CH707041A2

CH707041A2 - Protection-hydraulic isolation sub-roof tape or wall tape for e.g. slanting roof, has base whose sides and surface are provided with sealing layers, and connector overlapped with translation part, where water entry is prevented into base

Info

Publication number: CH707041A2
Application number: CH01645/13A
Authority: CH
Inventors: Jan Cerovsky
Original assignee: Juta A S
Priority date: 2012-09-27
Filing date: 2013-09-25
Publication date: 2014-03-31
Also published as: CH707041B1; CZ25307U1; DE202013104303U8; AT13861U1; DE202013104303U1

Abstract

The tape has water-impermeable and steam-permeable sealing layers (1, 2) formed on TPU base. Thickness of the sealing layers is measured such that actual tapes are connected in a waterproof- and vapor-transmissive manner by thermal welding or source welding or by sticking in a connector. Two sides and an entire surface of a water-permeable- and steam-permeable base (3) are provided with the sealing layers. The connector is overlapped with an overlapped translation part (5), where water entry is prevented into the base in a fluid state. An independent claim is also included for a slanting roof.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective hydro-insulated roof or wall panel, for sloped roofs or for building walls, with a water-permeable and vapor-permeable base layer and with the water-impermeable and vapor-permeable TPU -based sealing layers Additional stiffening layer.

[0002] The invention also relates to the roof or wall with a series of slatted and welded water-impermeable and vapor-permeable under-roof or wall tapes.

PRIOR ART [0003] The roof ropes have first the task of protecting the uncovered roof against rain penetration. After laying the hard roofing, it is necessary to prevent the penetration of the flying snow, the spraying water, the dew and the fine dust particles into the heat insulation. At the same time, it is necessary to discharge the water vapor, which can originate as an excess of moisture from the building and from the sheltered rooms, through the diffusion heat insulation and the under-roofing tape into the environment. In this case, the entire heat insulation, which is fastened between the roof racks, can serve as a temporary moisture accumulator, care being taken that the temperature of the dew point of the condensed water is not exceeded.

The wall band has the task of protecting the wall construction against the penetration of the wind, rain, dust, snow and splashing water into the heat insulation, that is, the tape should be watertight. Further, this tape should be vapor-permeable to dissipate excess moisture from the wall construction.

[0005] As long as the roofing strip or wall strip is impermeable to the water vapor or is very poorly permeable, the corresponding excess of moisture on the strip can condense in the roof space or in the wall construction, the heat insulation absorbing moisture and deteriorating its mode of action.

[0006] In the case of the wall tapes, among other things, the watertight under-roof tapes and the tapes resistant to the rain penetration are distinguished. The roofs, as a rule, resist the rain, but in the case of extremely exposed locations or in particular weather conditions, the penetration of the heavy rain and the snow can not be completely prevented. The space under the roof or roofing acts as a protection against rain as long as its surface, including the weld seams and the junctions between the actual under-roof tapes, resist the rain. In the case of roof coverings, which are intended to withstand rain, it is necessary to carry out safe passageways, mounting parts and inserts against the penetration of rainwater.

[0007] In order to make a roof covering watertight, all passages, mounting parts and inserts must be made watertight, so that the entire roof cover is impermeable to water. Only then can we speak of a waterproof roof construction. The laid roofs, as a rule, resist the rain, and among other things, they can not entirely prevent the penetration of the heavy rain.

[0008] The traditional plastic tapes are used for the execution of the watertight roof cover, for which TPU tapes, ie the thermoplastic, soft and compliant, readily processable, microorganism-resistant elastomers based on urethane are suitable. Joining is used for the mutual bonding of two adjacent TPU under-roof bands, which requires the presence of the TPU adhesive on the layer or in the layer.

[0009] There are also TPU-based TPU-based tapes (olefin-based thermoplastic elastomers). Such under-roof tapes can also be thermoset-welded.

[0010] In addition to the water resistance, the sealing layer also has the further property of water vapor permeability, which is also referred to as diffusion capability. This means that the sealing layer is impermeable to water which can reach the roofing band, but it can pass the water vapor from the interior of the building with regard to the diffusion capability and thereby prevent the thermal insulation of the roof arch, The wall or other objects present in the interior of the building are influenced by an excessively high moisture content.

