EP0414143A1 - Roof covering membrane - Google Patents

Roof covering membrane Download PDF

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Publication number
EP0414143A1
EP0414143A1 EP90115782A EP90115782A EP0414143A1 EP 0414143 A1 EP0414143 A1 EP 0414143A1 EP 90115782 A EP90115782 A EP 90115782A EP 90115782 A EP90115782 A EP 90115782A EP 0414143 A1 EP0414143 A1 EP 0414143A1
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EP
European Patent Office
Prior art keywords
layer
roof covering
layers
covering sheet
weldable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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EP90115782A
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German (de)
French (fr)
Inventor
Klaus Göbel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alwitra KG Klaus Gobel
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Alwitra KG Klaus Gobel
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alwitra KG Klaus Gobel filed Critical Alwitra KG Klaus Gobel
Publication of EP0414143A1 publication Critical patent/EP0414143A1/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/12—Roof covering by making use of flexible material, e.g. supplied in roll form specially modified, e.g. perforated, with granulated surface, with attached pads

Definitions

  • the invention relates to a two-layer, sealing roof covering sheet according to the preamble of claim 1.
  • Such a roof covering sheet is known, for example, from the document EP-A-0 240 596 in the form that the upper layer as a sealing sheet consists of a thermoplastic material such as high-density polyethylene and the lower layer consists of a nonwoven fabric laminated thereon, which homogenizes the Cause stretching behavior and should allow the webs to be glued to the substrate.
  • the upper layers of adjacent webs should be hot air or hot wedge welded together with the integration of the fleece.
  • DE-GM 81 09 869 shows a two-layer sealing roof covering sheet, in which the two layers have the same width and are laterally offset from one another, so as to bring the two layers overlapping on top of one another when connected to corresponding adjacent sheets.
  • the upper layer preferably consists of a bitumen roofing membrane, for example a glass fiber nonwoven or fabric sheet coated with bitumen, while the lower layer is formed as a vapor relaxation layer by a nonwoven or fabric or also an open-pore flexible plastic foam.
  • the membrane in question is to be used as the first sealing layer of a multi-layer roof waterproofing.
  • DE-GM 77 35 970 specifies a two-ply end membrane for a sealing roof covering, in which the upper ply consists of rubber and the lower ply consists of a fiber-reinforced thermoplastic fabric or fleece.
  • the top layer jumps to one side back so as to allow the lower layers of adjacent sheets to lie directly on top of one another for the purpose of welding.
  • a multi-layer roof covering for greening flat roofs which has a protective layer, drainage and filter layer, for example 20 mm thick layer outside and separate from a waterproof roof skin.
  • the layer in question is to become an air layer which enables vapor diffusion upwards.
  • Such a roof covering is naturally only time-consuming and correspondingly expensive to apply.
  • there is a risk that the roots of the green roof will grow through the multifunctional layer mentioned and the underlying, i.a. relatively sensitive roof skin, especially where this usually sheet-like roof skin has its abutting points and the roots consequently find resistance to lateral evasion.
  • the invention is therefore based on the object of creating an integral sealing roof covering sheet for use under green roofs which, in addition to excellent sealing properties, also has a high resistance to boring root system.
  • the sealing function is distributed over the two layers, while the lower layer also has a compensating function and the upper layer has a shielding and thus protective function.
  • the upper layer which is only slightly bulky at the points of overlap with neighboring webs, offers hardly any possibility of attack to a laterally expanding root system.
  • it allows the lateral offset tion of the two layers of the same width, to connect them each with the same layers of adjacent sheets by welding or gluing and accordingly firmly and reliably.
  • Each of the two adjoining webs 2 according to the invention shown has a lower layer 4 of e.g. 1.2 mm thick, for example made of EVA-PVC and an upper layer 6 of e.g. 0.25 mm, for example from PVC. While the layer 4 serves to compensate for smaller unevenness in addition to the seal, the upper layer 6 primarily forms a protective layer for the lower layer 4.
  • the two layers 4 and 6 of each track 2 are of equal width, but are laterally offset from one another by, for example, 40 mm, so that there are alternate projections of the two layers on both sides, as can be seen from the two tracks 2 in the figure .
  • This makes it possible for the same layers of both webs to be brought into direct and surface contact with one another at the junction and welded or glued. This allows a firm and absolutely tight connection to be achieved.
  • the connection of the two lower layers 4 and also that of the two upper layers 6 takes place by welding, e.g. Hot air welding and / or welding using a solvent.
  • the upper layer 6 Since the upper layer 6 is relatively thin, it can only apply a little at its edge. Where the top layer 6 of the web overlapping on the top (left in the drawing) over the If the thicker lower layer 4 protrudes, it will, at 8, form a gentle bend, which in turn means that there is hardly any possibility of lateral attack for roots that expand laterally.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)

