EP0183266B1 - Under-roof membrane for sloping roofs - Google Patents

Under-roof membrane for sloping roofs Download PDF

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Publication number
EP0183266B1
EP0183266B1 EP85115103A EP85115103A EP0183266B1 EP 0183266 B1 EP0183266 B1 EP 0183266B1 EP 85115103 A EP85115103 A EP 85115103A EP 85115103 A EP85115103 A EP 85115103A EP 0183266 B1 EP0183266 B1 EP 0183266B1
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EP
European Patent Office
Prior art keywords
under
roof membrane
film
open
foam
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EP85115103A
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German (de)
French (fr)
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EP0183266A3 (en
EP0183266A2 (en
Inventor
Hermann Diehl
Günther Dr. Baatz
Walter Machholz
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Kloeber GmbH and Co
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Metzeler Schaum GmbH
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Priority to AT85115103T priority Critical patent/ATE52297T1/en
Publication of EP0183266A2 publication Critical patent/EP0183266A2/en
Publication of EP0183266A3 publication Critical patent/EP0183266A3/en
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Publication of EP0183266B1 publication Critical patent/EP0183266B1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D12/00—Non-structural supports for roofing materials, e.g. battens, boards
    • E04D12/002—Sheets of flexible material, e.g. roofing tile underlay

Definitions

  • the invention relates to a sarking membrane for pitched roofs, with a water vapor permeable, surface waterproof film and a layer of foam.
  • thermally insulated roofs moisture from the room air often penetrates into the thermal insulation made of foam or fiber material under certain weather conditions and, especially if this thermal insulation is covered with a foil for reasons of pollution or because surface water is drained from above, can lead to undesirable moisture penetration due to the temperature falling below the dew point cause a partial loss of thermal insulation properties. For this reason, it was previously necessary to always leave a ventilation space between the thermal insulation and an upper cover.
  • the present invention has for its object to provide a sarking membrane which has only a very low water vapor diffusion resistance, but which is nevertheless surface-water-tight and very flexible and adapts well to the unevenness of the roof or the thermal insulation layer underneath. Nevertheless, this underlay should have sufficient tensile strength and in particular should be so permeable to vapor that no additional ventilation space between the underlay and insulation material is required.
  • the film has a diffusion-equivalent air layer thickness of 0.07-0.12 m and is connected to a reinforcing layer made of an open-pore soft foam, and that a reinforcement made of a tear-resistant mesh fabric is arranged between the film and soft foam.
  • This diffusion-equivalent air layer thickness can be determined in accordance with DIN 52615 by determining the water vapor permeability and indicates an air layer thickness that has the same diffusion resistance as the corresponding material.
  • the film expediently has a thickness of 20-40 .mu.m, in particular 25-30 .mu.m and consists of polyurethane.
  • the film can also be provided with a reflective surface in order to reflect back radiation and thus further improve the insulation of the roof.
  • the mesh fabric expediently consists of polyester and has filaments with a diameter of 0.3-1 mm, in particular 0.5-0.8 mm, and a mesh size of 6-20 mm, in particular 8-12 mm.
  • the open-pore soft foam layer made of polyether polyurethane advantageously has a thickness of 2-12 mm, in particular 4-8 mm.
  • the film can be at least partially bonded to the foam in the area between the filaments of a mesh of the mesh fabric. It is particularly expedient if soft foam, grid fabric and foils are connected to one another by flame lamination.
  • the sarking membrane can then be arranged directly on the rafters and the intermediate rafter insulation and fastened by means of counter battens.
  • the underlay can be arranged directly on the insulation boards.
  • the underlay 1 practically consists of three layers, namely the soft foam layer 2, the mesh fabric 3 with the filaments 4 and the covering film 5.
  • the film 5 which expediently consists of polyurethane, has a thickness of 20-40 ⁇ m, in particular 25-30 ⁇ m.
  • the elongation at break is 550-600% and the tensile strength is 50-75 N / mm 2 .
  • the water vapor permeability - measured according to DIN 53122 - at 38 ° C and 90% relative humidity amounts to 350 g / m 2 d with a 30 pm thick polyether film or to 900 g / m 2 d with a corresponding polyether film.
  • the water pressure test according to DIN 53886 showed values of over 1500 mm WS (corresponding to 165 mbar).
  • the film can be equipped with fire-retardant additives.
  • the reinforcement 3 running below the film 5 consists of a mesh or -laid, which can be produced by knitting, weaving, interweaving, linking or coextrusion of crossing filaments 4 and which is equipped with fixed or loose crossing points.
  • the mesh size is 6-20 mm, especially 8-12 mm.
  • the individual filaments 4 have a thickness of 0.3-1 mm, in particular 0.5-0.8 mm, with warp or weft, but also from individual threads in the form of tapes with a width of 0.3-3 mm, in particular 0.5-1.5 mm can be formed.
  • Open-pore flexible polyether polyurethane foams with a bulk density of 25-45 kg / m 3 , in particular 30-35 kg / m 3 , and a thickness of 2-12 mm, in particular 4-8 mm, are advantageously used as the membrane 2 DIN 53571 have a tensile strength greater than 85 kPA.
  • the air permeability should be 100-300 l / min 100 cm 2 , in particular 160-200 l / min 100 cm 2 at 10 mm water column pressure and 50 mm sample thickness.
  • the three layers, namely the film 5, the mesh fabric 3 and the foam sheet 2, are expediently connected to one another by flame lamination.
  • the filaments 4 of the mesh fabric 3 are partially embedded in the foam web 2 and the foils 5 are glued over the entire surface to the foam and at least in sections to the filaments 4 of the mesh fabric 3.
  • This also increases the tensile strength of the underlay and makes warping due to folding or waves more difficult.
  • the diffusion of the water vapor is facilitated by the undisturbed transition area of the foils 5 between the mesh fabric 3 and the foam 2.
  • the three layers of the roofing membrane can be specially equipped to make the building material class B1 flame retardant or at least building material class 2 according to DIN 4102.
  • Fig. 2 an application example of the sarking membrane 1 on a pitched roof is now explained in more detail.
  • the space between the rafters 6 is filled with insulating material 7, for example made of mineral wool, at a woolly height.
  • insulating material 7 for example made of mineral wool
  • a lamination in the form of a metal foil 8 can also be applied as a vapor barrier.
  • a layer or a material whose diffusion-equivalent air layer thickness is only 2 m is also sufficient for this.
  • the roofing membrane 1 according to the invention is now applied to the top of the rafters 6 and directly to the insulating material 7. This sarking membrane 1 is expediently nailed onto the rafters 6 by means of counter battens 9.
  • the sarking membrane 1 is expediently laid in rows from the bottom to the top of the eaves, a corresponding overlap being appropriate depending on the inclination of the roof. Because of the low vapor retarding effect of the roofing membrane according to the invention, it can then be installed continuously over the ridge.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
  • Building Environments (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Body Structure For Vehicles (AREA)
  • Tents Or Canopies (AREA)

