EP1825072B1 - Vapor barrier for use in buildings - Google Patents

Vapor barrier for use in buildings Download PDF

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Publication number
EP1825072B1
EP1825072B1 EP05817534A EP05817534A EP1825072B1 EP 1825072 B1 EP1825072 B1 EP 1825072B1 EP 05817534 A EP05817534 A EP 05817534A EP 05817534 A EP05817534 A EP 05817534A EP 1825072 B1 EP1825072 B1 EP 1825072B1
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EP
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Prior art keywords
renovation
vapour barrier
vapor barrier
barrier according
vapor
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EP05817534A
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German (de)
French (fr)
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EP1825072A1 (en
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Jörn SCHRÖER
Norbert Klingelhage
Heinz Peter Raidt
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Ewald Doerken AG
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Ewald Doerken AG
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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

Definitions

  • the invention relates to a remedial vapor barrier for use in buildings, in particular for use in facades and / or renovation of building roofs, wherein the remedial vapor barrier a plastic film and a constant in the surface water vapor diffusion resistance, d, h. has a s d value.
  • Steam brakes are used, in particular, in the construction of new pitched roof constructions on a side of the roof construction facing the room, which i.a. from the rafters, preferably arranged between the rafters thermal barrier coating, arranged on the outer edges of the rafters underlay membrane and a roofing thereon arranged on the inner edges of the rafters and arranged on the disposed between the rafters thermal barrier coating.
  • the vapor barrier should prevent the ingress of moisture from the inside to the roof structure year round, since the moisture can lead to the formation of harmful condensation under the usually resting on the thermal insulation layer to achieve maximum thermal insulation underlay.
  • the vapor barrier is designed to be airtight.
  • the vapor barrier has an adapted diffusion resistance to water vapor to outside of the underlayment the formation of harmful condensation water, which u.a. to damage the insulation layer can lead to avoid.
  • the vapor barrier must be as open to diffusion as possible, at least in the area on the top of the rafters.
  • a vapor-permeable vapor barrier would in turn lead in the area between the rafters to an overall low diffusion resistance through the usually encountered inner lining of plastered Holzwollebachplatten or blankets that allow harmful dew formation in the heat insulation or below the underlays would.
  • the moisture-adaptive vapor barrier can not be used in areas above rooms with permanently high air humidity, since there the diffusion resistance occurring at the vapor barrier would constantly be too low.
  • Another redevelopment solution is the DE 201 20 812 disclosed. This provides that individual strips of a vapor barrier are laid parallel to the rafters, wherein each vapor-permeable and diffusion-tight vapor barriers are arranged alternately in such a way that the vapor-permeable strips lie on the rafters and envelop him and the diffusion-tight strips are disposed between the rafters and rest on the interior trim. To produce the airtight connection while adhesive strips are used.
  • a particular disadvantage of this solution is the difficult installation and the overall increased installation effort compared to a one-piece vapor barrier.
  • the diffusion-proof strips must each be adapted to the existing rafters distances, which can vary greatly for old buildings in particular.
  • a one-piece vapor barrier known, which is also laid parallel to the rafters and thereby has contiguous areas, each with deviating diffusion resistance.
  • a vapor barrier has the disadvantage that it is not adaptable to different rafter distances. A usability is usually only given in new buildings, where constant rafter distances are to be found.
  • vapor brakes for the renovation of old roofs with a constant s d value of at least 2 m are available on the market. These represent a compromise between the required water vapor impermeability in the rafter field and the water vapor permeability in the area of the rafters and can be laid without any problems.
  • An s d value of at least 2 m is given in the general state of the art as an absolute lower limit in order to avoid condensation on the underside of the underlayment.
  • the product "DELTA LUXX" from Ewald Dörken AG may be mentioned here.
  • the invention has for its object to provide a San istsdampfbremse with a constant in the surface water vapor resistance, which can be used in particular for the renovation of externally accessible building roofs and easy to install and a harmful condensation in the area above the vapor barrier and a harmful moisture content of the Rafter prevents.
  • the invention solves the problem by a remedial vapor barrier with the features of claim 1.
  • Advantageous developments of the remedial vapor barrier are given in the dependent claims 2-13.
  • Characteristic of the remedial vapor barrier according to the invention is that the constant water vapor diffusion resistance (s d value) of the remediation vapor brake assumes a value of 0.6-1.7 m. All s d values stated in the application refer to the DIN 52615 standard valid for their determination (boundary conditions: 23 ° C, 0/85% relative humidity).
  • the rehabilitation steam brake according to the invention thus allows a simple rehabilitation of pitched roofs, wherein the sanitation vapor barrier is guided in a simple manner looped over the rafters and the rafter field.
  • the sanitation vapor barrier according to the invention is not limited to use in the case of roof renovation, but can equally be used for the renovation of truss walls or for the construction of pitched roofs or even in wooden studs in the outer wall, in which case the advantage is that an accelerated dehydration of Moisture or new building moisture in the truss as well as new building moisture in the pitched roof is favored.
