EP0821755B1 - Vapour barrier for use in the heat insulation of buildings - Google Patents

Vapour barrier for use in the heat insulation of buildings Download PDF

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Publication number
EP0821755B1
EP0821755B1 EP96909977A EP96909977A EP0821755B1 EP 0821755 B1 EP0821755 B1 EP 0821755B1 EP 96909977 A EP96909977 A EP 96909977A EP 96909977 A EP96909977 A EP 96909977A EP 0821755 B1 EP0821755 B1 EP 0821755B1
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EP
European Patent Office
Prior art keywords
vapour
vapour barrier
interior side
buildings
diffusion
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German (de)
French (fr)
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EP0821755A1 (en
Inventor
Hartwig Künzel
Theo Grosskinsky
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/625—Sheets or foils allowing passage of water vapor but impervious to liquid water; house wraps
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/16—Insulating devices or arrangements in so far as the roof covering is concerned, e.g. characterised by the material or composition of the roof insulating material or its integration in the roof structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/36—Positioning; Changing position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/13—Parts concerned of the handled material
    • B65H2701/131—Edges
    • B65H2701/1313—Edges trailing edge

Definitions

  • the invention relates to a room side Vapor barrier for use in thermal insulation of buildings, especially for thermal insulation measures in new buildings and in the renovation of old buildings.
  • Vapor barrier is known from DE-A-3 235 246.
  • thermal insulation measures when building new buildings and renovating old buildings carried out are also the Consider cost issue. Also included the external appearance of the building is an essential one Factor which is also a limitation of the actually Represents feasible.
  • the tolerable moisture load of the timber frame must in particular under wintry conditions by the possible Vapor diffusion also through the vapor barrier on the room side be secured.
  • in the summer months through the joints between the wooden stands and the infiltration of rain moisture can also dry out inside, in spite of one improved thermal insulation behavior also a long service life of the wood used for the framework to back up.
  • a room-side vapor barrier to create that is able to take among different Ambient conditions, variable in use, a water vapor exchange between the indoor air and the inside to secure a component that damages the used building materials as far as possible due to moisture excludes.
  • this task is characterized by Part of claim 1 mentioned Features resolved.
  • the vapor barrier on the room side according to the invention which one also called “damp adaptive vapor barrier” can be used as an essential material one that a water vapor diffusion resistance dependent on the ambient humidity has and for use when building in buildings an adequate train and Compressive strength.
  • the material used for the vapor barrier in the form of a film or as a coating on a carrier material should have a water vapor diffusion resistance value (s d value) of 2 to 5 m at a relative humidity of the atmosphere surrounding the vapor barrier in the range between 30% and 50% diffusion-equivalent air layer thickness and at a relative humidity in the range of 60% to 80%, as is typical for the summer months, a water vapor diffusion resistance (s d value), which is less than 1 m diffusion-equivalent air layer thickness.
  • the invention can already uses mentioned in the prior art also with metal roofs or wooden stand constructions be used and there in addition to improvement thermal insulation to reduce construction costs.
  • a polyamide 6 As a material for the vapor barrier that the desired Has properties, for example a polyamide 6, a polyamide 4 or polyamide 3, as in particular from BIEDERBICK, K., "Plastics - short and flush ", Vogel-Verlag Würzburg, are used become.
  • These polyamides are used as films and have the required properties in with respect to the water vapor diffusion resistance on. They also have the in use strengths required in buildings so that they can be used without additional effort.
  • the fat the films can range from 10 ⁇ m to 2 mm, preferably are in the range of 20 ⁇ m to 100 ⁇ m.
  • the carrier materials preferably have a low water vapor diffusion resistance on, and the required properties of the invention Vapor retardants are essentially from the coating.
  • Fiber-reinforced materials can be used for the carrier or carriers
  • Cellulosic materials such as Paper webs, foils from synthetic fiber cobwebs or perforated polyethylene films are also used.
  • the material can also be used as a coating on a Carrier material available.
  • the coating can one-sided on the carrier material, but also in special Cases between two layers of substrate be sandwiched. In the latter case the coating material is from both sides effectively protected against mechanical attack and can thereby the desired over a long period of time Guarantee water vapor diffusion.
  • Several such layer structures can also be superimposed being constructed.
  • plastic dispersions methyl cellulose, Linseed oil alkyd, bone glue or protein derivatives used as a coating material for the carrier become.
  • the carrier material can be applied to the side on which there is little or no protection against mechanical Influencing is required.
  • the assembly can in this case so that the protective backing material to the facing the room or facing away from the room Side shows.
  • the vapor barrier according to the invention is used alone made of a film made of polyamide 6. Experiments with a film thickness of 50 microns performed.
  • the polyamide 6 films used are currently from the company MF-Folien GmbH in Kempten, DE.
  • the vapor diffusion resistance of the moisture-adaptive vapor barrier was determined according to DIN 52 615 in the dry area (3/50% relative humidity (RH)) and in the wet area (50/93% RH) as well as in two intermediate humidity areas (33/50% and 50/75% RH) certainly.
  • the result for the diffusion-equivalent air layer thickness (s d value) of the vapor barrier with a thickness of 50 ⁇ m is shown in FIG. 1 as a function of the mean relative humidity prevailing in the test.
  • the moisture-adaptive vapor barrier thus opens up the Possibility of steep roofs in the old building area without large Insulate damage risk cost-effectively.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Building Environments (AREA)
  • Laminated Bodies (AREA)
  • Thermal Insulation (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Lubricants (AREA)
  • Braking Arrangements (AREA)
  • Sealing Material Composition (AREA)