Description

Die Erfindung bezieht sich auf eine Unterspannbahn für geneigte Dächer, mit einer wasserdampfdurchlässigen, oberflächenwasserdichten Folie und einer Schicht aus Schaumstoff.The invention relates to a sarking membrane for pitched roofs, with a water vapor permeable, surface waterproof film and a layer of foam.

Bei wärmegedämmten Dächern dringt unter bestimmten Wetterbedingungen oftmals Feuchtigkeit der Raumluft in die Wärmedämmung aus Schaumstoff oder Fasermaterial ein und kann, insbesondere wenn diese Wärmedämmung aus Verschmutzungsgründen oder wegen der Ableitung von Oberflächenwasser von oben mit einer Folie abgedeckt ist, durch Taupunktunterschreitung zu unerwünschter Durchfeuchtung führen und damit einen teilweisen Verlust der wärmedämmenden Eigenschaften bedingen. Aus diesem Grunde war es bisher erforderlich zwischen der Wärmedämmung und einer oberen Abdekkung stets einen Belüftungsraum freizulassen.In thermally insulated roofs, moisture from the room air often penetrates into the thermal insulation made of foam or fiber material under certain weather conditions and, especially if this thermal insulation is covered with a foil for reasons of pollution or because surface water is drained from above, can lead to undesirable moisture penetration due to the temperature falling below the dew point cause a partial loss of thermal insulation properties. For this reason, it was previously necessary to always leave a ventilation space between the thermal insulation and an upper cover.