  • the renovation steam brake according to the invention can be produced particularly cost-effectively and thus contributes to the reduction of total rehabilitation costs when used as a rehabilitation steam brake.
  • the remedial steam brake has a constant s d value from the interval of 0.6-1.7 m.
  • the remedial vapor barrier has a constant s d value from the interval 0.8-1.6 m, in particular from the interval 1-1.5 m.
  • the remedial steam brake can in principle be made of any suitable material for this purpose and be formed in one or more layers.
  • the redevelopment vapor barrier can possibly also be formed by a reinforcing layer combined with the functional layer, which improves the mechanical properties of the redevelopment vapor barrier.
  • the s d value of the regeneration vapor barrier depends primarily on the material used for the production. However, the s d value can moreover be adapted in a simple manner, for example by the use of additives, such as suitable fillers or fibers, certain production methods, such as partial stretching or else by setting a suitable porosity. As materials, for example, special paper stocks, modified papers or the like can be used. However, the required porosity may also have purely fibrous structures, which may be nachkalandriert if necessary.
  • the remedial vapor barrier on a plastic film which is particularly simple and inexpensive with known methods can be produced.
  • the redevelopment vapor brake developed in this way can be extruded, for example, or produced by an extrusion coating.
  • the remedial steam brake can be produced by gluing individual layers, brushing on, for example, pastes, roll coating, spraying or calendering.
  • plastics it is possible to use those materials which make it possible to produce the renovation steam brake with the features according to the invention.
  • polyethylene copolymers, polycarbonate or polyvinyl chloride are suitable for the preparation.
  • the plastic film in the extrusion process of modified polyethylene particularly advantageously made of ethylene vinyl acetate copolymer.
  • the renovation steam brake according to the invention which can be supplied as a film, tarpaulin, fabric, non-woven or the like, particularly easy to lay.
  • the sanitation vapor barrier is flexible, foldable and / or rollable.
  • a supplementary facilitation of the laying of the remedial vapor barrier results according to a further advantageous embodiment of the invention, according to which the remedial vapor barrier is partially self-adhesive, in particular has a self-adhesive.
  • the connection to the rafters or an existing interior trim in the case of use as a remedial vapor barrier is particularly facilitated.
  • the connection of adjoining remedial vapor barriers in the overlapping area can be substantially simplified.
  • this can advantageously have a reinforcement, which is formed in particular from a grid, a woven fabric, a scrim, a knitted fabric and / or a nonwoven structure.
  • the reinforcement can also be formed by fibers or filaments embedded in the remediation vapor barrier. The reinforcement improves in a complementary way the tear and tear strength of the renovation vapor barrier and also prevents damage due to punctures. The reinforcement is embedded in the remediation vapor barrier.
  • the remedial vapor barrier may also be applied to a carrier layer, which is preferably formed from a woven fabric, a needle felt or a thermally bonded nonwoven.
  • a carrier layer which is preferably formed from a woven fabric, a needle felt or a thermally bonded nonwoven.
  • this can also fulfill functional properties and thus increase the range of application of the remedial vapor barrier in a complementary manner.
  • the remedial steam brake is advantageously carried out according to this embodiment of the invention by extruding the plastic film onto the selected carrier layer.
  • the remedial vapor barrier additives u.a. determining the color, the fire behavior and / or the aging resistance.
  • suitable stabilizers e.g., UV or thermal stabilizers
  • colorants and color pigments, flame retardants, and other fillers or fibers may be used.
  • the supply of additives according to this embodiment of the invention makes it possible to make an optimal adaptation of the sanitation vapor barrier to the intended use.
  • Fig. 1 shows a section of a cross section through a roof truss 1 with two adjacent rafters 2 and a rafter field lying between the rafters 2.
  • an inner lining 4 is arranged with an attached decorative layer 5 from an inner side of the roof truss, wherein the inner lining 4 directly adjacent to the rafters 2.
  • a San istsdampfbremse 3 looped over the outside and side surfaces of the rafters 2 and in the area of the rafter field on the outside of the inner lining 4 arranged for renovation purposes.
  • the remedial vapor barrier 3 consists of an extruded film with a basis weight of 52 g / m 2 and the following recipe: 89% ethylene-vinyl acetate copolymer with 28% vinyl acetate, 4% carbon black based on LDPE with 50% carbon black and 7% flame retardant based on of LDPE with 70% active substance (mixture of chloroparaffins and antimony trioxide).
  • the attachment of the Sanianssdampfbremse 3 takes place in the case of renovation of a roof of an old building after removing a roofing, not shown here and a possibly existing insulation.
  • the arrangement of the renovation vapor barrier 3 is carried out without destroying the existing interior trim. 4
  • the Sanianssdampfbremse 3 shown here has an s d value of 1.25 m, which ensures that at no time the moisture content due to water vapor diffusion in the rafters 2 increases over 18%, while it does not condense at the same time in the Thermal insulation 7 comes, which could lead to a significant reduction in the insulation performance of the insulation 7.
  • the remedial vapor barrier 3 can be produced by a coating having a weight per unit area of 21 g / m 2 , namely by partial bonding of a previously extruded film with a carrier fleece.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
  • Laminated Bodies (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Lubricants (AREA)
  • Braking Arrangements (AREA)