[0011] The under-roof tapes and the wall tapes often have a support layer which is water-impermeable and water-vapor-permeable. The connection of the layers consisting of the support layer and the plurality of sealing layers leads to water-tightness in the case of one or more waterproof and vapor-permeable layers, whereby a roof covering can be realized which is open for diffusion and at the same time impermeable to water.

[0012] The prior art tapes have the disadvantage that the watertight and vapor-permeable tapes are relatively expensive; in particular, it is necessary to use adhesives in the watertight and diffusion-free connection between the tapes with the sealing layers on TPU basis. On the other hand, the TPU-weldable TPU-based undercoats do not have the advantages of the TPU layer, in particular the resistance to water and temperature, a soft and compliant structure, and therefore good processability, as well as resistance to microorganisms.

DISCLOSURE OF THE INVENTION The object of the invention is to eliminate the drawbacks mentioned and to provide a new construction of the protective hydroinsulating roofing or wall tape for sloped roofs or for building walls which prevents the formation of the watertight and vapor-permeable roof covering or an arrangement of the Waterproof wall tapes. According to the invention, this object is achieved by a new construction of the protective hydroinsulating roofing or wall band for inclined roofs or for building walls with a water-permeable and water-vapor-permeable base layer and with the water-impermeable and water-vapor-permeable TPU-based sealing layers and optionally with an additional stiffening layer In that the thickness of the sealing layers is selected such that, Characterized in that the watertight and vapor-permeable strips are connected by means of thermal welding or source welding, or by means of gluing, to the further sub-roofing strip of the same type. The supporting layer is provided on both sides and over the entire surface with the sealing layer. The connection is created by means of an overlap edge, which is connected to another sub-roof band.

[0014] The term "an inclined roof" according to DIN 1055 is understood to mean a roof pitch of more than 7 degrees. In some countries, this term applies to roofs with an inclination of 5 degrees and higher. In spite of the inclination of the roof, it is advantageous or even necessary to provide not only a rain-resistant covering tape, but also a watertight roofing tape in order to prevent the penetration of the flying snow, the heavy rain, the ice load, the snow layers and the like.

[0015] A water-tight and water-vapor-permeable TPU having the above-mentioned advantages is used as the material which is particularly preferred in such a roofing sheet. In the embodiment according to the invention, it is possible to prevent the adjacent sub-roof bands by thermal or swell welding, thereby making them watertight and water vapor permeable.

[0016] TPUs within the meaning of the invention also include the mixtures of the substances in a proportion of at least 60% by weight. TPU and 40% wt. Fillers. A corresponding filler can be used for material and cost savings.

[0017] In order to determine whether it is possible to designate the roofing tile as water-tight, it is checked whether DIN 1928 and DIN 20811 are satisfied. Depending on how the tests start, the tapes are considered as waterproof.

This corresponds to the requirements of the Central Association of the German Roofing Industry (ZVDH), which defines the impermeability to water, and thus also the application of the invention, for the tests of severe rain as defined by the Technical University of Berlin.

The standard which must fulfill the diffusion capability is DIN 4108, part 3. The vapor permeability is defined by the value sd - the diffusion-equivalent air layer thickness. A limit value for the diffusion unit is defined here as 0.5 m. A layer with a sd value of less than 0.5 m is usually referred to as a diffusible layer.

[0020] Preferably, even a sd value less than 0.2 m is selected. According to DIN 68800, it is necessary to hold down to 0.2 m and to consider the corresponding layer as a diffusible when a chemical preservation agent is dispensed with. Particularly advantageously, a sd value of the canopy is less than 0.2 m and between 0.02 m and 0.2 m.