Aus der EP-A-0046944 ist eine solche Wärmedämmung eines Steildaches im Raum zwischen den Dachsparren bekannt, bei der eine als Unterspannbahn dienende Kaschierungsbahn nur eine geringe Wasserdampfdurchlässigkeit, d.h. eine hoben Wasserdampfdiffusionswiderstand aufweist.Such thermal insulation of a pitched roof in the space between the rafters is known from EP-A-0046944, in which a liner sheet serving as an underlay has only a low water vapor permeability, i.e. has a raised water vapor diffusion resistance.

Der vorliegenden Erfindung liegt demgegenüber die Aufgabe zugrunde, eine Unterspannbahn zu schaffen, die nur einen sehr geringen Wasserdampfdiffusionswiderstand aufweist, die aber dennoch oberflächenwasserdicht und sehr flexible ist und sich den Unebenheiten des Daches bzw. der darunterliegenden Wärmedämmschicht gut anpaßt. Trotzdem soll diese Unterspannbahn eine ausreichende Reißfestigkeit haben und inbesondere so dampfdurchlässig sein, daß kein zusätzlicher Belüftungsraum zwischen Unterspannbahn und Dämmstoff erforderlich ist.In contrast, the present invention has for its object to provide a sarking membrane which has only a very low water vapor diffusion resistance, but which is nevertheless surface-water-tight and very flexible and adapts well to the unevenness of the roof or the thermal insulation layer underneath. Nevertheless, this underlay should have sufficient tensile strength and in particular should be so permeable to vapor that no additional ventilation space between the underlay and insulation material is required.

Zur Lösung dieser Aufgabe ist erfindungsgemäß vorgesehen, daß die Folie eine diffusionsäquivalente Luftschichtdicke von 0,07-0,12 m aufweist und mit einer Verstärkungsschicht aus einem offenporigen Weichschaumsstoff verbunden ist, und daß zwischen Folie und Weichschaumstoff eine Armierung aus einem reißfesten Gittergewebe angeordnet ist.To achieve this object, it is provided according to the invention that the film has a diffusion-equivalent air layer thickness of 0.07-0.12 m and is connected to a reinforcing layer made of an open-pore soft foam, and that a reinforcement made of a tear-resistant mesh fabric is arranged between the film and soft foam.

Diese diffusionäquivalente Luftschichtdicke kann dabei nach DIN 52615 unter Bestimmung der Wasserdampfdurchlässigkeit ermittelt werden und gibt eine Luftschichtdicke an, die den selben Diffusionswiderstand aufweist wie das entsprechende Material.This diffusion-equivalent air layer thickness can be determined in accordance with DIN 52615 by determining the water vapor permeability and indicates an air layer thickness that has the same diffusion resistance as the corresponding material.

Durch die Einfügung einer derartigen Armierung ist es möglich, eine Dachbahn mit einer extrem dünnen Folie herzustellen, die sich trotz Regendichtheit durch hohe Wasserdampfdurchlässigkeit auszeichnet, Trotz günstiger Diffusionswerte ist die Unterspannbahn so fest, daß sie allen auf der Baustelle vorkommenden Beanspruchungen standhält. Durch den Schaumstoff wird darüberhinaus neben einer guten Anpassung an die baulich bedingten Unebenheiten des Daches eine zusätzliche Schalldämmung erzielt, was bei einer Auflage auf wärmedämmenden Kunststoffschaumplatten aus Styropor, Polyurethan oder ähnlichem besonders vorteilhaft ist.By inserting such reinforcement, it is possible to produce a roofing membrane with an extremely thin film, which is characterized by high water vapor permeability despite rainproofness. Despite favorable diffusion values, the roofing membrane is so firm that it can withstand all stresses occurring on the construction site. Through the foam, in addition to a good adaptation to the structural unevenness of the roof, additional sound insulation is achieved, which is particularly advantageous when placed on thermally insulating plastic foam panels made of polystyrene, polyurethane or the like.

Zweckmäßigerweise weist die Folie eine Dicke von 20-40 um, insbesondere 25-30 11m auf und besteht aus Polyurethan. Dabei kann die Folie auch mit einer reflektierenden Oberfläche versehen sein, um Einstrahlungen zurückzuwerfen und damit die Dämmung des Daches noch weiter zu verbessern.The film expediently has a thickness of 20-40 .mu.m, in particular 25-30 .mu.m and consists of polyurethane. The film can also be provided with a reflective surface in order to reflect back radiation and thus further improve the insulation of the roof.

