface material (16) of the connecting piece (3) is compressible. Set of building elements and one or more connecting pieces according to claim 1, characterized in that said one or more connecting pieces (3) consist of at least two materials, more particularly a core material (17) and a separate surface material (16) and wherein the individual surface material (16) is more compressible than the core material (17). Set of building elements and one or more connecting pieces (3) according to claim 2, characterized in that said one or more connecting pieces (3) have a bending stiffness that is greater than that of the aforementioned base plate (4) of the building elements (1) , 2). Set of building elements and one or more connecting pieces according to one of the preceding claims, characterized in that said one or more connecting pieces (3) are formed by extruded hard PVC, preferably with a separate surface material (16) formed by extruded soft PVC. Set of building elements and one or more connecting pieces according to one of the preceding claims, characterized in that the aforementioned one or more connecting pieces (3) contain a so-called sliding foil (19). Set of building elements and one or more connecting pieces according to one of the preceding claims, characterized in that the aforementioned groove (14, 15) is made in the aforementioned thermal insulation (5) of the building elements (1, 2). Set of building elements and one or more connecting parts according to one of the preceding claims, characterized in that one or more of the aforementioned building elements (1, 2) further comprise one or more ribs (6, 7) and wherein at least one of the the aforementioned grooves (14, 15) are made in at least one of the aforementioned ribs (6, 7). Set of building elements and one or more connecting parts according to one of the preceding claims, characterized in that, in the assembled state, the transfer between two adjacent building elements (1, 2) which, as aforementioned, are formed by at least one of the aforementioned connecting pieces (3 ), creates an airtight seam (32). Set of building elements and one or more connecting pieces according to one of the preceding claims, characterized in that the aforementioned surface material (16) is a foamed material. Set of building elements and one or more connecting pieces according to one of the preceding claims, characterized in that the aforementioned surface material (16) is arranged at least around one of the corners of the connecting piece (3). 11. - Set of building elements, wherein the building elements (1, 2) are at least composed of thermal insulation (5) and a base plate (4), wherein at least a first building element (1) is provided with at least one edge (10) with a tooth (23), characterized in that at least one second building element (2) is provided on at least one edge (12) with a compressible material part (24) which, in the assembled state of the first and the second building element (1,2), cooperates with the said tooth (23) of the first adjacent building element (2). Set of building elements according to claim 11, characterized in that said tooth (23) is formed by a slat (25) which is connected to the edge (10) of the first building element (1), preferably by a slat ( 25) which was glued into the edge (10). Set of building elements according to claims 11 or 12, characterized in that the aforementioned compressible material part (24) is formed by a foamed material. Set of building elements according to one of claims 11 to 13, characterized in that the aforementioned compressible material part (24) is incorporated in the edge (12) of the said second building element (2). 15. - Filling material for the seam (32) between adjacent building elements (1, 2), said filling material (26) consisting essentially of a core material (17) and a surface material (16), the aforementioned core material (17) being an insulating material characterized in that the surface material (16) is more compressible than the aforementioned core material (17). 16. - Set of building elements, wherein the building elements (1, 2) are at least composed of thermal insulation (5), a base plate (4) and a compressible material part (24) along at least one edge (10) of the building element (1) , wherein said compressible material part (24), seen in cross-section, extends beyond the base plate (4), characterized in that in the assembled state of two building elements (1, 2) an airtight seam (32) can be created by the compressing the aforementioned compressible material portion (24). 17.- Set of building elements, wherein the building elements (1, 2) are at least composed of thermal insulation (5), a base plate (4) and a compressible material part (24) along at least one edge (10) of the building element (1) wherein said compressible material part (24), seen in cross section, extends beyond the base plate (4), characterized in that said at least one edge (10) of the building element (1) is mainly formed by a solid insulating material and wherein the compressible material part (24) is formed by notches (30) in the edge (10) of the building element.