In the case of the thermal welding, the temperature of the TPU layer is increased in such a way that this layer connects with a further corresponding layer and is thus homogeneously welded. In the source welding, a swelling agent is added to the sealing layer, for example, tetrahydrofuran (THF), which swells the TPU and thus allows a mutual welding of the adjacent sub-rooftops. Benzene or benzine can also be used, for example. However, THF is preferred to benzene or benzine or other solvents because of the short dissolution time. However, the preferred solvents can generally be in the group of alkanes, alkenes, aromatic compounds, organic compounds, chlorine, alcohol, ester, ether or ketone.

The roofing tile according to the invention advantageously consists of a water-permeable and vapor-permeable base layer, for example of nonwoven fabric, and of two water-impermeable and water-vapor-permeable sealing layers, for example of TPU, and does not require either an additional adhesive layer or a bonding agent Another sub-roofing band, still another layer which increases the stability of the roofing band.

In the case of the under-roof tapes according to claim 1, the supporting layer ensures the stability of the under-roofing band, wherein at least one of the sealing layers ensures that the under-roofing strip is watertight. The sealing layers are dimensioned in such a way that the roofing strip is also permeable to the water vapor. The material used on the TPU-base for the sealing layers is relatively expensive, so that it is usually ensured that the sealing layers are made as thinly as possible in the context of the given task, with regard to their sealing properties.

The thickness of the sealing layers is increased compared to the prior art, so that the thermal welding is also possible with the sealing layer on a TPU basis, without damaging the sealing layer or the support layer during the thermal welding. For this purpose, however, in the case of the conventional under-roofing tape, a correspondingly thin sealing layer would occur, which is why the usual under-roofing tapes can not be connected to each other by thermal welding. This also applies to the welding of the sealing layers with a small thickness, on a TPU basis, which is not applicable for the same reason.

[0025] In order to be able to effectively bond the adjacent layers of the under-roof tapes together, the roofing strip further includes an overlapping part where the watertight layer is arranged overlapping on one side or on both sides over the further layers and thus allows a water- Connection. This connection also prevents water from entering the middle support layer, which is water permeable and also water vapor permeable. It is also possible to form a cuff from the lower canopy and weld it directly with the basic canopy.

However, the overlap part does not have to be directly connected to the further sub-roof band or wall band or to a further overlapping part. A free overlap is also possible, which forms a water loop and prevents the penetration of the water into the inner supporting layer, which is vapor-permeable and water-permeable in particular at the small roof inclinations.

Since the roofing band or wall band according to the invention is provided on both sides with the water-permeable and water-vapor-permeable sealing layer, which can be welded directly to the sealing layer of another under-roof band, it is possible to connect a roofing band with another roofing band watertight Roof arch, which is completely watertight and water vapor permeable. The two-sided full-area sealing layer of the under-roofing band and its overlapping parts thereby make possible a particularly effective connection between the adjacent under-roofing tapes, since it is not necessary here to apply an additional adhesive or another connecting element to the adjacent roofing tapes.

The terms "impermeability to water" and "water vapor permeability", possibly "diffusion capability" refer to the guidelines of the building inspectorate, which apply, for example, to the roofs in Germany, the corresponding standards are DIN 68800 and DIN 4108, for example 3, and in this connection, it is necessary to apply them to define the above characteristics.

[0029] In an advantageous form of the embodiment, the material TPU is the aromatic TPU at least in a sealing layer. The aromatic TPUs are particularly suitable for welding and have just the particularly advantageous above-mentioned properties of the TPU-based sealing layer. Advantageously, the sealing layers always have a thickness of at least 0.07 mm, in an advantageous embodiment 0.07 mm to 0.2 mm, and in a particularly advantageous embodiment 0.07 mm to 0.14 mm. Such a thickness of the sealing layer of the under-roofing band is suitable for a mutual connection of the adjacent under-roofing bands by means of welding, without damaging the sealing layers or the supporting layer.

[0030] These carrier layers advantageously have an average surface weight of at least 70 g / m.sup.2, preferably 70 g / m.sup.2 to 200 g / m.sup.2 and in a particularly advantageous embodiment 70 g / m.sup.2 to 140 g / m.sup.2, m2. The corresponding surface weights mean that it is possible to join the two adjacent sub-roof strips by means of thermal welding or swelling welding, in contrast to the customary abovementioned sealing layers according to patent claim 1. The average surface weight of the canopy is determined on the entire surface of the canopy.