Abstract

A vapor barrier for use in buildings, in particular for use in facades and/or in the rehabilitation of building roofs, wherein the barrier has a water vapor diffusion resistance (sd factor) of 0.4 to 1.9 m diffusion-equivalent air layer thickness which is constant over the entire surface area.

Description

Die Erfindung betrifft eine Sanierungsdampfbremse zum Einsatz in Gebäuden, insbesondere zur Verwendung in Fassaden und/oder bei einer Sanierung von Gebäudedächern, wobei die Sanierungsdampfbremse eine Kunststofffolie und einen in der Fläche konstanten Wasserdampfdiffusionswiderstand, d, h. einen sd-Wert aufweist.The invention relates to a remedial vapor barrier for use in buildings, in particular for use in facades and / or renovation of building roofs, wherein the remedial vapor barrier a plastic film and a constant in the surface water vapor diffusion resistance, d, h. has a s d value.

Dampfbremsen werden insbesondere beim Neubau von Steildachkonstruktionen auf einer raumzugewandten Seite der Dachkonstruktion, die u.a. aus den Sparren, einer bevorzugt zwischen den Sparren angeordneten Wärmedämmschicht, einer auf den Außenkanten der Sparren angeordneten Unterspannbahn sowie einer darauf angeordneten Dacheindeckung besteht, auf den Innenkanten der Sparren und auf der zwischen den Sparren angeordneten Wärmedämmschicht angeordnet.Steam brakes are used, in particular, in the construction of new pitched roof constructions on a side of the roof construction facing the room, which i.a. from the rafters, preferably arranged between the rafters thermal barrier coating, arranged on the outer edges of the rafters underlay membrane and a roofing thereon arranged on the inner edges of the rafters and arranged on the disposed between the rafters thermal barrier coating.