Abstract

The invention relates to a vapour barrier for use in the heat insulation of buildings, especially for use in new buildings and the renovation of old ones. The vapour barrier of the invention can effect water vapour exchange in various environmental conditions. This is accomplished by the use as the essential material of a material having a water vapour diffusion resistance depending on the environmental humidity and also had adequate tensile and tear strength.

Description

Die Erfindung betrifft eine raumseitig angeordnete Dampfbremse für den Einsatz zur Wärmedämmung von Gebäuden, insbesondere für Wärmedämmaßnahmen beim Neubau und bei der Sanierung von Altbauten. Eine solche Dampfbremse ist aus der DE-A-3 235 246 bekannt.The invention relates to a room side Vapor barrier for use in thermal insulation of buildings, especially for thermal insulation measures in new buildings and in the renovation of old buildings. Such Vapor barrier is known from DE-A-3 235 246.

Zur Verringerung des Kohlendioxidausstoßes, der durch die Heizung von Gebäuden entsteht, werden Wärmedämmaßnahmen beim Bau neuer Gebäude und bei der Altbausanierung durchgeführt. Aus für den Bauherrn stets zu beachtender ökonomischer Sicht, ist hierbei auch die Kostenfrage zu berücksichtigen. Außerdem ist dabei das äußere Erscheinungsbild des Gebäudes ein wesentlicher Faktor, der ebenfalls eine Begrenzung des tatsächlich Machbaren darstellt. So können beispielsweise solche Wärmedämmaßnahmen an Gebäuden, die über ein Sichtfachwerk verfügen, nur durch innenliegende Dämmschichten durchgeführt werden. Die erträgliche Feuchtebelastung des Fachwerkholzes muß dabei insbesondere unter winterlichen Bedingungen durch die mögliche Dampfdiffusion auch durch die raumseitige Dampfbremse gesichert werden. Im Gegensatz dazu muß in den Sommermonaten die durch die Fugen zwischen den Holzständern und der Ausfachung eindringende Regenfeuchte auch nach innen austrocknen können, um trotz eines verbesserten Wärmdämmverhaltens auch eine lange Lebensdauer des für das Fachwerk verwendeten Holzes zu sichern.To reduce carbon dioxide emissions from the heating of buildings arises, thermal insulation measures when building new buildings and renovating old buildings carried out. Always closed for the client observing economic perspective, is also the Consider cost issue. Also included the external appearance of the building is an essential one Factor which is also a limitation of the actually Represents feasible. For example such thermal insulation measures on buildings that have a Have exposed timber framing only through internal insulation layers be performed. The tolerable moisture load of the timber frame must in particular under wintry conditions by the possible Vapor diffusion also through the vapor barrier on the room side be secured. In contrast, in the summer months through the joints between the wooden stands and the infiltration of rain moisture can also dry out inside, in spite of one improved thermal insulation behavior also a long service life of the wood used for the framework to back up.