[0031] The overlapping part may have the same thickness and weight as the sealing layers as mentioned above, or this thickness and weight may be higher. The width of the overlapping part is selected such that it fulfills the functional capability of the water drainage, and in an advantageous embodiment the width is selected in the range 1 to 150 mm. In a preferred embodiment, nonwoven is selected as the backing layer. The nonwoven may be polyester fibers or blends of fibers containing polyester or derivatives thereof. The carrier layer made of non-woven fabric allows, on the one hand, a particularly simple production of the under-roofing tape, wherein the sealing layers can then be applied to the supporting layer present without the particular sealing layers having to be particularly stable. This makes it possible to effectively form even the large-area under-roofing tapes. The support layer also serves to assure safety in the laying of the under-roof tapes because they increase their strength, so that the under-roofing can easily support an adult human being if it occurs thereon.

[0032] In the case of increased mechanical demands on the roofing band or wall band, in addition to the vapor-permeable and water-permeable layer, a reinforcing grid or a reinforcing fabric is added as a further layer which increases the mechanical properties. This further layer is advantageously covered by the outer sealing layers, which ensure the water impermeability of the roofing band or of the wall band.

[0033] The thickness and weight of one or two waterproof layers need not be equal over the entire width of the material and may vary. This can be advantageously used for an improvement in the possibility of connecting the under-roof tapes and also for optimizing the Sd value of the vapor permeability of the product.

The roof according to the invention, as mentioned above, contains a plurality of the overlapping and welded waterproofing and water vapor permeable roofing tapes. In this case, the sealing layer of the first side of the under-roofing band is welded to the sealing layer of the second opposite side in such a way that the welding of the under-roofing bands is watertight and vapor-permeable and also secured by means of the overlapping part. Such a roof can be classified as waterproof according to the directives ZVDH and is therefore suitable for effective protection of the building even under particularly unfavorable climatic conditions.

Furthermore, such a roof is preferred, in such a way that the roofing strip is welded to the adjacent roof-top band substantially over the entire overlapped surface and is secured by means of the overlapping part. This contributes to the durability and tightness of the roof.

The wall according to the invention as mentioned above comprises a plurality of overlapping and welded watertight and water vapor permeable belts. The sealing layer of the first side of the strip is welded to the sealing layer of the second opposite side in such a way that the welding of the strips is watertight and vapor-permeable, and is also secured by means of the overlapping part.

BRIEF DESCRIPTION OF THE DRAWINGS [0037] The invention will be explained in more detail with reference to the figures and drawings.

FIG. 1 is a side view of the cross-section of the roofing slab for an inclined roof or the wall strip.

FIG. 2A shows, in the side view, the cross-section of the roofing slab for an inclined roof or the wall strip with a reinforcing layer.

FIG. 2B is a side elevational view of the cross-section of the roofing slab for a slanting roof or of the wall band also with a stiffening layer.

FIG. 3 shows, in the top view, two mutually connected lower roof tapes or two mutually connected wall tapes.

DESCRIPTION OF THE EXEMPLARY EMBODIMENTS FIG. 1 shows in a side view the cross-section of the roofing slab for an inclined roof or of the wall strip 10, 12 in an advantageous embodiment. On the upper side, namely on the first side of the support layer 3, a TPU-based first sealing layer 1 is also provided. On the lower side, namely on the second side of the support layer 3, there is a TPU-based second sealing layer 2. Furthermore, an overlapping part 5 adjoining the first sealing layer is shown.

FIG. 2A shows, in the side view, the cross-section of the roofing slab for an inclined roof or the wall strip with a reinforcing layer 4.

FIG. 2B shows in side view the cross-section of the roofing slab for an inclined roof or of the wall band also with a reinforcing layer 4. FIGS. 2A and 2B also show the overlapping part 5 as in FIG.

3 shows, in plan view, the connection of the first sub-band or wall band 10 and of the second sub-band or wall band 12, with a connecting surface 11 which ensures an arrangement of the watertight roof covering or an arrangement of the watertight wall bands.