Das Gittergewebe besteht zweckmäßigerweise aus Polyester und weist Filamente mit einem Durchmesser von 0,3-1 mm, insbesondere 0,5-0,8 mm, sowie eine Maschenweite von 6-20 mm, insbesondere 8-12 mm, auf.The mesh fabric expediently consists of polyester and has filaments with a diameter of 0.3-1 mm, in particular 0.5-0.8 mm, and a mesh size of 6-20 mm, in particular 8-12 mm.

Vorteilhafterweise weiste die offenporige Weichschaumshicht aus Polyäther-Polyurethan eine Dicke von 2-12 mm, insbesondere 4-8 mm, auf.The open-pore soft foam layer made of polyether polyurethane advantageously has a thickness of 2-12 mm, in particular 4-8 mm.

Um eine gute Gesamtfestigkeit zu erhalten, kann die Folie im Bereich zwischen den Filamenten einer Masche des Gittergewebes mit dem Schaumstoff zumindest teilweise verbunden sein. Besonders zweckmäßig ist es, wenn Weichschaumstoff, Gittergewebe und Folien durch Flammkaschieren miteinander verbunden sind.In order to obtain good overall strength, the film can be at least partially bonded to the foam in the area between the filaments of a mesh of the mesh fabric. It is particularly expedient if soft foam, grid fabric and foils are connected to one another by flame lamination.

Die Unterspannbahn kann dann unmittelbar auf den Dachsparren und der Zwischensparrendämmung angeordnet und durch Konterlattung befestigt sein.The sarking membrane can then be arranged directly on the rafters and the intermediate rafter insulation and fastened by means of counter battens.

Bei einem sparrenoberseitigen Dämmsystem aus starren Dämmplatten kann die Unterspannbahn unmittelbar auf den Dämmplatten angeordnet werden.In the case of an insulation system made of rigid insulation boards on top of the rafters, the underlay can be arranged directly on the insulation boards.

Anhand einer schematischen Zeichnung sind Aufbau und Funktionsweise von Ausführungsbeispielen nach der Erfindung näher erläutert. Dabei zeigen

  • Fig. 1 die perspektivische Ansicht eines Abschnittes der Unterspannbahn in vergrößertem Maßstad und
  • Fig. 2 eine perspektivische Ansicht, teilweise geschnitten, der Anordnung der Unterspannbahn auf einem Steildach.
The structure and mode of operation of exemplary embodiments according to the invention are explained in more detail using a schematic drawing. Show
  • Fig. 1 is a perspective view of a portion of the roofing membrane in an enlarged measure and
  • Fig. 2 is a perspective view, partly in section, of the arrangement of the sarking membrane on a pitched roof.

Wie aus Fig. 1 zu ersehen ist, besteht die Unterspannbahn 1 praktisch aus drei Schichten, nämlich der Weichschaumschicht 2, dem Gittergewebe 3 mit den Filamenten 4 sowie der abdekkenden Folie 5.As can be seen from FIG. 1, the underlay 1 practically consists of three layers, namely the soft foam layer 2, the mesh fabric 3 with the filaments 4 and the covering film 5.

Die Folie 5, die zweckmäßigerweise aus Polyurethan besteht, hat eine Dicke von 20-40 um, insbesondere von 25-30 pm. Nach DIN 53455 beträgt die Reißdehnung 550-600% und die Reißfestigkeit 50-75 N/mm2. Die Wasserdampfdurchlässigkeit-gemessen nach DIN 53122-bei 38°C und 90% relativer Luftfeuchtigkeit beläuft sich bei einer 30 pm starken Polyätherfolie auf 350 g/m2d bzw. bei einer entsprechenden Polyätherfolie auf 900 g/m2d. Gegen Oberflächenwasser ergab die Wasserdruckprüfung nach DIN 53886 Werte von über 1500 mm WS (entsprechend 165 mbar). Ferner kann die Folie mit brandhemmenden Zusatzstoffen ausgerüstet sein.The film 5, which expediently consists of polyurethane, has a thickness of 20-40 μm, in particular 25-30 μm. According to DIN 53455, the elongation at break is 550-600% and the tensile strength is 50-75 N / mm 2 . The water vapor permeability - measured according to DIN 53122 - at 38 ° C and 90% relative humidity amounts to 350 g / m 2 d with a 30 pm thick polyether film or to 900 g / m 2 d with a corresponding polyether film. Against surface water, the water pressure test according to DIN 53886 showed values of over 1500 mm WS (corresponding to 165 mbar). Furthermore, the film can be equipped with fire-retardant additives.