Ähnliche Schwierigkeiten treten auch bei der nachträglichen Vollsparrendämmung bei Stelldächern mit einer dampfdichten Vordeckung (z.B. Dachpappe auf Holzschalung) auf. So zeigten Untersuchungen des Fraunhofer Institutes für Bauphysik, daß bei innen angebrachten Dampfbremsen mit einem Wasserdampf-Diffusionswiderstand (sd-Wert), der kleiner als 10 m diffusionsäquivalente Luftschichtdicke ist, insbesondere bei nach Norden ausgerichteten Dächern, die Austrocknung der Holzschalung im Sommer nicht ausreichend ist, um eine unbedenkliche Holzfeuchtesituation zu erreichen. So können raumseitig angebrachte Dampfsperren Feuchteanreicherungen, die beispielsweise durch Konvektion hervorgerufen werden, nicht mehr in ausreichendem Maße abführen.Similar difficulties also arise with the subsequent full rafter insulation on roofs with a vapor-tight covering (eg roofing felt on wooden formwork). For example, studies by the Fraunhofer Institute for Building Physics have shown that when vapor control brakes are installed on the inside with a water vapor diffusion resistance (s d value) that is less than 10 m diffusion-equivalent air layer thickness, especially in the case of north-facing roofs, the wooden formwork does not dry out in summer is to achieve a safe wood moisture situation. For example, vapor barriers installed on the room side can no longer sufficiently remove moisture accumulations caused, for example, by convection.

Ausgehend von diesen genannten Nachteilen, ist es Aufgabe der Erfindung, eine raumseitige Dampfbremse zu schaffen, die in der Lage ist, unter verschiedenen Umgebungsbedingungen, variabel im Einsatz, einen Wasserdampfaustausch zwischen der Raumluft und dem Inneren eines Bauteils zu sichern, der Beschädigungen der verwendeten Baumaterialien durch Feuchtigkeit weitestgehend ausschließt.Based on these disadvantages, it is Object of the invention, a room-side vapor barrier to create that is able to take among different Ambient conditions, variable in use, a water vapor exchange between the indoor air and the inside to secure a component that damages the used building materials as far as possible due to moisture excludes.

Erfindungsgemäß wird diese Aufgabe durch die im kennzeichnenden Teil des Patentanspruchs 1 genannten Merkmale gelöst.According to the invention, this task is characterized by Part of claim 1 mentioned Features resolved.

Weiterbildungen und Ausgestaltungen der Erfindung ergeben sich bei Verwendung der in den untergeordneten Ansprüchen genannten Merkmale.Developments and refinements of the invention result from using the subordinate Features mentioned claims.

Die erfindungsgemäße raumseitige Dampfbremse, die man auch als "feuchte adaptive Dampfbremse" bezeichnen kann, verwendet als wesentliches Material eines, das einen von der Umgebungsfeuchte abhängigen Wasserdampf-Diffusionswiderstand aufweist und für den Einsatz beim Bau in Gebäuden eine ausreichende Zug- und Druckfestigkeit aufweist. The vapor barrier on the room side according to the invention, which one also called "damp adaptive vapor barrier" can be used as an essential material one that a water vapor diffusion resistance dependent on the ambient humidity has and for use when building in buildings an adequate train and Compressive strength.