Abstract

In a two-layer sealing roof covering membrane (2) for roofs to be grassed, the bottom layer (4) consists of a weldable and/or bondable, hermetically sealing plastics material and the top layer (6) consists of a watertight weldable and/or bondable plastics material of relatively high strength. Both layers (4, 6) are, having the same width, laterally offset relative to one another so as to permit a direct surface join with in each case identical layers (4, 6) of a corresponding adjacent membrane (2). <IMAGE>

Description

Die Erfindung bezieht sich auf eine zweilagige, abdichtende Dachabdeckungsbahn gemäß Gattungsbegriff des Anspruchs 1.The invention relates to a two-layer, sealing roof covering sheet according to the preamble of claim 1.

Eine derartige Dachabdeckungsbahn ist beispielsweise aus der Schrift EP-A-0 240 596 in der Form bekannt, daß die obere Lage als Abdichtungsbahn aus einem thermoplastischen Kunststoff wie etwa Polyethylen hoher Dichte und die untere Lage aus einem darauf aufkaschierten Faservlies besteht, das eine Vergleich­mäßigung des Dehnungsverhaltens herbeiführen und eine Verkle­bung der Bahnen mit dem Untergrund ermöglichen soll. Dabei sollen die oberen Lagen benachbarter Bahnen unter Einbindung des Vlieses miteinander heißluft- oder heizkeilverschweißbar sein.Such a roof covering sheet is known, for example, from the document EP-A-0 240 596 in the form that the upper layer as a sealing sheet consists of a thermoplastic material such as high-density polyethylene and the lower layer consists of a nonwoven fabric laminated thereon, which homogenizes the Cause stretching behavior and should allow the webs to be glued to the substrate. The upper layers of adjacent webs should be hot air or hot wedge welded together with the integration of the fleece.

Das DE-GM 81 09 869 zeigt eine zweilagige abdichtende Dachab­deckungsbahn, bei der die beiden Lagen die gleiche Breite auf­weisen und gegeneinander seitlich versetzt sind, um so bei der Verbindung mit entsprechenden benachbarten Bahnen beide Lagen überlappend aufeinander zur Auflage zu bringen. Dabei besteht die obere Lage vorzugsweise aus einer Bitumen-Dachbahn, bei­spielsweise einer mit Bitumen beschichteten Glasfaservlies­oder -gewebebahn, während die untere Lage als Dampfentspan­nungsschicht von einem Vlies oder Gewebe oder auch einem offen­porigen flexiblen Kunststoffschaum gebildet wird. Die betref­fende Bahn soll als erste Dichtungslage einer mehrlagigen Dachabdichtung Anwendung finden.DE-GM 81 09 869 shows a two-layer sealing roof covering sheet, in which the two layers have the same width and are laterally offset from one another, so as to bring the two layers overlapping on top of one another when connected to corresponding adjacent sheets. The upper layer preferably consists of a bitumen roofing membrane, for example a glass fiber nonwoven or fabric sheet coated with bitumen, while the lower layer is formed as a vapor relaxation layer by a nonwoven or fabric or also an open-pore flexible plastic foam. The membrane in question is to be used as the first sealing layer of a multi-layer roof waterproofing.

Das DE-GM 77 35 970 gibt eine zweilagige Abschlußbahn für einen abdichtenden Dachbelag an, bei der die obere Lage aus Kautschuk und die untere aus einem faserverstärkten Thermoplastgewebe oder -vlies besteht. Die obere Lage springt auf einer Seite zu­ rück, um so ein unmittelbares Aufeinanderliegen der unteren La­gen benachbarter Bahnen zwecks Verschweißung zu ermöglichen.DE-GM 77 35 970 specifies a two-ply end membrane for a sealing roof covering, in which the upper ply consists of rubber and the lower ply consists of a fiber-reinforced thermoplastic fabric or fleece. The top layer jumps to one side back so as to allow the lower layers of adjacent sheets to lie directly on top of one another for the purpose of welding.

