DE8904488U1 - Construction element, in particular thermal insulation board for ventilated roof constructions - Google Patents

Description

Haäcke -THaacke GmbH + Co
Am Ohlhofsberge 3

3100 Celle

Construction element, in particular thermal insulation board
for ventilated roof constructions.

The invention relates to a plate-shaped building element with tongue and groove on the opposite long sides and with tongue and groove on the opposite transverse sides, for connecting adjacent similar plate-shaped building elements to form an inclined surface, in particular a thermal insulation panel for ventilated roof constructions.

Roofs are often assembled from individual, weatherproof components to form larger roof surfaces in such a way that no moisture can penetrate through the joints between the elements. This is achieved, for example, by overlapping the elements. In addition, any remaining openings between the elements are sealed from the inside of the roof. It is also known to provide components made of a foamed material with a tongue and groove and to put these elements together to form a larger surface. Such surfaces serve as thermal insulation in ventilated roof structures, so that rain is caught and drained away by the weatherproof roof covering lying above such surfaces. Such thermal insulation layers can therefore also be designed as visible surfaces on their inside; however, it has been shown that such thermal insulation layers must also be designed to be as watertight as possible. For example, in very cold weather, frost forms on the underside of the roof covering, which melts again when exposed to sunlight. The resulting liquid gets onto the top of the thermal insulation layer and, if the thermal insulation layer is leaky, penetrates through the joints and forms unsightly discolorations on the underside. Even with thermal insulation layers with tongue and groove joints, water occasionally seeps through the joints.

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•The invention is based on the object of creating a construction element, the use of which achieves largely waterproof surfaces, in particular for ventilated roof structures. This object is achieved by the invention characterized in claim 1. Further developments of the invention are described in the subclaims.

In principle, the problem is solved by, on the one hand, making the panel joints largely airtight in order to keep the influx of air humidity into the space above the thermal insulation panels to a minimum, and, on the other hand, by draining the dripping water that reaches the top of the building element largely through drainage channels and, if it does penetrate into the joints, draining it out of these joints again.

To explain the invention in more detail, an embodiment is described below with reference to the drawings. These show in

Fig. 1 a section through a roof construction element according to the invention

Fig. 2 a top view of the roof element shown in Fig. 1

Fig. 3 is a plan view of another embodiment.

In Fig. 1, a section through two components 1 and 2 adjacent in the direction of water flow is shown, whereby element 1 has a groove 4 and element 2 has a tongue 3 for a tongue and groove construction of the two adjacent

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Elements 1,2. The two adjacent elements 1 and 2 are put together in such a way that when the roof surface is arranged at an angle, the tongues 3 are on the upper edge 5 of elements 1,2 and the grooves U are on the lower edge 6. The water running down on the surface now passes from one element 2 to the next element 1. The water also penetrates into the joints between elements 1,2 and reaches the inside 5 of the elements via the tongue/groove connection. In order to allow the water penetrating into the joints to drain away again, 3 drainage tracks 8 are arranged on the bottom 7 of the tongue, which rise from the edge 5 with a slight incline to the top of element 1. Between the drainage tracks 8, parts 9 of unchanged height and contact edge are provided. These parts 9 serve as a base for fastening strips or pressure distribution or ventilation strips or the like for the upper roof covering (not shown).

Fig. 2 shows a plan view of the elements 1, 2 shown in Fig. 1. The groove 12 and the tongue 13 for the connection to the elements on the side can be seen on the side edges 10, 11. In order to drain the water running off at these connection points to the outside, a drainage track 8a is arranged directly next to the tongue 13. In particular, however, a channel 31 is arranged on the foot 32 of the tongue 3, which extends over the entire length of the tongue 3 on the long side. The tongue 3 is now formed in the area of the corner by the correspondingly shaped upper wall of the groove ^1J on the transverse side 6. and overlaps in this corner area the tongue 3 of the feasible component which is inserted into the groove U and reduced to about half the thickness. This spring 3 of the neighbouring element already has the mentioned channel 31 and leads it along a wedge-shaped formation 32 of the spring 3 with an oblique rise into the channel 31 along the usual spring 3. The channel 31 and the drainage slope 32 including the overlapping spring part 33 ensure an excellent discharge of any

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water that has already penetrated from the joint area. On the opposite side of the component, the top of the tongue 3 is extended into the groove area and shaped in such a way that it forms a reduced-thickness part of the upper wall of the groove U. This reduced-thickness part H ¹ I is overlapped by a groove part k2 that is also reduced in thickness. In this way, the penetration of water is also reduced in this area. The tongue part 3 of the adjacent Piu element, which is snapped into this longitudinal groove H, again has the channel 31 and can drain off any water that has penetrated.

