EP1612345B1 - Reinforcing material for roofing and building surfaces, and method of forming a sealing layer - Google Patents

Description

The invention relates to a reinforcement sheet for the production of a sealing layer of roof and building surfaces with a latticed, a bottom and a top having layer. Furthermore, the invention relates to a corresponding sealing layer on a roof or building surface to be sealed with a arranged on the surface to be sealed reinforcement track, which is surrounded by hardened, bituminous melt.

The reinforcing sheet and sealing layer according to the invention can be applied to any surface, for. B. on concrete, insulation, wood, mineral fiber, foam etc.

For the purpose of sealing so-called sealing sheets are known from the prior art, which are laid using a hot bituminous melt on the surfaces to be sealed, in particular concrete support ceilings. As soon as the bituminous enamel has hardened, the waterproofing membrane adheres to the entire surface of the roof, building or insulation surface.

When used roof or building surfaces, especially green roofs, patio roofs or underground car park ceilings, there have been often leak problems in the prior art, which are remarkable in that the seal after the completion of the construction is no longer directly accessible. Since localization of the damaged area usually requires that considerable roof or building structures must be cleared, such as gravel, thermal insulation material, topsoil, plate coverings, etc., therefore, in order to avoid such an effort, from the outset as possible full-surface bonding of the seal with the substrate sought. However, these full-surface bonds are subject to the risk of cracking.

To avoid such cracking, it is for example from the DE 44 13 624 A1 It is known to place on the surfaces to be sealed prior to application of the bituminous melt initially a reinforcement sheet in the form of a fabric or gel, which floats slightly when poured over with the bituminous melt and is completely enveloped by the melt. Immediately after pouring the melt, before it cures, a sealing sheet is laid over it. In this way, a sealing composite of waterproofing membrane, melt and reinforcing sheet is created. A latticed reinforcement web, especially in combination with elastomer bitumen or plastomer bitumen, noticeably reduces the risk of cracking.

Although the seal thus produced has a good mechanical stability, but is relatively difficult to produce, since first the reinforcement sheet must be spread completely on the surface to be sealed. Especially in strong winds, the spreading of the relatively light reinforcement track is a considerable additional expense.

Irrespective of the fact that the wind considerably complicates the laying of rebars, a further problem is that when pouring over the rebars with bituminous enamel, the rebar, which was previously immediately on the surface to be sealed, has floated in some places. Depending on the temperature or consistency of the melt, it may also happen that when applying the sealing layer and areas of the reinforcing sheet are pressed down again on the surface to be sealed and touch them. In general, therefore, the reinforcing web after completion of the sealing process will not have a uniform distance from the surface to be sealed, but rather wavy, ie floating in some places, at other locations touching the surface to be sealed, run.

For this reason, a waterproofing membrane with an integrated, exposed reinforcement track has been developed, with a plurality of fixators holding the waterproofing layer and the reinforcement track together. That's how it describes WO 01/92660 A1 A construction of a waterproofing membrane consisting of a lower side arranged reinforcement web of a fabric and a sealing layer disposed above, a sealing of the roof or building surfaces done by first the bituminous melt is poured onto the surface to be sealed and then attached the waterproofing membrane with the underside by means of the fixators Grid is rolled over the melt and applied to it. In this case, spacer elements can be arranged on the underside of the reinforcement track.

The invention is therefore based on the technical problem of providing a reinforcing track, with which the production of a stable and fully adhesive sealing layer is made possible in a simple manner.

The above-indicated technical problem is solved according to the invention in a reinforcement sheet according to the preamble of claim 1, characterized in that spacer strips are attached to the underside of the grid-shaped layer. On This way it is ensured that the lattice-like layer serving as a reinforcement already receives a defined distance to the surface to be sealed and / or to a possible further position to be arranged on the upper side when it is being rolled out. If, after the roll-out of the reinforcing sheet, the hotmelt serving for sealing, preferably bituminous or consisting of a liquefiable plastic, is poured onto the reinforcing strip, the hotmelt is distributed uniformly below the latticed layer, but also above it, the spacer strips ensuring that the lattice-like layer maintains its predetermined distance to the underlying surface.