Die unterhalb der Folie 5 verlaufende Armierung 3 besteht aus einem Gittergewebe oder -gelege, das durch Wirken, Weben, Verflechten, Verknüpfen oder Koextrusion sich kreuzender Filamente 4 hergestellt werden kann und das mit festen oder losen Kreuzungspunkten ausgerüster ist. Die Maschenweite beträgt 6-20 mm, insbesondere 8-12 mm. Die einzelnen Filamente 4 haben dabei eine Dicke von 0,3-1 mm, insbesondere 0,5-0,8 mm, wobei Kette oder Schuß, aber auch aus einzeln liegenden Fäden in Form von Bändchen mit einer Breite von 0,3-3 mm, insbesondere 0,5-1,5 mm ausgebildet sein können.The reinforcement 3 running below the film 5 consists of a mesh or -laid, which can be produced by knitting, weaving, interweaving, linking or coextrusion of crossing filaments 4 and which is equipped with fixed or loose crossing points. The mesh size is 6-20 mm, especially 8-12 mm. The individual filaments 4 have a thickness of 0.3-1 mm, in particular 0.5-0.8 mm, with warp or weft, but also from individual threads in the form of tapes with a width of 0.3-3 mm, in particular 0.5-1.5 mm can be formed.

Als Schamstoffbahn 2 werden vorteilhafterweise offenporige Polyäther-Polyurethan-Weichschaumstoffe mit 25--45 kg/m3, insbesondere 30-35 kg/m3 Rohdichte, und einer Dicke von 2-12 mm, insbesondere 4-8 mm, verwendet, die nach DIN 53571 eine Zugfestigkeit größer als 85 kPA besitzen. Die Luftdurchlässigkeit sollte 100-300 I/min 100 cm2, insbesondere 160-200 I/ min 100 cm2 bei 10 mm Wassersäulendruck und 50 mm Probendicke betragen.Open-pore flexible polyether polyurethane foams with a bulk density of 25-45 kg / m 3 , in particular 30-35 kg / m 3 , and a thickness of 2-12 mm, in particular 4-8 mm, are advantageously used as the membrane 2 DIN 53571 have a tensile strength greater than 85 kPA. The air permeability should be 100-300 l / min 100 cm 2 , in particular 160-200 l / min 100 cm 2 at 10 mm water column pressure and 50 mm sample thickness.

Die drei Schichten, nämlich die Folie 5, das Gittergewebe 3 und die Schaumstoffbahn 2, werden zweckmäßigerweise durch Flammkaschieren miteinander verbunden. Dadurch werden die Filamente 4 des Gittergewebes 3 teilweise in die Schaumstoffbahn 2 eingebettet und die Folien 5 vollflächig mit dem Schaumstoff und zumindest abschnittsweise mit den Filamenten 4 des Gittergewebes 3 verklebt. Damit wird auch die Reißfestigkeit der Unterspannbahn erhöht und ein Verzug durch Falten oder Wellen erschwert. Gleichzeitig wird die Diffusion des Wasserdampfes durch den ungestörten Übergangsbereich der Folien 5 zwischen Gittergewebe 3 und Schaumstoff 2 erleichtert.The three layers, namely the film 5, the mesh fabric 3 and the foam sheet 2, are expediently connected to one another by flame lamination. As a result, the filaments 4 of the mesh fabric 3 are partially embedded in the foam web 2 and the foils 5 are glued over the entire surface to the foam and at least in sections to the filaments 4 of the mesh fabric 3. This also increases the tensile strength of the underlay and makes warping due to folding or waves more difficult. At the same time, the diffusion of the water vapor is facilitated by the undisturbed transition area of the foils 5 between the mesh fabric 3 and the foam 2.

Eine zusätzliche Erhöhung der Festigkeit ist dadurch möglich, daß die Folie 5 gereckt ist. Dies hat auch den Vorteil, daß bei Auftreten eines Feuers die Folie wegschrumpft und dadurch ein Weiterbrennen erschwert.An additional increase in strength is possible in that the film 5 is stretched. This also has the advantage that when a fire occurs, the film shrinks away, making it difficult to continue burning.

