EP1209298A1 - Stratifié, en particulier utilisé comme sous-toiture - Google Patents

Stratifié, en particulier utilisé comme sous-toiture Download PDF

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Publication number
EP1209298A1
EP1209298A1 EP00610119A EP00610119A EP1209298A1 EP 1209298 A1 EP1209298 A1 EP 1209298A1 EP 00610119 A EP00610119 A EP 00610119A EP 00610119 A EP00610119 A EP 00610119A EP 1209298 A1 EP1209298 A1 EP 1209298A1
Authority
EP
European Patent Office
Prior art keywords
film
layer
laminate according
laminate
water vapour
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.)
Granted
Application number
EP00610119A
Other languages
German (de)
English (en)
Other versions
EP1209298B1 (fr
Inventor
Eirik Sandberg Jensen
Niels Peter Kloch
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.)
Icopal AS
Original Assignee
Icopal AS
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 Icopal AS filed Critical Icopal AS
Priority to DK00610119T priority Critical patent/DK1209298T3/da
Priority to AT00610119T priority patent/ATE400711T1/de
Priority to EP00610119A priority patent/EP1209298B1/fr
Priority to DE60039440T priority patent/DE60039440D1/de
Publication of EP1209298A1 publication Critical patent/EP1209298A1/fr
Application granted granted Critical
Publication of EP1209298B1 publication Critical patent/EP1209298B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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 present invention relates to a water vapour permeable laminate, especially for use as an underroofing or underslating for roofs.
  • a heat insulated roof structure normally comprises an outer roof covering, such as tiles, an underslating or underroofing in the form of a substantially water impermeable plastic film or laminate, a layer of heat insulation, and an inner vapour barrier in the form of a plastic film or laminate.
  • the purpose of the underslating is to prevent rainwater and drift snow having passed through the roof cover from penetrating into the heat insulation.
  • small amounts of moisture are diffusing through the vapour barrier from the room under the roof structure and into the insulation layer.
  • this is done by forming a ventilating space between the underslating and the insulation, which ventilating space communicates with the ambient atmosphere. It is also known to dispense with that ventilating space.
  • the underslating should fulfil two apparently contradicting conditions, namely be substantially impermeable to moisture from the outside towards the inside, but permeable to moisture from the inside towards the outside.
  • the present invention provides an improved water vapour permeable laminate, which is suited for use as an underroofing or underslating for roofs in a non-ventilated roof structure.
  • the present invention provides a water vapour impermeable laminate, especially for use as underroofing or underslating for roofs, and comprising an outer layer formed by a perforated first film or foil, and an inner layer having at least some areas formed by a second, non-perforated film of the type having a water vapour diffusion resistance, which varies in dependency of the relative humidity of air in contact therewith, such that the vapour diffusion resistance is reduced, when the relative humidity increases, and vice versa, and the laminate according to the invention is characterised in that the water vapour diffusion resistance of the outer layer substantially exceeds the maximum water vapour resistance of the second film.
  • the total inner layer or film is made from the same plastic material.
  • the inner layer could be made from mutually spaced areas of such material having a diffusion resistance, which is dependent on the relative humidity of the contacting air, and the said spaced areas could be interconnected by connecting areas of film or foil being substantially impervious to water vapour or having a diffusion resistance being less dependent on the relative humidity of the contacting air.
  • Such laminate prevents water stemming from for example driving rain or drift snow from penetrating there through and into the insulation layer and the roof structure.
  • the laminate according to the invention functions like a one-way valve allowing moisture to pass from the inner room under the roof covering and outwards into the outer atmosphere, only.
  • the diffusion resistance of the outer layer in a non-perforated condition must be relatively high even when the relative humidity on the outer side thereof is high.
  • the diffusion resistance of the outer layer exceeds 20 m and preferably 90 m air column.