Fig. 3 shows another embodiment for draining the water running off from the joint area. This design is preferably used together with the drainage tracks in Fig. 1 and Fig. 2, but can also be used to advantage without these drainage tracks. The beginnings of channels 15 are arranged directly next to the edges 10, 11, which initially run diagonally to the direction of the water flow and then open into flat or horizontal parts. This ensures that the water running off is quickly removed from the joint area and that the excess water is passed on to the next element, while smaller amounts of water remain on the surface of the element in the channels. In order to prevent water from being forced into the joints when there is too much water, longitudinal grooves 151 are provided on the surface, which connect the diagonally running grooves and guide the water to the drainage tracks 8 of the next (lower) component.

Claims (1)

- 1 _ Claims Panel-shaped building element with tongue and groove on the opposite longitudinal sides and with tongue and groove on the opposite transverse sides, for connecting adjacent similar building elements to form an inclined surface, in particular thermal insulation panel for ventilated roof constructions, characterized in that that drainage paths (8,15) for draining liquids such as condensate from the joint area (5,6) of adjacent components (1,2) are arranged in the upper side (ü) of the components (1,2), that tongues (3) with a spherical cross-section and grooves (4) with a cross-section corresponding to this shape are provided and the walls of the tongue and groove are designed in such a way that the connection is simultaneously a snap connection and represents an airtight connection through surface compression, that grooves (4) and tongues (3) are formed without interruptions on each side edge of the components and are formed in the transition area of the corners of the component so that the component has a square shape, that the grooves (4) and tongues (3) of the long sides are weakened on the lower edge of the component in the direction of water drainage on their underside and on the opposite edge of the component on their upper side, so that when joining adjacent components the parts overlap in such a way that their thickness in the overlapping area does not exceed the dimensions of the tongues (3) and grooves (4) x·&zgr; unweakened area, that the spring part weakened at its upper side is designed as a water drainage track on its upper side, ind-sm its thickness increases slowly from the front edge to the full spring strength. 46H3189
- 2 - 2. Construction element according to claim 1, characterized in that the drainage path is a channel (31) arranged in the water drainage direction on the spring base (32) which extends over the entire length of the longitudinal side of the construction element* 3. Construction element according to claim 1 or 2, characterized in that the drainage paths (8, 15) are channels (15) which run from the upper transverse sides (5) of the construction elements (1, 2) to the lower transverse side (6). ^. Component according to claim 3, characterized in that the springs (3) of the transverse sides at the upper edge of the component and that the run-off paths (8) Start at the top of the spring (3) and diagonally to rise to the top (0) of the components (1,2) and dor*" are connected to the lower edge (6) of the component via grooves (8). 5· Component according to one of claims ^2-1 J, characterized in that a plurality of grooves (15) arranged obliquely to the longitudinal sides are provided on the upper side (0) of the component (1,2). 6, structural element according to one of claims 1-5, characterized in that the channels or guide profiles (J ¹ J, 15) arranged obliquely to the longitudinal sides (10, 11) are connected to one or more channels (8) connecting the transverse sides. 7. Component according to claim 6, characterized in that the drainage channels (8) arranged on the upper side (0) of the component (1, 2) are split in a fan shape in the region of the lower transverse side (6) into several channels (81) which end at the points on the transverse side (5) at which drainage paths (8) of the next snapped-in component have their beginning. - '3 - H6H3189 8. Component according to one of claims 1-7 , characterized in that the wedge-shaped rise region of the run-off path on the spring (3), which is brought about by weakening the spring (3) in the region of the longitudinal side facing the upper transverse side (5), extends over a length of at least 10 cm, in particular ¹¹ - 15 cm. 9. Component according to one of claims 1-8, characterized in that in the region of the corner of the component (1,2) between the longitudinal side groove and the transverse side tongue, the wall of the longitudinal side groove (Δ) facing the upper side (O) forms a part of the transverse side tongue (3) which is overlapped by the wall of the longitudinal side groove of the adjacent, upper component (1,2). 10. Component according to claim 9, characterized in that in the region of the corner of the component between the transverse side groove and the longitudinal side tongue, the wall of the transverse side groove facing the upper side (0) forms part of the longitudinal side tongue (3) which overlaps the wedge-shaped tongue part of the adjacent component (1,2). 11. Component according to claim 10 or 11, characterized in that the wall of the groove effective in the region of the tongue has a reduced thickness, in particular half the thickness of the tongue. 12. Component according to one of claims 1-11, characterized in that the upper side (0) is coarsely formed in order to be able to hold water for evaporation.