On the one hand, the spacer strips prevent the grid-shaped layer from sinking during the sealing process, in particular when pressure is exerted on the reinforcing web surrounded by the melt by applying a separate, further sealing layer. On the other hand, the spacer strips, by virtue of their own weight, prevent the lattice-like layer from floating with the molten mass when it is poured over. In other words, the spacer strips ensure that the distance between the grid-shaped layer and the surface to be sealed is substantially the same everywhere.

Advantageously, the spacer strips of bitumen, in particular cold-self-adhesive bitumen, or plastic, in particular flexible plastic, which is advantageously adhesive. The advantage of bitumen or adhesive plastic is that when rolling out the reinforcement sheeting automatically adheres to the surface to be sealed. Thus, in the event of wind, the reinforcement track can no longer move or slip. Likewise, that affects Net weight of the reinforcement sheet according to the invention favorable to excessive wind susceptibility.

Spacer strips made from bitumen have the further advantage that, given a suitable temperature of the bituminous molten material which is poured out during the sealing process over the reinforcement track, the spacer strips melt and thereby form an optimum connection with the molten mass.

So that when using adhesive spacer strips, for example made of bitumen or plastic, the reinforcement sheet rolled up to save space after their preparation and can be easily rolled back later, a release agent is preferably provided on the spacer strips. The release agent, which may consist of sand or talc, but may also be a release film, is preferably provided on the side facing away from the lattice-shaped layer.
Of course, the release agent can also after the spacer strips are connected to the reinforcement web, be applied to both sides of the spacer strips.

An advantage with non-self-adhering spacer strips is that the reinforcing sheet can rise a little when poured with the molten mass so that the molten mass can also flow below the spacer strip. As a result, bonding in the area of the spacer strips also occurs, preferably over the entire surface, through the molten mass. As a result of the weight of the reinforcement track - as already mentioned above - there is no complete floating of the reinforcement track.

The spacer strips can form a variety of shapes or gradients. In particular, they run in the longitudinal direction the reinforcement track. Such a reinforcement track is particularly easy to manufacture. But it is also conceivable that the spacer strips extend transversely to the longitudinal direction, which evt1. Rolling up the reinforcement track in the longitudinal direction facilitates. Even a diagonal course is conceivable.

The spacer strips may be straight, but also arcuate or wavy. Advantageously, the spacer strips all have the same distance from one another, and preferably also have the same shape, in particular the same length and / or the same width and / or the same thickness. However, it is also conceivable that the width and / or the thickness varies within a spacer strip. For example, it is conceivable that a higher adhesive effect is required in the edge area of the reinforcement track than in the middle area. In this case, each spacer strip would be thicker or wider towards the edge region than in the middle of the reinforcing strip.

The grid-like position of the reinforcing sheet can have very different configurations, as long as it is ensured that the grid openings are large enough to allow unhindered flow through the bituminous melt during the sealing process. The grid-shaped layer, which may be a woven or knitted fabric, is preferably a polyester fabric, a glass fiber fabric or a metal mesh.

In order to simplify the winding and unwinding of the reinforcement track, the grid-shaped position should be flexible.

According to a further teaching of the present invention, the object is also achieved with a sealing layer according to Oberbegritf of Claim 22 achieved in that the reinforcing sheet is formed as described above and is arranged on the surface to be sealed, that the spacer strips between the surface to be sealed and the grid-shaped layer are arranged. Such a sealing layer is produced by first designing the above-described reinforcement track so that the spacer strips set the predetermined distance between the grid-like layer and the ground, wherein the bituminous melt is then poured out over the reinforcement track. It is now possible according to the invention to apply an additional sealing layer prior to curing of the molten mass and thereby to produce a 2-layer seal. This would then consist of the previously described reinforcement track, which is surrounded by hardened, bituminous enamel, as well as a separate sealing layer arranged above it.