Schließlich ist aus dem DE-GM 33 28 110 eine vielschichtige Dachbedeckung zum Begrünen von Flachdächern bekannt, die eine zugleich als Schutzschicht, Dränage und Filterschicht dienende, beispielsweise 20 mm starke Schicht außerhalb und separat von einer wasserundurchlässigen Dachhaut aufweist. Die betreffende Schicht soll infolge hohen Abflußwertes zu einer eine Dampfdif­fusion nach oben hin ermöglichenden Luftschicht werden. Eine derartige Dachabdeckung ist naturgemäß nur zeitraubend und ent­sprechend kostspielig aufzubringen. Zudem besteht die Gefahr, daß Wurzeln der Dachbegrünung durch die erwähnte mehrfunktio­nale Schicht hindurchwachsen und die darunterliegende, i.a. verhältnismäßig empfindliche Dachhaut verletzten, insbesondere wo diese gewöhnlich bahnförmig verlegte Dachhaut ihre Stoßstel­len hat und die Wurzeln demzufolge einen Widerstand gegen seit­liches Ausweichen finden.Finally, from DE-GM 33 28 110 a multi-layer roof covering for greening flat roofs is known, which has a protective layer, drainage and filter layer, for example 20 mm thick layer outside and separate from a waterproof roof skin. As a result of the high discharge value, the layer in question is to become an air layer which enables vapor diffusion upwards. Such a roof covering is naturally only time-consuming and correspondingly expensive to apply. In addition, there is a risk that the roots of the green roof will grow through the multifunctional layer mentioned and the underlying, i.a. relatively sensitive roof skin, especially where this usually sheet-like roof skin has its abutting points and the roots consequently find resistance to lateral evasion.

Der Erfindung liegt von daher die Aufgabe zugrunde, eine inte­grale abdichtende Dachabdeckungsbahn zur Verwendung unter Dach­begrünungen zu schaffen, die neben ausgezeichneten Abdichtungs­eigenschaften auch eine hohe Widerstandsfähigkeit gegen bohren­des Wurzelwerk aufweist.The invention is therefore based on the object of creating an integral sealing roof covering sheet for use under green roofs which, in addition to excellent sealing properties, also has a high resistance to boring root system.

Diese Aufgabe ist erfindungsgemäß durch die Merkmale des An­spruchs 1 gelöst. Die Unteransprüche geben vorteilhafte Ausge­staltungsmöglichkeiten an.This object is achieved by the features of claim 1. The subclaims indicate advantageous design options.

Durch die betreffende Ausbildung ist die Abdichtungsfunktion auf die beiden Lagen verteilt, während die untere Lage zusätz­lich eine Ausgleichs- und die obere Lage eine Abschirm- und da­mit Schutzfunktion ausübt. Die an den Überlappungsstellen mit benachbarten Bahnen nur wenig auftragende obere Lage bietet einem seitwärts sich ausdehnenden Wurzelwerk kaum eine An­griffsmöglichkeit. Dazu noch erlaubt es die seitliche Verset­ zung der beiden gleich breiten Lagen, diese jeweils mit glei­chen Lagen benachbarter Bahnen flächenhaft durch Verschweißung oder Verklebung und dementsprechend fest und zuverlässig zu verbinden.As a result of the training in question, the sealing function is distributed over the two layers, while the lower layer also has a compensating function and the upper layer has a shielding and thus protective function. The upper layer, which is only slightly bulky at the points of overlap with neighboring webs, offers hardly any possibility of attack to a laterally expanding root system. In addition, it allows the lateral offset tion of the two layers of the same width, to connect them each with the same layers of adjacent sheets by welding or gluing and accordingly firmly and reliably.

Nachfolgend wird ein bevorzugtes Ausführungsbeispiel der Erfin­dung anhand der begleitenden Zeichnung genauer beschrieben. Die einzige Figur der Zeichnung zeigt einen (nicht maßstäblichen) Querschnitt durch die Verbindungsstelle zweier gleicher Dachab­deckungsbahnen nach der Erfindung.A preferred exemplary embodiment of the invention is described in more detail below with reference to the accompanying drawing. The only figure of the drawing shows a (not to scale) cross section through the junction of two identical roof covering sheets according to the invention.