In gleicher Weise ist es auch möglich, die Filamente 4 des Gittergewebes oder -geleges 3 durch Recken in ihrer Festigkeit zu erhöhen.In the same way, it is also possible to increase the strength of the filaments 4 of the grid fabric or scrim 3 by stretching.

Insgesamt kann durch eine spezielle Ausrüstung der drei Schichten der Unterspannbahn eine Schwerentflammbarkeit der Baustoffklasse B1 oder zumindest eine Baustoffklasse 2 nach DIN 4102 erreicht werden.Overall, the three layers of the roofing membrane can be specially equipped to make the building material class B1 flame retardant or at least building material class 2 according to DIN 4102.

In Fig. 2 ist nunmehr ein Anwendungsbeispiel der Unterspannbahn 1 auf einem Steildach näher erläutert. Dabei ist zunächst der Zwischenraum zwischen den Dachsparren 6 in woller Höhe mit Dämmstoff 7, beispielsweise aus einer Mineralwolle, ausgefüllt. Unterseitig kann dabei noch eine Kaschierung in Form einer Metallfolie 8 als Dampfsparre aufgebracht sein. Hierfür ist abere auch eine Schicht bzw. ein Material ausreichend, dessen diffusionsäquivalente Luftschichtdicke lediglich 2 m beträgt. Oberseitig ist nunmehr auf die Dachsparren 6 und unmittelbar auf den Dämmstoff 7 die erfindungsgemäße Unterspannbahn 1 aufgebracht. Diese Unterspannbahn 1 wird zweckmäßigerweise über eine Konterlattung 9 auf die Dachsparren 6 aufgenagelt. Es ist aber auch möglich, die Unterspannbahn 1 zunächst ohne Lattung 9 unmittelbar auf die Dachsparren 6 aufzunageln. Wegen des relativ engmaschigen Gittergewebes 3 werden dabei durch die im Dachhandwerk üblichen Klammern immer einzelne Filamente erfaßt, so daß sich eine schnelle und sicherre Anbringung auch bei ungünstigen Wetterverhältnissen, wie beispielsweise einem stärkeren Wind, ohne weiteres möglich ist. Auf die Konterlattung 9 wird dann die eigentliche Lattung 10 aufgebracht, auf der die einzelnen Dachziegel 11 festgelegt werden.In Fig. 2 an application example of the sarking membrane 1 on a pitched roof is now explained in more detail. First, the space between the rafters 6 is filled with insulating material 7, for example made of mineral wool, at a woolly height. On the underside, a lamination in the form of a metal foil 8 can also be applied as a vapor barrier. However, a layer or a material whose diffusion-equivalent air layer thickness is only 2 m is also sufficient for this. The roofing membrane 1 according to the invention is now applied to the top of the rafters 6 and directly to the insulating material 7. This sarking membrane 1 is expediently nailed onto the rafters 6 by means of counter battens 9. But it is also possible to nail the roofing membrane 1 directly onto the rafters 6 without battens 9. Because of the relatively close-meshed lattice fabric 3, individual filaments are always detected by the clamps customary in roofing, so that a quick and safe attachment is possible without any problems even in unfavorable weather conditions, such as a stronger wind. The actual battens 10 are then applied to the counter battens 9, on which the individual roof tiles 11 are fixed.

Die Unterspannbahn 1 wird dabei zweckmäßigerweise reihenweise von unten nach oben traufparallel verlegt, wobei je nach Neigung des Daches eine entsprechende Überlappung zweckmäßig ist. Wegen der geringen Dampfbremswirkung der erfindungsgemäßen Unterspannbahn kann diese dann durchgehend über den First hinweg eingebaut werden.The sarking membrane 1 is expediently laid in rows from the bottom to the top of the eaves, a corresponding overlap being appropriate depending on the inclination of the roof. Because of the low vapor retarding effect of the roofing membrane according to the invention, it can then be installed continuously over the ridge.