Während die unterhalb der Dacheindeckung angeordnete Unterspannbahn, welche auf den Außenkanten der Sparren aufliegt, die Dachkonstruktion gegen äußere Einflüsse, insbesondere vor dem Eindringen schädlicher Feuchtigkeit von außen schützt, soll die Dampfbremse ganzjährig das Eindringen von Feuchtigkeit von Innen in die Dachkonstruktion verhindern, da die Feuchtigkeit zur Bildung von schädlichen Tauwasser unterhalb der in der Regel zur Erzielung einer maximalen Wärmedämmung auf der Wärmedämmschicht aufliegenden Unterspannbahn führen kann.While arranged below the roofing membrane underlay, which rests on the outer edges of the rafters, protects the roof construction against external influences, in particular against the ingress of harmful moisture from the outside, the vapor barrier should prevent the ingress of moisture from the inside to the roof structure year round, since the moisture can lead to the formation of harmful condensation under the usually resting on the thermal insulation layer to achieve maximum thermal insulation underlay.

Zur Vermeidung eines Feuchtetransports über Konvektion ist die Dampfbremsedazu luftdicht ausgebildet. Zudem weist die Dampfbremse einen angepassten Diffusionswiderstand gegenüber Wasserdampf auf, um außen unter der Unterspannbahn die Bildung des schädlichen Tauwassers, welches u.a. zur Beschädigung der Dämmschicht führen kann, zu vermeiden.To avoid moisture transport via convection, the vapor barrier is designed to be airtight. In addition, the vapor barrier has an adapted diffusion resistance to water vapor to outside of the underlayment the formation of harmful condensation water, which u.a. to damage the insulation layer can lead to avoid.

Bei Neubaudächern können Dampfbremsen der eingangs genannten Art in einfacher Weise flächig auf den Unterseiten der das Steildach bildenden Sparren angebracht sowie an den Rändern und dem Überlappungsbereich luftdicht angeschlossen werden. Bei den Sanierungen bestehender Gebäudedächer, die üblicherweise durch die Notwendigkeit der Erneuerung der Dacheindeckung ausgelöst werden, wird sinnvoller Weise auch die Wärmedäm-mung sowie die Unterspannbahn und die Dampfbremse erneuert, da die zu sanierenden Gebäude üblicherweise nicht die nunmehr gültigen aktuellen Baubestimmungen erfüllen. Hierbei ergibt sich jedoch das Problem, dass in der Regel die Innenraumverkleidung der im Steildach vorhandenen Räume erhalten bleiben soll. Somit besteht nur die Möglichkeit, eine Dampfbremse von der Außenseite des Steildachs aus anzuordnen.In Neubaudächern vapor brakes of the type mentioned in a simple manner can be mounted flat on the undersides of the pitched rafters and formed on the Edges and the overlap area airtight. In the renovation of existing building roofs, which are usually triggered by the need to renew the roofing, it makes sense, the thermal insulation as well as the underlayment and the vapor barrier renewed because the buildings to be renovated usually do not meet the current valid building regulations. However, this results in the problem that as a rule the interior lining of existing in the pitched roof rooms should be preserved. Thus, it is only possible to arrange a vapor barrier from the outside of the pitched roof.

Um im Sanierungsfall die Dampfbremse jedoch lückenlos und damit luftdicht verlegen zu können, muss sie nach dem Entfernen der Dacheindeckung und einer ggf. vorhandenen alten Wärmedämmung zwischen den Sparren schlaufenförmig über die Sparren hinweggeführt werden, da ein luftdichter Anschluss einzelner Streifen der Dampfbremse seitlich am Sparren nicht zuverlässig möglich ist.However, in order to be able to lay the vapor barrier completely and thus airtight in the case of refurbishment, it must be looped over the rafters between the rafters after removal of the roof covering and any existing thermal insulation, since an air-tight connection of individual strips of the vapor barrier does not occur laterally on the rafter reliable is possible.

