DE202013104303U1 - Protective hydro-insulating under-roof or wall tape - Google Patents

Abstract

Protective hydro-insulating sub-roof tape for a sloping roof or wall tape with a water-permeable and water-vapor-permeable base layer (3) and with water-impermeable and water-vapor-permeable sealing layers (1, 2) based on TPU and optionally with an additional stiffening layer, characterized in that the thickness of the sealing layers (1, 2) is dimensioned such that the actual tapes (10, 12) can be connected in a watertight and vapor-permeable manner by means of thermal welding or source welding or by means of adhesive in a connection (11), the base layer (3) on both sides and over the entire area with the first and second sealing layer (1, 2) is provided, and the resulting connection (11) is also overlapped with an overlapped transmission ratio (5), furthermore preventing the entry of water into the supporting layer (3) in the liquid state.

Description

The invention relates to a protective hydro-insulating under-roof or wall tape according to the preamble of claim 1.

The invention can be used as a protective hydro-insulating under-roof or wall tape for sloping roofs or for building walls. The tape has a water-permeable and vapor-permeable support layer and water-impermeable and vapor-permeable TPU-based sealing layers and is optionally provided with an additional stiffening layer.

The invention further relates to a roof or a wall with a series of verblattend stored and welded waterproof and vapor-permeable roof or wall tapes.

The sub-roof tapes have the first task to protect the uncovered roof against rain penetration. After laying the hard roofing, it is necessary to prevent the penetration of flying snow, of splashing water, of condensation water, of fine particles of dust into the thermal insulation. At the same time, it is necessary to transfer the water vapor, which may be a surplus of moisture from the building and from the under-roof living spaces, to the environment through diffusion heat insulation and the sub-roof tape. In this case, the entire attached between the rafters heat insulation can serve as a temporary moisture storage, it being necessary to ensure that the temperature of the dew point of the condensed water is not exceeded. This can be prevented by laying a vapor barrier or layer which inhibits the penetration of steam into the roof structure.

The wall tape has the task to protect the wall construction against the ingress of wind, rain, dust, snow and splashing water in the heat insulation. This means that the tape should be waterproof. Furthermore, this band should be vapor permeable to dissipate excess moisture from the wall construction.

As long as the laid sub-roof tape or wall tape is impermeable or very impermeable to water vapor, the corresponding excess moisture can condense on the tape in the roof space or in the wall construction. The heat insulation can moisten, and in addition, their operation may deteriorate.

In the wall tapes, among other waterproof sub-roof tapes and resistant to rain penetration bands are distinguished. Although the roofs are usually resistant to rain, they can not completely prevent the ingress of heavy rain and snow in extreme locations or in special weather conditions. The space under the roof or the roof arch is effective as a protection against rain, as long as its area, including the welding and node points between the actual sub-roof strips resists the rain. In the roof arch that is to resist the rain, it is necessary to use safe passages, mounting hardware and inserts against the rain.

On the other hand, with watertight roof arches, all passages, mounting parts and inserts must be made watertight, so that the entire roof arch is impermeable to water. Only then can one speak of a watertight roof construction. The laid roofs usually resist only the rain and, among other things, they can not fully prevent the ingress of heavy rain.

Traditional watertight tapes are used to make the watertight roof arch. In particular, selected TPU tapes are suitable for this purpose, ie thermoplastic, soft and flexible, readily processable, microorganism-resistant, urethane-based elastomers. Bonding is applied to the interconnection of two adjacent TPU sub-roof tapes, which requires on the layer or in the presence of a TPU adhesive.

There are also under-roof tapes having a TPU-based sealant layer (olefin-based thermoplastic elastomers). Such sub-roof tapes can also be thermally welded.

In addition to water resistance, the sealing layer also has another property, a water vapor permeability, which is also referred to as openness to diffusion. This means that, while the sealing layer is impermeable to water that may come onto the sub-roof tape, it can allow the water vapor from the inside of the building to pass with respect to openness to diffusion. This prevents the heat insulation of the roof arch, wall or other objects inside the building from being affected by excessively high humidity.