Of course, it is also conceivable to dispense with the separate sealing layer and to provide the seal by a single-layer waterproofing membrane, which consists only of the above-described reinforcement track and the cured, bituminous melt.

Furthermore, the above-indicated technical problem is also solved by a method according to claim 24, wherein a reinforcing strip with a lattice-shaped layer and with spacer strips according to one of claims 1 to 20 arranged on a roof or building surface, in particular rolled up and in which the after the placement of the rebar, a sealing compound is poured, the spacer strips ensuring that the lattice-like layer maintains its predetermined distance from the underlying roof or building surface.

As a result, a complete sealing layer is produced in one operation by the rolling up of the reinforcement track and the subsequent casting with the melt.

In a preferred manner, the space below and at least partially the space above the grid-shaped layer can be filled with the melt, at least in part, preferably a bitumen or a liquefiable plastic being used as the cast-on melt.

Fig. 1

eine perspektivische Ansicht eines Ausführungsbeispiels einer erfindungsgemäßen Bewehrungsbahn und

Fig. 2

einen schematischen Schichtaufbau eines Ausführungsbeispiels einer erfindungsgemäßen Abdichtungslage.

The invention will be explained in more detail below with reference to an embodiment, reference being made to the accompanying drawings. In the drawing shows

Fig. 1

a perspective view of an embodiment of a reinforcing sheet according to the invention and

Fig. 2

a schematic layer structure of an embodiment of a sealing layer according to the invention.

Fig. 1 shows an embodiment of a reinforcing sheet according to the invention for the production of a sealing layer for roof and building surfaces 3. The reinforcing sheet according to the invention has a grid-shaped layer 1 of a flexible polyester fabric and on the underside of this grid-shaped layer 1 a plurality of parallel spacer strips 2. The spacer strips 2 are made of bitumen and sanded to avoid unintentional sticking to other objects or in the rolled-up state with the reinforcement sheet itself.

In the case shown, the spacer strips 2 are arranged in the longitudinal direction of the reinforcing web, namely at the same distance from each other. The straight spacer strips 2 all have the same shape, in particular the same length, width and thickness. The spacer strips may also be arranged at an angle to the longitudinal direction, preferably transversely at right angles to the longitudinal direction.

In order to produce a sealing layer on a roof or building surface 3, the reinforcement strip is first rolled out or laid out on the surface 3 to be sealed, so that the spacer strips 2 define a defined distance between the latticed layer 1 and the surface 3. Subsequently, bituminous melt 4 is poured evenly over the reinforcement track. The bituminous mass 4 is distributed under the grid-shaped layer 1 between the spacer strips 2, but also above. In this way, the grid-shaped layer 1 of the reinforcement track is evenly embedded in a Bitumenschieht 4.

Finally, a further, separate sealing layer 5 can be rolled over the coated by the bituminous mass 4 reinforcement track. The latter is not absolutely necessary because due to the invention. Design of the reinforcing sheet already the surrounding of the melt 4 reinforcing sheet ensures a good seal with high mechanigcher stability.

A schematic layer structure of an embodiment of a sealing layer according to the invention shows Fig. 2 , In the illustrated layer structure is a 2-layer seal, wherein the first layer of a reinforcement sheet with a grid-shaped layer 1 and spacer strip 2, which in turn is surrounded by hardened, bituminous melt 4. The second layer is formed by a separate sealing layer 5, which has been applied to the first layer before the melt 4 is cured. Such a 2-layer construction is particularly suitable for the sealing of roofs and building surfaces 3, which are exposed to high demands such as running water, cold, heat, mechanical stress, etc.