Beim schlaufenförmigen Verlegen der Dampfbremse verläuft diese dann, im Querschnitt betrachtet, seitlich am Sparren hinunter bis auf die Rückseite der zu erhaltenen Innenraumverkleidung, dann auf dieser aufliegend weiter bis zum nächsten Sparren und anschließend wiederum aufwärts über die Oberseite des Sparrens hinweg und schließlich wieder hinunter bis zum nächsten Sparrenfeld.When looping the vapor barrier this then runs, viewed in cross section, the rafter on the side down to the back of the interior trim to be obtained, then on this lying on until the next rafter and then turn up over the top of the rafter and finally back down to to the next rafter field.

Dieses Verlegeverfahren weist jedoch den Nachteil auf, dass insbesondere im Winter unter den außen über die Sparren geführten herkömmlichen Dampfbremsen Kondenswasser entsteht, da diese einen hohen Diffusionswiderstand, wie sie im Neubau üblicherweise verwendet werden, aufweisen. Zur Sanierung von Steildächern in der oben beschriebenen Weise sind diese Dampfbremsen jedoch ungeeignet, da es bei einer nicht ausreichenden Feuchtigkeitsabführung zu einer Feuchtigkeitsanlagerung im Sparren und einer damit möglicherweise einhergehenden Schimmelbildung kommen kann.However, this laying method has the disadvantage that, especially in the winter under the outside guided over the rafters conventional vapor brakes condensate, since they have a high diffusion resistance, as they are commonly used in new construction. For the renovation of pitched roofs in the manner described above, however, these vapor barriers are unsuitable, since it can lead to a moisture accumulation in the rafter and thus possibly associated mold growth in an insufficient moisture removal.

Um diesem vorzubeugen muss die Dampfbremse zumindest in dem Bereich auf der Oberseite der Sparren möglichst diffusionsoffen sein. Eine solche diffusionsoffene Dampfsperre würde jedoch wiederum im Bereich des Sparrenfeldes, d.h. im Bereich zwischen den Sparren, zu einem insgesamt zu geringen Diffusionswiderstand durch die üblicherweise anzutreffende Innenverkleidung aus überputzten Holzwolleleichtbauplatten oder Leistendecken führen, der eine schädliche Tauwasserbildung im Bereich der Wärmedämmung oder unterhalb der Unterspannbahn zulassen würde.To prevent this, the vapor barrier must be as open to diffusion as possible, at least in the area on the top of the rafters. However, such a vapor-permeable vapor barrier would in turn lead in the area between the rafters to an overall low diffusion resistance through the usually encountered inner lining of plastered Holzwolleleichtbauplatten or blankets that allow harmful dew formation in the heat insulation or below the underlays would.

Zur Lösung dieses Problems ist aus dem Stand der Technik gemäß der EP 0 821 755 bereits eine Dampfbremse bekannt, deren sd-Wert sich infolge einer Wasseraufnahme und - abgabe verändert. Bei Entstehung von Kondenswasser an der Oberfläche der Dampfbremse verändert sich die Molekülstrukture, so dass der sd-Wert auf ein Maß von bis zu 0,2 m äquivalente Luftschichtdicke absinkt- Die unter der Dampfbremse angefallene Kondenswassermenge kann im Laufe der Zeit und bei äußerer Erwärmung durch die nun dampfdurchlässigere Folie entweichen.To solve this problem is known from the prior art according to EP 0 821 755 already known a vapor barrier whose s d value changed as a result of water absorption and - release. When condensation forms on the surface of the vapor barrier, the molecular structure changes, so that the s d value drops to an air layer thickness equivalent to 0.2 m. The amount of condensate that accumulates under the vapor barrier can increase with time and with external heating escape through the now more vapor permeable film.