The under-roof tapes and the wall tapes often have a base layer, which is permeable to water and permeable to water vapor. The compound of the layers consisting of the base layer and the plurality of sealing layers may in the case of one or more watertight and vapor permeable layers generally be waterproof. This makes it possible to realize a roof arch that is open to diffusion and at the same time impermeable to water.

The sub-roof tapes according to the prior art have the disadvantage that the watertight and vapor-permeable tapes can only be connected with relatively high costs. In the case of the waterproof and diffusion-open connection between the sub-roof tapes with the TPU-based sealing layers, additional adhesives are to be expected in particular. On the other hand, the TPU-based weldable under-roofing tapes do not have the advantages of the TPU layer. These include in particular the resistance to water and temperature, a soft and resilient structure and thus a good processability and also the resistance to microorganisms.

It is an object of the invention to overcome the drawbacks mentioned, and to provide a new construction of the protective hydro-insulating roof or wall tape for sloping roofs or for building walls, which allows formation of the effectively waterproof and vapor-permeable roof bow or an arrangement of waterproof wall tapes ,

The stated object is solved by the features of claim 1.

This is achieved in that the thickness of the sealing layers is dimensioned so that the actual bands are waterproof and vapor-permeable connected by thermal welding or sweat welding or by gluing with the other sub-roof tape of the same kind. The base layer is provided on both sides and full surface with the sealing layer. The actual connection is accomplished by means of an overlap margin adhered to another sub-roof tape.

The term "a sloping roof" after the DIN 1055 is a roof pitch of more than 7 degrees. In some states, this term covers roofs with a slope of 5 degrees and higher. Despite the pitch of the roof, it is advantageous or even necessary under certain weather conditions to provide not only a rain-resistant masking tape but also a waterproof sub-roof tape to prevent the ingress of blizzard, heavy rain, ice load, snow layers and the like.

As a material which is particularly preferred in such a sub-roof tape, a waterproof and water vapor-permeable TPU is used, which has the above-mentioned advantages. In the embodiment according to the invention, it is possible to mutually connect the adjacent sub-roof tapes by thermal or solvent welding. This makes them waterproof and permeable to water vapor, d. H. wherever the overlapping collar is advantageously used.

For the purposes of the invention, TPU also includes mixtures of substances with a content of at least 60% by weight of TPU and 40% by weight of filler. For material and cost savings, it is possible to use a corresponding filler.

In order to be able to designate the sub-roof tape as waterproof, it becomes weaker DIN 1928 and DIN 20811 examined. If the tests are positive, the bands are considered watertight.

This is precisely how the demands of the ZVDH for the impermeability to water are decisively defined, and thus also the application of the invention. This is verified by tests against heavy rain at the Technical University of Berlin.

The norm that must be open to diffusion is in DIN 4108, part 3 described. The vapor permeability is defined by the value Sd, the equivalent diffusion thickness. As a limit value for the diffusion unit here Sd <0.5 m is defined. A diffusion-open unit is then usually a layer whose value Sd is less than 0.5 m.

However, a value Sd of less than 0.2 m is preferred. After DIN 68800 it is necessary to adhere to Sd <0,2 m, in order to consider the corresponding layer as open for diffusion, if there is no chemical protection agent of wood. Particularly preferably, a value Sd of the sub-roof tape is less than 0.2 m, z. B. between 0.02 m and 0.2 m.

In thermal welding, the temperature of the TPU layer is increased in such a way that this layer is connected to another corresponding layer and thus homogeneously welded. In the solvent welding, a sealant is added to the sealant layer, for example, tetrahydrofuran (THF), which swells the TPU to allow mutual welding of the adjacent under-roof tapes. In addition, for example, benzene or gasoline can be used. However, THF is especially preferred over benzene or gasoline or other solvents because it requires a shorter dissolution time when applied. However, the preferred solvents can generally be classified into the group of alkanes, alkenes, aromatic compounds, organic compounds, chlorine, alcohol, esters, ethers or ketone.