Das in Form einer Folie oder als Beschichtung auf einem Trägermaterial eingesetzte Material für die Dampfbremse soll bei einer relativen Feuchte der die Dampfbremse umgebenden Atmosphäre im Bereich zwischen 30 % und 50 % einen Wasserdampf-Diffusionswiderstandswert (sd-Wert) von 2 bis 5 m einer diffusionsäquivalenten Luftschichtdicke und bei einer relativen Feuchte im Bereich von 60 % bis 80 %, wie er beispielsweise für die Sommermonate typisch ist, einen Wasserdampf-Diffusionswiderstand (sd-Wert), der kleiner als 1 m diffusionsäquivalente Luftschichtdicke ist, aufweisen.The material used for the vapor barrier in the form of a film or as a coating on a carrier material should have a water vapor diffusion resistance value (s d value) of 2 to 5 m at a relative humidity of the atmosphere surrounding the vapor barrier in the range between 30% and 50% diffusion-equivalent air layer thickness and at a relative humidity in the range of 60% to 80%, as is typical for the summer months, a water vapor diffusion resistance (s d value), which is less than 1 m diffusion-equivalent air layer thickness.

Dies führt dazu, daß unter winterlichen Bedingungen ein höherer Wasserdampf-Diffusionswiderstand als unter sommerlichen Verhältnissen erreicht wird. Dadurch kann die Austrocknung im Sommer begünstigt werden, ohne daß unter winterlichen Bedingungen die Feuchtezufuhr einen Wert annehmen kann, der eine Beeinträchtigung der verwendeten Materialien und des Gebäudes an sich hervorrufen kann.This results in winter conditions a higher water vapor diffusion resistance than below summer conditions is reached. Thereby dehydration can be promoted in summer, without the supply of moisture under winter conditions can assume a value that is an impairment the materials used and the building can evoke in itself.

Die Erfindung kann neben den bereits bei den Nachteilen des Standes der Technik genannten Einsatzzwecken auch bei Metalldächern oder Holzständerkonstruktionen verwendet werden und auch dort neben der Verbesserung der Wärmedämmung zur Senkung der Baukosten führen.In addition to the disadvantages, the invention can already uses mentioned in the prior art also with metal roofs or wooden stand constructions be used and there in addition to improvement thermal insulation to reduce construction costs.

Als Material für die Dampfbremse, das die gewünschten Eigenschaften aufweist, kann beispielsweise ein Polyamid 6, ein Polyamid 4 oder Polyamid 3, wie sie insbesondere aus BIEDERBICK, K., "Kunststoffe - kurz und bündig", Vogel-Verlag Würzburg, bekannt sind, verwendet werden. Diese Polyamide werden als Folien eingesetzt und weisen die geforderten Eigenschaften in bezug auf den Wasserdampf-Diffusionswiderstand immanent auf. Außerdem verfügen sie über die im Einsatz in Gebäuden erforderlichen Festigkeiten, so daß sie ohne zusätzlichen Aufwand einsetzbar sind. Die Dicke der Folien kann im Bereich von 10 µm bis 2 mm, bevorzugt im Bereich von 20 µm bis 100 µm liegen.As a material for the vapor barrier that the desired Has properties, for example a polyamide 6, a polyamide 4 or polyamide 3, as in particular from BIEDERBICK, K., "Plastics - short and flush ", Vogel-Verlag Würzburg, are used become. These polyamides are used as films and have the required properties in with respect to the water vapor diffusion resistance on. They also have the in use strengths required in buildings so that they can be used without additional effort. The fat the films can range from 10 μm to 2 mm, preferably are in the range of 20 µm to 100 µm.

Es können jedoch auch andere Materialien eingesetzt werden, die eine nicht ausreichende Festigkeit aufweisen und auf geeignete Trägermaterialien aufbringbar sind. Die Trägermaterialien weisen dabei bevorzugt einen geringen Wasserdampf-Diffusionswiderstand auf, und die geforderten Eigenschaften der erfindungsgemäßen Dampfbremse werden im wesentlichen von der Beschichtung bewirkt.However, other materials can also be used that have insufficient strength and can be applied to suitable carrier materials are. The carrier materials preferably have a low water vapor diffusion resistance on, and the required properties of the invention Vapor retardants are essentially from the coating.

Als Materialien für den bzw. die Träger können faserverstärkte Zellulosematerialien, wie beispielsweise Papierbahnen, Folien aus Kunstfaserspinngeweben oder auch perforierte Polyethylenfolien eingesetzt werden.Fiber-reinforced materials can be used for the carrier or carriers Cellulosic materials such as Paper webs, foils from synthetic fiber cobwebs or perforated polyethylene films are also used.