Diese feuchteadaptive Dampfbremse, wie sie ferne rauch aus der DE-A-102 31769 bekannt ist, weist jedoch den Nachteil auf, dass funktionsbedingt über einen gewissen Zeitraum die Holzfeuchte über den kritischen Wert von 18 % steigen kann, bei der Schimmelpilzwachstum zu erwarten ist. Überdies ist der zur Herstellung derartiger Dampfbremsen oder eines aus der DE-A-102 38 98 bekannten Abdichtungsbands, bei dem die durch einen feuchteadaptiven Kunststoff gebildete mittlere Schicht einen von der relativen Luftfeuchtigkeit abhängigen sd-Wert von 0,1-10 m aufweist, erforderliche Rohstoff Polyamid sowie vergleichbare Rohstoffe die die geforderten Eigenschaften aufweisen besonders teuer. Zur Herstellung einer Dampfbremse mit den in der EP 0 821 755 angegebenen Werten, müssen beispielsweise 60 g/m2 des teuren Polyamid 6 verwendet werden.This moisture-adaptive vapor retarder, as it far away from the smoke DE-A-102 31769 is known, but has the disadvantage that due to the function over a certain period of time, the wood moisture can rise above the critical value of 18%, is to be expected in the mold growth. Moreover, for producing such vapor brakes or one of the DE-A-102 38 98 known sealing tape in which the formed by a moisture-adaptive plastic middle layer has a dependent on the relative humidity s d value of 0.1-10 m, required raw material polyamide and comparable raw materials having the required properties are particularly expensive. For producing a vapor barrier with in the EP 0 821 755 given values, for example, 60 g / m 2 of the expensive polyamide 6 must be used.

Darüberhinaus treten während der Feuchteauf- und -abgabe durch die feuchte adaptive Dampfbremse erhebliche Breiten- und Längenänderungen der Dampfbremse auf, die in Abhängigkeit vom Zustand der Dampfbremse während des Einbaus zu einer Faltenbildung mit möglichen Undichtigkeiten im Bereich von Überlappungen und Anschlüssen oder zu einer Schrumpfung der Dampfbremse führen kann, wodurch diese im Extremfall, insbesondere in Verbindung der Dampfbremse mit einer inkompressiblen Wärmedämmung, zerstört wird. Die Schrumpfung der Dampfbremse führt bei der Verwendung einer kompressiblen Wärmedämmung jedoch in jedem Fall zur Entstehung von wärmebrücken, die durch die sich bildenden Freiräume entstehen, in denen die Luft zirkulieren kann.In addition, occur during the moisture on and off by the wet adaptive vapor brake considerable changes in width and length of the vapor barrier, depending on the state of the vapor barrier during installation to wrinkling with possible leaks in the area of overlaps and connections or to a shrinkage of the Steam brake can cause, whereby this is destroyed in extreme cases, especially in conjunction with the vapor barrier with an incompressible thermal insulation. The shrinkage of the vapor barrier, however, when using a compressible thermal insulation in any case leads to the formation of thermal bridges, which arise through the forming free spaces in which the air can circulate.

Die feuchteadaptive Dampfbremse lässt sich zudem nicht in Bereichen oberhalb von Räumen mit dauerhaft hoher Luftfeuchtigkeit einsetzen, da dort der sich an der Dampfbremse einstellende Diffusionswiderstand konstant zu niedrig wäre.In addition, the moisture-adaptive vapor barrier can not be used in areas above rooms with permanently high air humidity, since there the diffusion resistance occurring at the vapor barrier would constantly be too low.