The sub-roof tape according to the invention is advantageously made of a water-permeable and vapor-permeable support layer, for example of non-woven, and of two waterproof and water vapor-permeable sealing layers, for example of TPU, and requires neither an additional adhesive layer as a connecting means with another sub-roof tape yet another stability of the sub-canopy increasing layer.

In the sub-roof tapes of the invention, the support layer ensures the stability of the sub-roof tape, with at least one of the sealing layers ensuring that the sub-roof tape is watertight. The sealing layers are dimensioned so that the sub-roof tape is permeable as a whole for the water vapor. The TPU-based material used for the sealing layers is relatively expensive, so it is usually necessary to ensure that the sealing layers are made as thin as possible in terms of their given sealing properties.

The invention differs from this principle, and the thickness of the sealing layers is increased over the prior art. The thickness of the sealing layers is increased to the extent that the thermal welding is possible with the TPU-based sealing layer without damaging the sealing layer or the base layer during the thermal welding. For this purpose, it would come in the case of the usual sub-roof tape with a correspondingly thin sealing layer, so that the usual sub-roof tapes with the thermal welding can not be connected together. The same also applies to the source welding of the TPU-based sealant layers with a small thickness, which is not usable for the same reason.

This makes it possible to effectively interconnect the adjacent layers of sub-roof ribbons. The roof tape is further provided with an overlapped translation where the applied waterproof layer is selectively overpulled on one side or on both sides over the further layers. It thus provides a watertight connection in the places where the watertight sealing layers are currently connected. They also compress the entry into the middle support layer, which is permeable to water and permeable to water vapor. With the under-roof tape, it is also possible to form a sleeve and weld it directly to the basic sub-roof tape.

However, the overlapped translation need not be directly connected to the other sub-roof tape or wall tape or to another overlapped translation. It is used only for a free overlap of the connection and works as a water leg and prevents the penetration of water into the inner base layer, which is especially permeable to steam and permeable to water in the case of the small roof pitches.

Because the sub-roof tape or wall tape according to the invention is provided on both sides with the water-permeable and water-vapor-permeable sealing layer, which is welded directly to the sealing layer of another sub-roof tape, it is possible to waterproof connect a sub-roof tape with another sub-roof tape. Thus, a roof bow can be formed, which is completely waterproof and permeable to water vapor. The two-sided all-round sealing layer of the sub-roof tape and their overlapped translation allows a particularly effective connection between the adjacent sub-roof tapes. Here it is not necessary to apply to the adjacent sub-roof tapes an additional adhesive or another connection element.

The terms "impermeability to water" and "permeability to water vapor", if appropriate "openness to diffusion", are based on the guidelines of the construction supervision, which apply, for example, to the roofs in Germany. The corresponding standards lead, for example DIN 68800 and DIN 4108, part 3 and, in this context, it is necessary to use them for defining the above-mentioned characteristics.

In an advantageous embodiment, the material TPU is an aromatic TPU at least in a sealing layer. The aromatic TPUs are particularly well suited for welding and currently have particularly advantageous above-mentioned properties of the TPU-based sealing layer. Advantageously, the sealing layers always and mutually independently have a thickness of at least 0.07 mm, in an advantageous embodiment of 0.07 mm to 0.2 mm and in a particularly advantageous embodiment of 0.07 mm to 0.14 mm. Such a thickness of the sealing layer of the sub-roof tape is suitable for a mutual connection of the adjacent sub-roof tapes by means of welding, without causing damage to the sealing layers or the supporting layer. In addition, the required thickness is also suitable for effective production of the sub-roof tapes, because no excess material is applied to the base layer here.

These support layers advantageously always and mutually independently have an average basis weight of at least 70 g / m ² , in an advantageous embodiment of 70 g / m ² to 200 g / m ² and in a particularly advantageous embodiment of 70 g / m ² to 140 g / m ² on. The corresponding basis weights mean that, compared to the usual above-mentioned sealing layers according to the invention, the two adjacent sub-roof tapes can be connected to one another by means of thermal welding or swelling by means of welding. The average basis weight of the sub-roof tape is determined over the entire surface of the sub-roof tape.