Eine jede der beiden gezeigten aneinanderschließenden Bahnen 2 nach der Erfindung weist eine untere Lage 4 von z.B. 1,2 mm Stärke beispielsweise aus EVA-PVC sowie eine darauf aufka­schierte obere Lage 6 von z.B. 0,25 mm beispielsweise aus PVC auf. Während die unter Lage 4 neben der Abdichtung dem Aus­gleich kleinerer Unebenheiten dient, bildet die obere Lage 6 in erster Linie eine Schutzschicht für die untere Lage 4.Each of the two adjoining webs 2 according to the invention shown has a lower layer 4 of e.g. 1.2 mm thick, for example made of EVA-PVC and an upper layer 6 of e.g. 0.25 mm, for example from PVC. While the layer 4 serves to compensate for smaller unevenness in addition to the seal, the upper layer 6 primarily forms a protective layer for the lower layer 4.

Die beiden Lagen 4 und 6 einer jeden Bahn 2 sind gleich breit, jedoch um beispielsweise 40 mm seitlich gegeneinander versetzt aufeinander aufgebracht, so daß sich abwechselnde überstände der beiden Lagen auf beiden Seiten ergeben, wie dies an den beiden Bahnen 2 in der Figur erkennbar ist. Dies wiederum er­möglicht es, daß jeweils gleiche Lagen beider Bahnen an der Verbindungsstelle unmittelbar und flächenhaft aufeinander zur Auflage gebracht und verschweißt oder verklebt werden können. Damit läßt sich eine feste und absolut dichte Verbindung erzie­len. Vorzugsweise erfolgt die Verbindung der beiden unteren La­gen 4 und ebenso diejenige der beiden oberen Lagen 6 durch Verschweißung, wie z.B. Heißluftverschweißung und/oder Verschweißung mit Hilfe eines Lösungsmittels.The two layers 4 and 6 of each track 2 are of equal width, but are laterally offset from one another by, for example, 40 mm, so that there are alternate projections of the two layers on both sides, as can be seen from the two tracks 2 in the figure . This, in turn, makes it possible for the same layers of both webs to be brought into direct and surface contact with one another at the junction and welded or glued. This allows a firm and absolutely tight connection to be achieved. Preferably, the connection of the two lower layers 4 and also that of the two upper layers 6 takes place by welding, e.g. Hot air welding and / or welding using a solvent.

Da die obere Lage 6 verhältnismäßig dünn ist, vermag sie an ihrem Rand nur wenig aufzutragen. Da wo die obere Lage 6 der oberseitig überlappenden Bahn (in der Zeichnung links) über die dickere untere Lage 4 übersteht, wird sie, bei 8, eine sanfte Abkröpfung bilden, wodurch wiederum kaum eine seitliche An­griffsmöglichkeit für sich seitlich ausdehnende Wurzeln be­steht.Since the upper layer 6 is relatively thin, it can only apply a little at its edge. Where the top layer 6 of the web overlapping on the top (left in the drawing) over the If the thicker lower layer 4 protrudes, it will, at 8, form a gentle bend, which in turn means that there is hardly any possibility of lateral attack for roots that expand laterally.

Claims (6)

1. Zweilagige, abdichtende Bahn für Dachabdeckungen, bei der die im Gebrauch obenliegende Lage (6) aus einem wasserdichten verschweißbaren und/oder verklebbaren Kunststoffmaterial be­steht und entlang eines Randes über die untere Lage (4) über­steht, dadurch gekennzeichnet, daß die untere Lage (4) aus einem gleichfalls verschweißbaren und/oder verklebbaren und zu­dem hermetisch abdichtenden Kunststoffmaterial besteht, daß das Material der oberen Lage (4) ein solches hoher Festigkeit ist und daß beide Lagen (4, 6), die gleiche Breite aufweisend, ge­geneinander seitenversetzt sind.1. Two-layer, sealing membrane for roofing, in which the top layer (6) in use consists of a waterproof weldable and / or gluable plastic material and protrudes along an edge over the bottom layer (4), characterized in that the bottom layer ( 4) consists of an equally weldable and / or gluable and also hermetically sealing plastic material that the material of the upper layer (4) is such a high strength and that both layers (4, 6), having the same width, are mutually offset. 2. Dachabdeckungsbahn nach Anspruch 1, dadurch gekennzeichnet, daß die untere Lage (4) aus EVA-PVC besteht.2. Roof covering sheet according to claim 1, characterized in that the lower layer (4) consists of EVA-PVC. 3. Dachabdeckungsbahn nach Anspruch 1 oder 2, dadurch gekenn­zeicnnet, daß die obere Lage (6) aus PVC besteht.3. Roof cover web according to claim 1 or 2, gekennzeicnnet characterized in that the upper layer (6) consists of PVC. 4. Dachabdeckungsbahn nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die untere Lage eine Dicke zwischen 1,0 und 1,5 mm, vorzugsweise etwa 1,2 mm aufweist.4. Roof covering sheet according to one of the preceding claims, characterized in that the lower layer has a thickness between 1.0 and 1.5 mm, preferably about 1.2 mm. 5. Dachabdeckungsbahn nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die obere Lage eine Dicke zwischen 0,2 und 0,3 mm, vorzugsweise etwa 0,25 mm, aufweist.5. Roof covering sheet according to one of the preceding claims, characterized in that the upper layer has a thickness between 0.2 and 0.3 mm, preferably about 0.25 mm. 6. Dachabdeckungsbahn nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die seitliche Versetzung der beiden Lagen (4, 6) zwischen 25 und 60 mm, Vorzugsweise etwa 40 mm be­trägt.6. Roof covering sheet according to one of the preceding claims, characterized in that the lateral displacement of the two layers (4, 6) is between 25 and 60 mm, preferably about 40 mm.
EP90115782A 1989-08-22 1990-08-17 Roof covering membrane Withdrawn EP0414143A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893927691 DE3927691A1 (en) 1989-08-22 1989-08-22 ROOF COVERING
DE3927691 1989-08-22