Claims (27)

1. Reinforcement web for producing a sealing layer for roof- and construction surfaces (3) with a grid-type layer (1), with a lower and an upper surface,
   characterised in that
   spacer strips (2) are arranged on the upper- and/or lower surface of the grid-type layer (1).
2. Reinforcement web according to claim 1,
   characterised in that
   the spacer strips (2) are made of bitumen.
3. Reinforcement web according to claim 2,
   characterised in that
   the bitumen is a cold-self-adhesive bitumen.
4. Reinforcement web according to claim 1,
   characterised in that
   the spacer strips (2) are made of plastic, in particular of flexible plastic.
5. Reinforcement web according to claim 4,
   characterised in that
   the plastic is a bondable plastic.
6. Reinforcement web according to one of claims 1 to 5,
   characterised in that
   a parting means is provided on the spacer strips (2).
7. Reinforcement web according to claim 6,
   characterised in that
   the parting means is provided on the side of the spacer strips (2) facin; away from the grid-type layer (1).
8. Reinforcement web according to claim 6 or 7,
   characterised in that
   the parting means is sand or talcum.
9. Reinforcement web according to claim 6 or 7,
   characterised in that
   the parting means is a separating foil.
10. Reinforcement web according to one of claims 1 to 9,
    characterised in that
    the spacer strips (2) run in the longitudinal axis of the reinforcement web.
11. Reinforcement web according to one of claims 1 to 9,
    characterised in that
    the spacer strips (2) run transversely to the longitudinal axis of the reinforcement web.
12. Reinforcement web according to one of claims 1 to 11,
    characterised in that
    the spacer strips (2) are straight.
13. Reinforcement web according to one of claims 1 to 12,
    characterised in that
    the spacer strips (2) are curved.
14. Reinforcement web according to one of claims 1 to 11,
    characterised in that
    the spacer strips (2) are undulating.
15. Reinforcement web according to one of claims 1 to 14,
    characterised in that
    all the spacer strips (2) are equidistant from each other.
16. Reinforcement web according to one of claims 1 to 15,
    characterised in that
    all the spacer strips (2) take the same form, in particular the same length and/or the same width and/or the same thickness.
17. Reinforcement web according to one of claims 1 to 16,
    characterised in that
    inside each spacer strip (2), the width and/or the thickness varies.
18. Reinforcement web according to one of claims 1 to 17,
    characterised in that
    the grid-type layer (1) is a polyester fabric, glass fibre fabric or metal grid.
19. Reinforcement web according to one of claims 1 to 18,
    characterised in that
    the grid-type layer (1) is flexible.
20. Reinforcement web according to one of claims 1 to 19,
    characterised in that
    the reinforcement web can be rolled up in the longitudinal direction.
21. Reinforcement web according to one of claims 1 to 20, characterized in that spacer strips are arranged on the top of the grid-type layer.
22. Sealing layer on a roof- or construction surface (3) to be sealed with a reinforcement web, arranged on the surface to be sealed (3), said reinforcement web being surrounded by a hardened, bituminous melting mass (4), characterised in that the reinforcement web is configured according to one of claims 1 to 20 and arranged on the surface to be sealed (3) in such a way that the spacer strips (2) of the reinforcement web are arranged between the surface to be sealed (3) and the grid-type layer (1) of the reinforcement web.
23. Sealing layer according to claim 22,
    characterised in that
    an additional sealing layer (5) is applied on top of the reinforcement web.
24. Method for producing a sealing layer on a roof- or construction surface to be sealed,

    - in which a reinforcement web with a grid-type layer and with spacer strips according to one of claims 1 to 21 is arranged on a roof- or construction surface, in particular rolled-up, and

    - in which, after the arrangement of the reinforcement web, a melting mass serving as sealant is poured on,

    - wherein the spacer strips ensure that the grid-type layer maintains its pre-determined distance from the underlying roof- or construction surface.
25. Method according to claim 24,
    in which the space under the grid-type layer is filled, at least partially, and the space above the grid-type layer is filled, at least partially, with the melting mass.
26. Method according to claim 24 or 25,
    in which a bitumen or a liquéfiable plastic is used as the poured melting mass.
27. Method according to one of claims 24 to 26,
    in which an additional sealing layer is applied on top of the melting mass which has not yet completely hardened.

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