Das Material kann auch als Beschichtung auf einem Trägermaterial vorliegen. Die Beschichtung kann dabei einseitig auf das Trägermaterial, aber auch in besonderen Fällen zwischen zwei Trägermaterialschichten sandwichartig aufgenommen werden. Im letzten Fall wird das Beschichtungsmaterial von beiden Seiten wirksam gegen mechanischen Angriff geschützt und kann dadurch über einen langen Zeitraum die gewünschte Wasserdampfdiffusion garantieren. Es können auch mehrere solcher Schichtaufbauten übereinandergelegt aufgebaut werden.The material can also be used as a coating on a Carrier material available. The coating can one-sided on the carrier material, but also in special Cases between two layers of substrate be sandwiched. In the latter case the coating material is from both sides effectively protected against mechanical attack and can thereby the desired over a long period of time Guarantee water vapor diffusion. Several such layer structures can also be superimposed being constructed.

Für die Beschichtung des Trägermaterials können verschiedene Stoffe und Materialien eingesetzt werden. So können beispielsweise mit geeigneten Beschichtungsverfahren Polymere, wie z.B. modifizierte Polyvinylalkohole, aufgetragen werden. Dabei unterscheidet sich der Wasserdampf-Diffussionswiderstand, gemessen nach DIN 52615, um mehr als eine Zehnerpotenz bei einer trockenen und einer feuchten Umgebung.Various can be used to coat the carrier material Fabrics and materials are used. For example, with suitable coating processes Polymers such as modified polyvinyl alcohols, be applied. It makes a difference the water vapor diffusion resistance, measured according to DIN 52615, by more than a power of ten in a dry and a damp environment.

Es können aber auch Kunststoffdispersionen, Methylcellulose, Leinölalkyd, Knochenleim oder Proteinderivate als Beschichtungsmaterial für den Träger verwendet werden.However, plastic dispersions, methyl cellulose, Linseed oil alkyd, bone glue or protein derivatives used as a coating material for the carrier become.

Im Falle der einseitigen Beschichtung des Trägermaterials kann diese auf der Seite aufgebracht werden, auf der kein oder nur ein geringer Schutz gegen mechanische Beeinflussung erforderlich ist. Die Montage der erfindungsgemäßen Dampfbremse kann in diesem Fall so erfolgen, daß das schützende Trägermaterial zu der dem Raum zugewandten oder zu der dem Raum abgewandten Seite zeigt.In the case of one-sided coating of the carrier material can be applied to the side on which there is little or no protection against mechanical Influencing is required. The assembly The vapor barrier according to the invention can in this case so that the protective backing material to the facing the room or facing away from the room Side shows.

Nachfolgend soll die Erfindung an einem Beispiel näher erläutert werden.The invention will be explained in more detail below using an example are explained.

Dabei wird die erfindungsgemäße Dampfbremse allein aus einer Folie, die aus Polyamid 6 besteht, gebildet. Es wurden Versuche mit einer Foliendicke von 50 µm durchgeführt. Die verwendeten Polyamid-6-Folien werden zur Zeit von der Firma MF-Folien GmbH in Kempten, DE, hergestellt.The vapor barrier according to the invention is used alone made of a film made of polyamide 6. Experiments with a film thickness of 50 microns performed. The polyamide 6 films used are currently from the company MF-Folien GmbH in Kempten, DE.