  • the diffusion resistance of the inner layer is less than 18 m, 15m, 10m, 5m or 1m air column at a relative humidity of at least 80% at an exposed inner surface of the inner layer. More preferred the diffusion resistance of the inner layer is much less, namely between 0.02 and 0.6 m air column at a relative humidity of at least 80% at the exposed inner surface of the inner layer.
  • the outer layer or the first film is perforated in order to allow water vapour to pass outwardly from the inner space of the building into the outer atmosphere.
  • the laminate according to the invention should be substantially impermeable to water, Therefore, the perforations of the first film or foil of the outer layer are preferably substantially impermeable to liquid water, but permeable to water vapour.
  • the perforations of the first film or foil may be substantially uniformly distributed over the area of the outer layer.
  • the perforations may be concentrated in certain mutually spaced areas, which may, for example be band shaped, circular, rectangular, etc.
  • the perforations may be made in any suitable manner, such as by punching, corona discharge, flame perforation or rendered breathable by an overload of fillers or defined between overlapping edge portions of for example band shaped parts.
  • Each of the perforations in the first film or foil may have a substantially uniform cross-sectional shape along its length transversely to the film or foil.
  • the cross-sectional area of at least some of the perforations of the first film or foil may increase from the outer surface of the film or foil towards the inner surface thereof. This means that each of said at least some perforations are funnel-shaped from the inner surface of the film or foil towards the outer surface thereof.
  • the minimum dimension or diameter of each of at least the majority of the perforations of the first film or foil of the outer layer is preferably smaller than 1.5 mm, preferably at the outer surface of the outer layer and the said minimum dimension or diameter of each of said majority of the perforations are preferably between 0.001 and 0.5 mm.
  • the resistance to diffusion of water vapour from the exposed surface of the inner layer to the outer surface of the outer layer should preferably be equal to or less than 0.6 m air column at a relative humidity of at least 80% at said exposed surface of the inner layer.
  • the second film of the inner layer may be made from any material having a varying diffusion resistance against water vapour as described above.
  • such material may be selected from the group consisting of polyamide, ethylene-vinyl alcohol copolymer, polyvinyl alcohol, polyurethane, protein derivatives, methylcellulose, cellophane, linseed oil alkyd, and bone glue.
  • the first film or foil of the outer layer may be made from any film or foil which in its imperforated condition is substantially impervious to water vapour.
  • the first film or foil may be made from one or more of the materials selected from the group consisting of aluminium and other metals, polyethylene, polypropylene, polyethylene terephthalate, metallised polyethylene terephthalate, and polyvinylidene chloride.
  • the laminate according to the invention further comprises an intermediate layer of a water vapour transmitting material.
  • water vapour having passed the inner layer of the laminate may distribute in the vapour transmitting or porous intermediate layer and find its way to the perforations of the perforated outer layer.
  • the intermediate layer is a matted material, for example spun bonded felt or spun bonded needle felt.
  • the material of the intermediate layer preferably does not include organic material, which may support the growth of microorganisms.
  • the material of the intermediate layer may preferably be water absorbing in order to be able to absorb possible condensed water vapour.
  • the water absorbing material of the intermediate layer may include a hydrophilic material.
  • the intermediate layer may, for example, comprise or consist of felt having a weight of between 10 and 100 g/m 2 , preferably 20-80 and more preferred 40-60 g/m 2 , in its dry condition.
  • the intermediate layer may comprise one or more of any of the following materials: oil hydrophilised polyethylene terephthalate fibres, polypropylene fibres, and acrylic fibres or fibres comprising hydrophilic and hydrophobic components, such as polypropylene and poly-hydroxyethyl methacrylate.
  • the present invention further comprises a roof structure comprising an outer roofing and an inner roofing or underroofing impervious to water, and the roof structure according to the invention is characterised in that the inner roofing comprises any of the above described embodiments of the laminate according to the invention, the outer layer of said laminate being positioned adjacent to the inner surface of the outer roofing.