Publications (1)

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EP0414143A1 true EP0414143A1 (en) 1991-02-27

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EP90115782A Withdrawn EP0414143A1 (en) 1989-08-22 1990-08-17 Roof covering membrane

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EP (1) EP0414143A1 (en)
DE (1) DE3927691A1 (en)
FI (1) FI904154A0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9376824B2 (en) 2006-12-12 2016-06-28 United States Gypsum Company Nonwoven joint tape having low moisture expansion properties and method for using same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014109744A1 (en) 2014-07-11 2016-01-14 Manfred Wink Multilayer plastic web

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068879B (en) * 1959-11-12
DE8109869U1 (en) * 1981-04-02 1981-10-08 Rütgerswerke AG, 6000 Frankfurt "ROOF COVER WITH VAPOR RELAXATION LAYER"
GB2080196A (en) * 1980-06-16 1982-02-03 Grace W R & Co Self-adhesive roofing laminate having self-edge sealing properties
EP0104582A2 (en) * 1982-09-24 1984-04-04 Pantasote Inc. Roofing system
US4457983A (en) * 1982-05-24 1984-07-03 Northern Fibre Products Co. Roofing sheet with upper layer of higher melting point than asphalt
WO1986004106A1 (en) * 1984-12-28 1986-07-17 Decade Waterproofing And Products Pty. Ltd. Waterproof membrane
US4860514A (en) * 1986-10-22 1989-08-29 Kelly Thomas L Single ply roof membrane securing system and method of making and using same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH191784A (en) * 1935-04-20 1937-07-15 Sattig Philipp Double roofing felt and process for its manufacture.
DE2425119A1 (en) * 1974-05-24 1975-11-27 Heinz Jungblut Multi-layered flat roof membrane - with weatherproof-layered track on inset-reinforced track with intervening air layer
DE7735970U1 (en) * 1977-11-24 1980-11-27 Phoenix Ag, 2100 Hamburg FINAL COVERING FOR A SEALING ROOF COVERING

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068879B (en) * 1959-11-12
GB2080196A (en) * 1980-06-16 1982-02-03 Grace W R & Co Self-adhesive roofing laminate having self-edge sealing properties
DE8109869U1 (en) * 1981-04-02 1981-10-08 Rütgerswerke AG, 6000 Frankfurt "ROOF COVER WITH VAPOR RELAXATION LAYER"
US4457983A (en) * 1982-05-24 1984-07-03 Northern Fibre Products Co. Roofing sheet with upper layer of higher melting point than asphalt
EP0104582A2 (en) * 1982-09-24 1984-04-04 Pantasote Inc. Roofing system
WO1986004106A1 (en) * 1984-12-28 1986-07-17 Decade Waterproofing And Products Pty. Ltd. Waterproof membrane
US4860514A (en) * 1986-10-22 1989-08-29 Kelly Thomas L Single ply roof membrane securing system and method of making and using same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9376824B2 (en) 2006-12-12 2016-06-28 United States Gypsum Company Nonwoven joint tape having low moisture expansion properties and method for using same
US10352050B2 (en) 2006-12-12 2019-07-16 United States Gypsum Company Nonwoven joint tape having low moisture expansion properties and method for using same

Also Published As

Publication number Publication date
DE3927691A1 (en) 1991-03-14
FI904154A0 (en) 1990-08-22

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