The overlapped translation may have the same thickness and the same weight in the sealing layers as mentioned above, or they may be made higher. The width of the overlapped translation is chosen so that it fulfills the function of the drainage. In an advantageous embodiment, the width is selected in the range of 1 to 150 mm. As a base layer fleece is used in an advantageous embodiment. The nonwoven may use polyester fibers or mixtures of fibers containing polyester or its derivative. The base layer of fleece on the one hand enables a particularly simple production of the lower roof tape, in which case the sealing layers can be applied to the existing base layer without the actual sealing layers having to be particularly stable. This makes it possible to effectively form even large sub-roof ribbons. The support layer also serves to work safety in the laying of the sub-roof tape, because it increases their strength, so that the sub-roof tape can easily carry an adult human when he steps on it.

Upon request of the increased mechanical parameters of the sub-roof tape or wall tape, a stiffening grid or a reinforcing fabric is added to the vapor-permeable and water-permeable layer, which increases or prepares the mechanical parameters for achieving the required properties. This further layer is advantageously covered with the outer sealing layers which ensure the waterproofness of the sub-roof tape or the wall tape.

Thickness / weight of one or two watertight layers need not be equal over the entire width of the material and may change. This can be advantageously exploited for improving the possibility of connecting the under-roof tapes and also for optimizing the Sd value of the vapor permeability of the product.

The roof of the invention includes a plurality of the overlapped and welded watertight and water vapor permeable sub-roof tapes. In this case, the sealing layer of the first side of the sub-roof tape is welded to the sealing layer of the second opposite side so that the welding of the sub-roof tapes is waterproof and vapor-permeable and is further secured by means of the overlapped translation. Such a roof can be classified as waterproof according to the ZVDH guidelines, and therefore it is appropriate to contribute to an effective protection of the building, even in particularly unfavorable weather conditions.

Further, such a roof is preferred in which the sub-roof tape is welded to the adjacent sub-roof tape substantially over the entire overlapped area and secured by the overlapped translation. This also contributes to the durability and tightness of the roof.

The wall of the invention comprises a plurality of the overlapped and welded watertight and water vapor permeable bands. In this case, the sealing layer of the first side of the band with the sealing layer of the second opposite side is welded so that the welds of the bands are waterproof and vapor-permeable and further secured by means of the overlapped translation.

The invention will be explained in more detail with reference to the embodiments illustrated in the drawings. Show it:

1 in side view the cross section of the sub-roof tape for a sloping roof or the wall tape,

2A side view of the cross section of the sub-roof tape for a sloping roof or the wall tape with a stiffening layer,

2 B in side view, the cross section of the sub-roof tape for a sloping roof or the wall tape also with a stiffening layer and

3 in plan view two mutually connected sub-roof tapes or two mutually connected wall tapes.

1 shows a side view of the cross section of the sub-roof tape for a sloping roof or the wall tape 10 . 12 in an advantageous embodiment. On the upper side, namely on the first side of the base course 3 is a TPU based first sealant layer 1 , Also on the lower side, namely on the second side of the base layer 3 , is located on a TPU-based recycled second sealing layer 2 , Furthermore, here is an educated and freely overlapping the first sealing layer overlapping translation 5 shown.

2A shows in side view the cross section of the sub-roof tape for a sloping roof or the wall tape with a stiffening layer 4 ,

2 B shows in side view the cross section of the sub-roof tape for a sloping roof or the wall tape also with a different stiffening layer attached 4 , 2A and 2 B also show the overlapped translation 5 , as in 1 ,

3 shows in plan view the connection of the first sub-roof tape or wall tape 10 and the second sub-roof tape or wall tape 12 with a connection made 11 which ensures an arrangement of the watertight roof arch or an arrangement of the watertight wall tapes.

The waterproof and diffused connection of the two bands 10 and 12 and the prevention of water ingress into the base layer in the liquid state 3 allow classification of the tape in the category waterproof and vapor-permeable.

The base course 3 For example, it can be made of non-woven textiles - made of fleece.