Hygrisches Verhalten im LaborversuchHygric behavior in laboratory tests

Der Dampfdiffusionswiderstand der feuchteadaptiven Dampfbremse wurde gemäß DIN 52 615 im Trockenbereich (3/50 % relative Feuchte (r.F)) und im Feuchtbereich (50/93 % r.F.) sowie in zwei dazwischenliegenden Feuchtebereichen (33/50 % und 50/75 % r.F.) bestimmt. Das Ergebnis für die diffusionsäquivalente Luftschichtdicke (sd-Wert) der Dampfbremse mit einer Dicke von 50 µm ist in Abhängigkeit von der im Versuch herrschenden mittleren relativen Feuchte in Figur 1 dargestellt. Zwischen dem sd-Wert im Trocken- und im Feuchtbereich liegt mehr als eine Zehnerpotenz, so daß auch unter praktischen Raumluftbedingungen, die sich zwischen 30 % und 50 % im Winter und zwischen etwa 60 % und 70 % im Sommer bewegen, eine deutliche Steuerbarkeit der Diffusionsströme durch die Dampfbremse zu erwarten ist.The vapor diffusion resistance of the moisture-adaptive vapor barrier was determined according to DIN 52 615 in the dry area (3/50% relative humidity (RH)) and in the wet area (50/93% RH) as well as in two intermediate humidity areas (33/50% and 50/75% RH) certainly. The result for the diffusion-equivalent air layer thickness (s d value) of the vapor barrier with a thickness of 50 μm is shown in FIG. 1 as a function of the mean relative humidity prevailing in the test. There is more than a power of ten between the s d value in the dry and wet areas, so that there is clear controllability even under practical indoor air conditions, which range between 30% and 50% in winter and between about 60% and 70% in summer the diffusion currents through the vapor barrier is to be expected.

Praktisches AnwendungsbeispielPractical application example

Rechnerische Untersuchungen haben gezeigt, daß Steildächer mit dampfdichten Unterdächern nach Einbau einer 10 cm bis 20 cm dicken Zwischensparren-Volldämmung aus Mineralfaser trotz raumseitiger Dampfbremse innerhalb weniger Jahre so feucht werden können, daß Schäden unvermeidbar sind. Besonders kritisch ist die Situation bei hohen Raumluftfeuchten, die beispielsweise zwischen 50 % r.F. im Januar und 70 % r.F. im Juli variieren, wenn gleichzeitig die kurzwelligen Strahlungsgewinne durch Nordorientierung relativ gering ausfallen. Im folgenden wird deshalb der Einfluß der feuchteadaptiven Dampfbremse auf den langfristigen Feuchtehaushalt solcher Konstruktionen unter Holzkirchner Klimabedingungen rechnerisch mit Hilfe eines bereits mehrfach experimentell verifizierten Verfahrens abgeschätzt.Computational studies have shown that pitched roofs with vapor-tight sub-roofs after installing one 10 cm to 20 cm thick intermediate rafter insulation made of mineral fiber despite the vapor barrier on the room side can get so damp within a few years that Damage is inevitable. It is particularly critical Situation with high room humidity, for example between 50% RH in January and 70% RH in the July vary when the short-wave at the same time Radiation gains due to north orientation are relatively low fail. The following is therefore the influence the moisture-adaptive vapor barrier on the long-term Moisture balance of such constructions under Holzkirchner's climatic conditions arithmetically with the help one already experimentally verified several times Procedure estimated.

Ausgehend von einem ungedämmten, nordorientieren Steildach (28° Neigung) mit Holzschalung, Bitumenpappe und Ziegeleindeckung, das sich mit seiner Umgebung im hygroskopischen Gleichgewicht befindet, ist das Feuchteverhalten nach Einbau einer Zwischensparrendämmung mit einer herkömmlichen und mit der feuchteadaptiven raumseitigen Dampfbremse in Fig. 2 dargestellt. Oben ist der Verlauf der Gesamtfeuchte im Dach und unten der Verlauf der Holzfeuchte der Schalungsbretter über einen Zeitraum von 10 Jahren aufgezeichnet. Während die Feuchte im Dach mit der herkömmlichen Dampfbremse unter jahreszeitlichen Schwankungen rasch ansteigt, wobei bereits im ersten Jahr langfristig bedenkliche Holzfeuchtewerte (> 20 M.-%) auftreten, ist im Dach mit der feuchteadaptiven Dampfbremse keine Feuchteakkumulation feststellbar. Im Sommer fällt dort die Holzfeuchte stets unter 20 M-%, so daß hier keine Feuchteschäden zu befürchten sind.Starting from an uninsulated, north-facing Pitched roof (28 ° inclination) with wooden formwork, bitumen cardboard and tile covering that blends with its surroundings is in hygroscopic balance, that is Moisture behavior after installing an intermediate rafter insulation with a conventional and with the moisture adaptive room side vapor barrier shown in Fig. 2. Above is the course of the total moisture in the Roof and below the course of the wood moisture of the formwork boards recorded over a period of 10 years. While the humidity in the roof with the conventional Vapor barrier under seasonal fluctuations increases rapidly, already in the first year Long-term questionable wood moisture values (> 20% by mass) occur is in the roof with the moisture adaptive Vapor barrier no moisture accumulation ascertainable. The wood moisture always falls there in summer 20% by mass, so that there is no fear of moisture damage here are.