Claims (11)

1. An under-roof membrane for sloping roofs comprising a film which is permeable to water vapour but impervious to surface water and a layer made of foam, characterised in that the film (5) has a diffusion-equivalent air space thickness of 0.07-0.12 m and is connected to a strengthening layer (2) made of an open-pored soft foam and that a reinforcement made of a tear-resistant, open-weave fabric (3) is arranged between the film (5) and the soft foam (2).
2. An under-roof membrane as claimed in claim 1, characterised in that the film has a thickness of 20-40 pm, in particular 25-30 pm.
3. An under-roof membrane as claimed in claim 1, characterised in that film (5) comprises polyurethane.
4. An under-roof membrane as claimed in one of the claims 1 to 3, characterised in that the film (5) is provided with a reflective surface.
5. An under-roof membrane as claimed in claim 1, characterised in that the open-weave fabric (3) is made of polyester.
6. An under-roof membrane as claimed in claim 5, characterised in that the open-weave fabric (3) is produced from filaments (4) having a diameter of 0.3-1.0 mm, in particular 0.5-0.8 mm, and possesses a mesh width of 6-20 mm, in particular 8-12 mm.
7. An under-roof membrane as claimed in claim 1, characterised in that the open-pored soft foam layer (2) made of polyether-polyurethane has a thickness of 2-12 mm, in particular 4-8 mm.
8. An under-roof membrane as claimed in one or several of the claims 1 to 7, charcterised in that in the region between the filaments (4) of a mesh of the open-weave fabric (3) the film (5) is at least partially connected to the foam (2).
9. An under-roof membrane as claimed in claims 1 to 8, characterised in that the soft foam (2), open-weave fabric (3) and film (5) are connected to one another by flame lining.
10. An under-roof membrane as claimed in claims 1 to 9, characterised in that it is arranged directly on the rafters (6) and the inter-rafter insulation (7) and is attached by cross-battening (9).
11. An under-roof membrane as claimed in claims 1 to 9, characterised in that in the case of insulating systems made of rigid insulating plates which are arranged on the upper side of the rafters, it is arranged directly on the insulating plates.
EP85115103A 1984-11-29 1985-11-28 Under-roof membrane for sloping roofs Expired - Lifetime EP0183266B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85115103T ATE52297T1 (en) 1984-11-29 1985-11-28 SUB-TUBE FOR INCLINED ROOFING.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3443581 1984-11-29
DE3443581 1984-11-29
DE19853538597 DE3538597A1 (en) 1984-11-29 1985-10-30 UNDERCOVERING FOR TILTED ROOFS
DE3538597 1985-10-30

Publications (3)

Publication Number Publication Date
EP0183266A2 EP0183266A2 (en) 1986-06-04
EP0183266A3 EP0183266A3 (en) 1987-06-03
EP0183266B1 true EP0183266B1 (en) 1990-04-25

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Family Applications (1)

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EP85115103A Expired - Lifetime EP0183266B1 (en) 1984-11-29 1985-11-28 Under-roof membrane for sloping roofs

Country Status (6)

Country Link
US (1) US4630421A (en)
EP (1) EP0183266B1 (en)
JP (1) JP2514610B2 (en)
DE (2) DE3538597A1 (en)
DK (1) DK159073C (en)
ES (1) ES290598Y (en)

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DE3905142A1 (en) * 1989-02-20 1990-08-23 Gehring Manfred Sealing strip for ridge and hip coverings
GB9210229D0 (en) † 1992-05-13 1992-07-01 Don & Low Holdings Ltd Improvements in and relating to liquid impermeable and liquid vapour permeable laminates
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US7008890B1 (en) * 1995-04-19 2006-03-07 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Vapor barrier for use in the thermal insulation of buildings
AU5895396A (en) * 1995-05-22 1996-12-11 Akzo Nobel N.V. Air barrier and use thereof in roofs
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Also Published As

Publication number Publication date
ES290598U (en) 1986-04-16
US4630421A (en) 1986-12-23
DE3538597C2 (en) 1989-09-21
DK159073B (en) 1990-08-27
JP2514610B2 (en) 1996-07-10
EP0183266A3 (en) 1987-06-03
JPS61137952A (en) 1986-06-25
EP0183266A2 (en) 1986-06-04
DE3538597A1 (en) 1986-05-28
ES290598Y (en) 1986-12-01
DK545185A (en) 1986-05-30
DE3577336D1 (en) 1990-05-31
DK159073C (en) 1991-01-28
DK545185D0 (en) 1985-11-26

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