  • Fig. 1 is a sectional view of a roof structure according to the invention.
  • This roof structure of a building (not shown) includes a wooden structure comprising a plurality of upper and lower battens 10 and 11, respectively, extending between the roof ridge and the eaves, and counter battens 12 extending transversely to the battens 10 and 11.
  • a roof covering 13 made up by tiles or other roofing plates is fastened to the upper battens 10.
  • the roof structure further comprises an insulating layer 14, which is arranged between the upper battens 10 and the lower battens 11, and which may, for example, be made from stone wool or fibre glass.
  • a ceiling lining 15 may be fastened to the bottom surfaces of the lower battens.
  • an underroofing or underslating in the form of a laminate 16 in accordance with the invention and shown in further detail in Fig. 2 is arranged between the bottom surfaces of the upper battens 10 and the upper surface of the insulating layer 14.
  • Fig 2 is a cross-sectional view of an embodiment of the laminate 16 according to the invention.
  • This laminate 16 comprises an upper or outer layer 18, which may be in the form of a plastic film or a metal foil, a lower or an inner layer or plastic film 19, and an internnediate layer 20 of a porous, felt-like material.
  • the upper layer 18 is made from a material, which is not only impermeable to liquid water, but also substantially impermeable to water vapour. However, in order to allow water vapour to pass through the upper layer 18 it is provided with a great plurality of small through openings or perforations 21. The diameter of each of these perforations 21 is so small that liquid water cannot pass through the perforations from the outer surface of the upper layer. The perforations may be distributed uniformly over the total area of the upper layer or be arranged in mutually spaced groups as shown in Fig. 2.
  • the lower or inner layer 19 is a non-perforated plastic film of the type having a water vapour diffusion resistance, which is reduced when the relative humidity of the air in contact therewith increases, and vice versa.
  • the water vapour diffusion resistance of the inner layer 19 is between 0.02 and 0.6 m air column at a relative humidity of at least 80% at the inner surface thereof.
  • the intermediate layer 20 may, for example, be made from an inorganic felt material.
  • the underroofing 16 in accordance with the present invention prevents liquid water from passing there through, and the water vapour diffusion resistance of the of the material from which the film or foil is made is high. Therefore, no or negligible amounts only of water vapour will pass inwardly through the outer layer 18. If, however, for some reason the humidity of the insulating layer and of the air around the wooden roof structure remains high for a longer period of time, detrimental micro-organisms may attack the wooden roof structure. Therefore, it is important that the humidity of the air in the space defined between the upper laminate 16 and the lower laminate 17 is kept below a certain upper limit.
  • the laminate or underroofing 16 may be obtained by the laminate or underroofing 16 according to the invention.
  • the humidity of the air enclosed in the space between the laminates 16 and 17 increases the water vapour diffusion resistance of the lower or inner layer 19 of the laminate 16 decreases so that water vapour may pass into the porous and possibly water absorbing intermediate layer 20 of the laminate 17. From the intermediate layer 20 the humidity may pass out into the ambient atmosphere via the perforations 21 in the outer layer 18.
  • the resistance to diffusion of water vapour from the exposed surface of the inner layer 19 to the outer surface of the outer layer 18 of the laminate 16 is equal to or less than 0.6 m air column at a relative humidity of at least 80% at inner surface of the inner layer 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP00610119A 2000-11-22 2000-11-22 Stratifié, en particulier utilisé comme sous-toiture Expired - Lifetime EP1209298B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DK00610119T DK1209298T3 (da) 2000-11-22 2000-11-22 Et laminat, især til anvendelse som undertagbeklædning
AT00610119T ATE400711T1 (de) 2000-11-22 2000-11-22 Mehrschichtwerkstoff, insbesondere zur verwendung als unterdach
EP00610119A EP1209298B1 (fr) 2000-11-22 2000-11-22 Stratifié, en particulier utilisé comme sous-toiture
DE60039440T DE60039440D1 (de) 2000-11-22 2000-11-22 Mehrschichtwerkstoff, insbesondere zur Verwendung als Unterdach