Die feuchteadaptive Dampfbremse eröffnet somit die Möglichkeit, Steildächer im Altbaubereich ohne großes Schadensrisiko kostengünstig zu dämmen.The moisture-adaptive vapor barrier thus opens up the Possibility of steep roofs in the old building area without large Insulate damage risk cost-effectively.

Claims (9)

  1. A vapour barrier for use in the thermal insulation of buildings and arranged on the interior side,
    characterized in that
    at least part of the vapour barrier has been formed from a material whose resistance to water-vapour diffusion depends on the ambient humidity, with the proviso that when the relative humidity of the atmosphere surrounding the vapour barrier is within the range from 30% to 50% the water-vapour diffusion resistance sd value of the material is from 2 to 5 m diffusion-equivalent air-layer thickness and when the relative humidity is within the range from 60% to 80% the water-vapour diffusion resistance sd value of the material is < 1 m diffusion-equivalent air-layer thickness.
  2. Vapour barrier arranged on the interior side and according to Claim 1,
    characterized in that the material is a film.
  3. Vapour barrier arranged on the interior side and according to Claim 2,
    characterized in that the film has been selected from nylon-6, nylon-4 and nylon-3.
  4. Vapour barrier arranged on the interior side and according to Claim 2 or 3,
    characterized in that the thickness of the film is from 10 µm to 2 mm, preferably from 20 µm to 100 µm.
  5. Vapour barrier arranged on the interior side and according to Claim 1,
    characterized in that the material is a polymer coating applied to a support material.
  6. Vapour barrier arranged on the interior side and according to Claim 5,
    characterized in that the polymer for the polymer coating has been selected from polyvinyl alcohol, a synthetic-polymer dispersion, methylcellulose, linseed oil alkyd, bone glue and protein derivatives.
  7. Vapour barrier arranged on the interior side and according to any of Claims 1 to 6,
    characterized in that the material has been applied on a support material with a low water-vapour diffusion resistance, as a coating.
  8. Vapour barrier arranged on the interior side and according to any of Claims 1 to 7,
    characterized in that the material has been placed to form a sandwich between two layers of a support material with low water-vapour diffusion resistance.
  9. Vapour barrier arranged on the interior side and according to any of Claims 1 to 8,
    characterized in that the support material has been selected from fibre-reinforced cellulose materials.
EP96909977A 1995-04-19 1996-04-18 Vapour barrier for use in the heat insulation of buildings Expired - Lifetime EP0821755B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9630289T SI0821755T1 (en) 1995-04-19 1996-04-18 Vapour barrier for use in the heat insulation of buildings

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19514420 1995-04-19
DE19514420A DE19514420C1 (en) 1995-04-19 1995-04-19 Vapor barrier for use in the thermal insulation of buildings
PCT/DE1996/000705 WO1996033321A1 (en) 1995-04-19 1996-04-18 Vapour barrier for use in the heat insulation of buildings

Publications (2)

Publication Number Publication Date
EP0821755A1 EP0821755A1 (en) 1998-02-04
EP0821755B1 true EP0821755B1 (en) 2000-11-29

Family

ID=7759882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96909977A Expired - Lifetime EP0821755B1 (en) 1995-04-19 1996-04-18 Vapour barrier for use in the heat insulation of buildings

Country Status (25)