The watertight and diffusible connection of the two strips 10 and 12 and the prevention of the water entry into the carrier layer 3 allows the band to be classified into the category of water-tight and diffusible.

[0043] The support layer 3 can, for example, be made of nonwoven textiles such as the nonwoven.

The thickness of the actual layers is not recorded in a scale or ratio in the figures so that, for example, the thickness of the first and second sealing layers 1, 2 can be the same or different. The same applies to the other layers.

Reference list 1 First watertight and vapor-permeable sealing layer 2 Second watertight and vapor-permeable sealing layer 3 Water-permeable and vapor-permeable carrier layer 4 Additional stiffening layer

Claims

5 Overlapping part 10 The first sub-roofing tape or the first walling 11 Completed connections of the first and second tape 12 The second sub-roofing tape or the second walling

1. A protective hydro-insulating roofing sheet for a slanting roof or a wall strip with a water-permeable and water-vapor-permeable base layer (3), and with the water-impermeable and watertight-permeable sealing layers (1, 2) on a TPU basis and optionally with an additional stiffening layer In that the thickness of the sealing layers (1, 2) is selected in such a way that the actual strips (10, 12) can be connected to a connection (11) in a watertight and vapor-permeable manner by means of thermal welding or swelling welding or by gluing, 3) rests against the first and second sealing layer (1, 2) on both sides and over the entire surface, and the resulting compound (11) is also overlapped with an overlapping part (5)Which also prevents water penetration into the support layer (3).

2. The roofing tape or the wall tape according to claim 1, characterized in that the TPU is at least one sealing layer and advantageously the two sealing layers (1, 2) is an aromatic TPU.

3. The under-roofing tape or the wall tape according to claim 1, characterized in that it has, on one side or on both sides, an overlapping part (5) preventing the water entering the supporting layer.

4. The under-roof band or the wall band according to claims 1 to 3, characterized in that the overlapping part (5) is 1 to 150 mm in width, advantageously in the range 10 to 60 mm.

5. The under-roof band or the wall band according to claims 1 to 4, characterized in that the overlap part (5) can be connected to a further under-roof band or wall band or the overlap part (5) by means of thermal welding or swelling welding, or by gluing, And this connection is watertight and vapor-permeable.

6. The under-roofing tape or the wall tape according to claim 1, wherein the sealing layers (1, 2) each have a thickness of at least 0.07 mm, and in an advantageous embodiment 0.07 mm to 0.2 mm and In a particularly advantageous embodiment have 0.07 mm to 0.14 mm.

7. The under-roofing tape or the wall tape according to claim 1, wherein the sealing layers (1, 2) always have an average surface weight of at least 70 g / m 2, and in an advantageous embodiment 70 g / m 2 to 200 g / m 2 And in a particularly advantageous embodiment 70 g / m 2 to 140 g / m 2.

8. A roof with a series of overlapping and welded waterproofing and water vapor permeable under-roofing tapes according to one or more of the above-mentioned claims, characterized in that the sealing layers (1,2) of the first canopy layer (10) ) Are welded in such a way that the strips (10, 12) have welded connections (11) which are watertight and water vapor permeable, and that these connections (11) are overlapped with the overlapping parts (5) Prevent the water inlet in the liquid state in the support layer (3), or discharge the water on the slanting roof.

9. The roof according to claim 8, characterized in that the lower roof bands (10, 12) are welded to the adjacent lower roof bands (10) substantially over the entire overlapped surface.

10. A wall with a row of overlapped and welded watertight and water vapor permeable wall tapes according to one of the preceding claims, characterized in that the sealing layers (1, 2) of the first wall strip (10) are provided with the sealing layers (1,2) (11) are overlapped with an overlapping part (5), which penetrate the water into the carrier layer. (DE). WIPO Home services World Intellectual Property Organization (3) or dissipate the water.

11. The wall according to claim 10, characterized in that the actual wall bands (10, 12) are welded to the adjacent wall bands (10) essentially over the entire overlapped surface.