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00610119A EP1209298B1 (fr) 2000-11-22 2000-11-22 Stratifié, en particulier utilisé comme sous-toiture

Publications (2)

Publication Number Publication Date
EP1209298A1 true EP1209298A1 (fr) 2002-05-29
EP1209298B1 EP1209298B1 (fr) 2008-07-09

Family

ID=8174424

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00610119A Expired - Lifetime EP1209298B1 (fr) 2000-11-22 2000-11-22 Stratifié, en particulier utilisé comme sous-toiture

Country Status (4)

Country Link
EP (1) EP1209298B1 (fr)
AT (1) ATE400711T1 (fr)
DE (1) DE60039440D1 (fr)
DK (1) DK1209298T3 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003091508A1 (fr) * 2002-04-23 2003-11-06 Henriksen Holding Aps Plaque composite pour sous-toiture et ses procedes de montage
EP1296002A3 (fr) * 2001-09-24 2004-02-11 Icopal A/S Une membrane pare-vapeur ou membrane de sous-toiture pour bâtiments
FR2871822A1 (fr) * 2004-06-17 2005-12-23 Icopal Sas Soc Par Actions Sim Isolant mince reflechissant pour sous-toiture
WO2007010388A1 (fr) * 2005-07-15 2007-01-25 Saint-Gobain Isover Substrat a base de materiau de construction possedant un retardateur de vapeur
EP2522784A1 (fr) * 2011-05-09 2012-11-14 Icopal Danmark A/S Membrane stratifiée imperméable à l'eau à utiliser dans les bâtiments
US8820028B2 (en) 2007-03-30 2014-09-02 Certainteed Corporation Attic and wall insulation with desiccant
AT13861U1 (de) * 2012-09-27 2014-10-15 Juta A S Schützendes, wasserisolierendes Wandband oder Unterdachband
US9115498B2 (en) 2012-03-30 2015-08-25 Certainteed Corporation Roofing composite including dessicant and method of thermal energy management of a roof by reversible sorption and desorption of moisture
EP2951014B1 (fr) 2013-01-29 2016-05-25 Silu Verwaltung AG Barrière pare-vapeur orientée variable selon l'humidité

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2390435T3 (pl) 2010-05-25 2013-09-30 Icopal Danmark As Urządzenie do redukcji ruchów warstwy dolnej dachu w konstrukcji dachowej

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567080A (en) * 1983-06-20 1986-01-28 V.I.K.-Consult Aps Vapor barrier
WO2000037751A1 (fr) * 1998-12-21 2000-06-29 Icopal A/S Pare-vapeur d'eau et son procede de fabrication

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567080A (en) * 1983-06-20 1986-01-28 V.I.K.-Consult Aps Vapor barrier
WO2000037751A1 (fr) * 1998-12-21 2000-06-29 Icopal A/S Pare-vapeur d'eau et son procede de fabrication

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1296002A3 (fr) * 2001-09-24 2004-02-11 Icopal A/S Une membrane pare-vapeur ou membrane de sous-toiture pour bâtiments
WO2003091508A1 (fr) * 2002-04-23 2003-11-06 Henriksen Holding Aps Plaque composite pour sous-toiture et ses procedes de montage
FR2871822A1 (fr) * 2004-06-17 2005-12-23 Icopal Sas Soc Par Actions Sim Isolant mince reflechissant pour sous-toiture
WO2006008351A1 (fr) * 2004-06-17 2006-01-26 Icopal Sas Isolant mince reflechissant pour sous-toiture
EP1756379B1 (fr) 2004-06-17 2016-03-30 Icopal Sas Isolant mince reflechissant pour sous-toiture
WO2007010388A1 (fr) * 2005-07-15 2007-01-25 Saint-Gobain Isover Substrat a base de materiau de construction possedant un retardateur de vapeur
US8820028B2 (en) 2007-03-30 2014-09-02 Certainteed Corporation Attic and wall insulation with desiccant
EP2522784A1 (fr) * 2011-05-09 2012-11-14 Icopal Danmark A/S Membrane stratifiée imperméable à l'eau à utiliser dans les bâtiments
US9115498B2 (en) 2012-03-30 2015-08-25 Certainteed Corporation Roofing composite including dessicant and method of thermal energy management of a roof by reversible sorption and desorption of moisture
US9695592B2 (en) 2012-03-30 2017-07-04 Certainteed Corporation Roofing composite including dessicant and method of thermal energy management of a roof by reversible sorption and desorption of moisture
AT13861U1 (de) * 2012-09-27 2014-10-15 Juta A S Schützendes, wasserisolierendes Wandband oder Unterdachband
EP2951014B1 (fr) 2013-01-29 2016-05-25 Silu Verwaltung AG Barrière pare-vapeur orientée variable selon l'humidité

Also Published As

Publication number Publication date
EP1209298B1 (fr) 2008-07-09
DK1209298T3 (da) 2008-11-17
ATE400711T1 (de) 2008-07-15
DE60039440D1 (de) 2008-08-21

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