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

LIST OF REFERENCE NUMBERS

1

First waterproof and vapor-permeable sealing layer

2

Second waterproof and vapor-permeable sealing layer

3

Water-permeable and vapor-permeable support layer

4

Additional stiffening layer

5

Overlapped seal translation

10

The first sub-roof tape or the first wall tape

11

Performed connections of the first and second bands

12

The second sub-roof tape or the second wall tape

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited non-patent literature

• DIN 1055 [0017]
• DIN 1928 [0020]
• DIN 20811 [0020]
• DIN 4108, Part 3 [0022]
• DIN 68800 [0023]
• DIN 68800 [0031]
• DIN 4108, Part 3 [0031]

Claims (11)

Protective hydro-insulating sub-roof tape for a sloping roof or wall tape with a water-permeable and water-vapor-permeable supporting layer ( 3 ) and with water impermeable and water vapor permeable sealing layers ( 1 . 2 ) on TPU basis and optionally with an additional stiffening layer, characterized in that the thickness of the sealing layers ( 1 . 2 ) is dimensioned so that the actual bands ( 10 . 12 ) waterproof and vapor-permeable by thermal welding or swelling by means of welding or by bonding in a compound ( 11 ) are connectable, wherein the support layer ( 3 ) on both sides and the entire surface with the first and second sealing layer ( 1 . 2 ) and the resulting connection ( 11 ) with an overlapped translation ( 5 ) is overlapped, further wherein the water ingress in the liquid state in the support layer ( 3 ) is prevented. Sub-roof tape or wall tape according to claim 1, characterized in that the TPU at least one sealing layer and advantageously the two sealing layers ( 1 . 2 ) is an aromatic TPU. Sub-roof tape or wall tape according to claim 1, characterized in that it on one side or on both sides of a water ingress in the liquid state in the support layer preventing overlapping translation ( 5 ) having. Sub-roof tape or wall tape according to claims 1 to 3, characterized in that its overlapped translation ( 5 ) in a width of 1 to 150 mm, the range being preferably 10 to 60 mm. Sub-roof tape or wall-mounted bath according to claims 1 to 4, characterized in that its overlapped translation ( 5 ) with another sub-roof tape or wall tape or the overlapped translation ( 5 ) is connected by means of thermal welding or swelling by means of welding or by gluing and this connection is waterproof and permeable to vapor. A sub-roof tape or wall tape according to any one of claims 1 to 5, characterized in that the sealing layers ( 1 . 2 ) always and mutually independently 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. A roof tape or wall tape according to any one of claims 1 to 6, characterized in that the sealing layers ( 1 . 2 ) always and mutually independently have an average basis weight of at least 70 g / m ² , 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 . Roof comprising a series of overlapped and welded watertight and water vapor permeable sub-roof tapes according to any one of claims 1 to 7, characterized in that the sealing layers ( 1 . 2 ) of the first sub-roof tape ( 10 ) with the sealing layers ( 1 . 2 ) of the second adjacent sub-roof tape ( 12 ) are welded so that the bands ( 10 . 12 ) welded connections ( 11 ), which are impermeable to water and permeable to water vapor, and these compounds ( 11 ) with an overlapped translation ( 5 ) are overlapped, which the water ingress in the liquid state in the support layer ( 3 ) or dissipate this water on the sloping roof. Roof according to claim 8, characterized in that the actual sub-roof tapes ( 10 . 12 ) with the adjacent sub-roof tapes ( 10 ) are welded substantially over the entire overlapped area. Wall comprising a series of overlapping and welded watertight and water vapor permeable wall tapes according to any one of claims 1 to 9, characterized in that the sealing layers ( 1 . 2 ) of the first wall tape ( 10 ) with the sealing layers ( 1 . 2 ) of the second adjacent wall tape ( 12 ) are welded so that the bands ( 10 . 12 ) welded connections ( 11 ), which are impermeable to water and permeable to water vapor, and these compounds ( 11 ) with an overlapped translation ( 5 ) are overlapped, which the water ingress in the liquid state in the support layer ( 3 ) or dissipates this water. Wall according to claim 10, characterized in that the actual wall bands ( 10 . 12 ) with the adjacent wall tapes ( 10 ) are welded substantially over the entire overlapped area.

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