Country Link
EP (1) EP0821755B1 (en)
JP (1) JP4471403B2 (en)
KR (1) KR100417903B1 (en)
CN (1) CN1082122C (en)
AT (1) ATE197832T1 (en)
AU (1) AU695567B2 (en)
BR (1) BR9608141A (en)
CA (1) CA2215502C (en)
CZ (1) CZ292207B6 (en)
DE (2) DE19514420C1 (en)
DK (1) DK0821755T3 (en)
EA (1) EA000491B1 (en)
EE (1) EE03622B1 (en)
ES (1) ES2153958T3 (en)
HU (1) HU221558B (en)
MX (1) MX9707769A (en)
NO (1) NO308548B1 (en)
NZ (1) NZ305338A (en)
PL (1) PL188198B1 (en)
RO (1) RO116102B1 (en)
SI (1) SI0821755T1 (en)
SK (1) SK284896B6 (en)
TR (1) TR199701201T1 (en)
UA (1) UA28098C2 (en)
WO (1) WO1996033321A1 (en)

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DE102010055788A1 (en) 2010-12-23 2012-06-28 Hanno-Werk Gmbh & Co. Kg Joint sealing tape
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WO2005038330A1 (en) 2003-10-17 2005-04-28 Saint-Gobain Isover Insulation system for technical installations
CN100451429C (en) * 2003-10-17 2009-01-14 伊索沃圣戈班公司 Insulation system for technical installations
DE10349170A1 (en) * 2003-10-22 2005-05-19 Saint-Gobain Isover G+H Ag Steam brake with a shield against electromagnetic fields
DE102007052278A1 (en) 2007-11-02 2009-05-14 Saint-Gobain Isover G+H Ag Sealing device for laminar element e.g. wall, of building, has foil cut produced in construction foil, adhesive foil or adhesive tape, with which adjacent edge zones of element and component e.g. piping, are covered together
DE102007052278B4 (en) 2007-11-02 2021-08-26 Saint-Gobain Isover G+H Ag Method for sealing a component covered over a large area with a construction film, an adhesive film or an adhesive tape, as well as a cutting template for this and a system
DE102017105028B4 (en) 2016-03-24 2021-07-15 Coroplast Fritz Müller Gmbh & Co. Kg Plasterable tape and use

Also Published As

Publication number Publication date
KR100417903B1 (en) 2004-05-27
MX9707769A (en) 1998-06-30
DE19514420C1 (en) 1997-03-06
SI0821755T1 (en) 2001-06-30
EA199700245A1 (en) 1998-06-25
KR19980703897A (en) 1998-12-05
NO974807L (en) 1997-12-19
EE03622B1 (en) 2002-02-15
EE9700246A (en) 1998-04-15
CZ292207B6 (en) 2003-08-13
SK142097A3 (en) 1998-02-04
UA28098C2 (en) 2000-10-16
HUP9802610A2 (en) 1999-03-29
PL322730A1 (en) 1998-02-16
AU5331896A (en) 1996-11-07
CA2215502C (en) 2005-08-30
JP4471403B2 (en) 2010-06-02
CA2215502A1 (en) 1996-10-24
AU695567B2 (en) 1998-08-13
PL188198B1 (en) 2004-12-31
ATE197832T1 (en) 2000-12-15
RO116102B1 (en) 2000-10-30
NO974807D0 (en) 1997-10-17
EP0821755A1 (en) 1998-02-04
JPH11504088A (en) 1999-04-06
NO308548B1 (en) 2000-09-25
WO1996033321A1 (en) 1996-10-24
TR199701201T1 (en) 1998-02-21
CN1082122C (en) 2002-04-03
BR9608141A (en) 1999-02-09
HUP9802610A3 (en) 2000-01-28
SK284896B6 (en) 2006-02-02
HU221558B (en) 2002-11-28
ES2153958T3 (en) 2001-03-16
DE59606169D1 (en) 2001-01-04
CN1185821A (en) 1998-06-24
CZ321897A3 (en) 1998-02-18
NZ305338A (en) 1998-12-23
EA000491B1 (en) 1999-08-26
DK0821755T3 (en) 2001-03-05

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