Eine weitere Sanierungslösung wird durch die DE 201 20 812 offenbart. Diese sieht vor, dass einzelne Streifen einer Dampfbremse parallel zu den Sparren verlegt werden, wobei jeweils diffusionsoffene und diffusionsdichte Dampfbremsen im Wechsel angeordnet werden und zwar derart, dass die diffusionsoffenen Streifen auf dem Sparren liegen und ihn umhüllen und die diffusionsdichten Streifen zwischen den Sparren angeordnet sind und auf der Innenraumverkleidung aufliegen. Zur Herstellung der luftdichten Verbindung werden dabei Klebestreifen eingesetzt. Ein besonderer Nachteil dieser Lösung besteht in der schwierigen Verlegung und dem insgesamt erhöhten Verlegeaufwand gegenüber einer einteiligen Dampfbremse. Darüberhinaus müssen die diffusionsdichten Streifen jeweils an die vorhandenen Sparrenabstände angepasst werden, die insbesondere bei Altbauten stark voneinander abweichen können.Another redevelopment solution is the DE 201 20 812 disclosed. This provides that individual strips of a vapor barrier are laid parallel to the rafters, wherein each vapor-permeable and diffusion-tight vapor barriers are arranged alternately in such a way that the vapor-permeable strips lie on the rafters and envelop him and the diffusion-tight strips are disposed between the rafters and rest on the interior trim. To produce the airtight connection while adhesive strips are used. A particular disadvantage of this solution is the difficult installation and the overall increased installation effort compared to a one-piece vapor barrier. In addition, the diffusion-proof strips must each be adapted to the existing rafters distances, which can vary greatly for old buildings in particular.

Überdies ist aus der DE 196 51 843 eine einteilige Dampfbremse bekannt, die ebenfalls parallel zu den Sparren verlegt wird und dabei zusammenhängende Bereiche mit jeweils abweichendem Diffusionswiderstand aufweist. Eine derartige Dampfbremse weist jedoch den Nachteil auf, dass sie nicht an unterschiedliche Sparrenabstände anpassbar ist. Eine Einsetzbarkeit ist dabei in der Regel nur im Neubau gegeben, wo konstante Sparrenabstände vorzufinden sind.Moreover, from the DE 196 51 843 a one-piece vapor barrier known, which is also laid parallel to the rafters and thereby has contiguous areas, each with deviating diffusion resistance. However, such a vapor barrier has the disadvantage that it is not adaptable to different rafter distances. A usability is usually only given in new buildings, where constant rafter distances are to be found.

Auf dem Markt sind ferner Dampfbremsen für die Sanierung von Altbaudächern erhältlich, die einen konstanten sd-Wert von mindestens 2 m aufweisen. Diese stellen einen Kompromiss zwischen der geforderten Wasserdampfundurchlässigkeit im Sparrenfeld und der Wasserdampfdurchlässigkeit im Bereich der Sparren dar und lassen sich problemlos verlegen. Ein sd-Wert von mindestens 2 m wird dabei im allgemeinen Stand der Technik als absolute Untergrenze angegeben, um eine Tauwasserbildung an der Unterseite der Unterspannbahn zu vermeiden. Als Beispiel für am Markt erhältliche Dampfbremsen mit einem sd-Wert von 2m sei hier das Produkt "DELTA LUXX" der Ewald Dörken AG genannt.In addition, vapor brakes for the renovation of old roofs with a constant s d value of at least 2 m are available on the market. These represent a compromise between the required water vapor impermeability in the rafter field and the water vapor permeability in the area of the rafters and can be laid without any problems. An s d value of at least 2 m is given in the general state of the art as an absolute lower limit in order to avoid condensation on the underside of the underlayment. As an example of vapor brakes available on the market with an s d value of 2 m, the product "DELTA LUXX" from Ewald Dörken AG may be mentioned here.

Der Nachteil dieser Lösung besteht jedoch darin, dass der Grenzwert von 18% Holzfeuchte in der Regel überschritten wird, so dass es zu einer Schimmelbildung kommen kann. Insbesondere bei einer geringen Höhe der Sparren, wie dies häufig im Altbau vorzufinden ist, besteht ein besonders hohes Risiko, dass die 18% Holzfeuchte länger andauernd überschritten werden. Dies resultiert daraus, dass das Holz an sich bereits einen Widerstand gegenüber dem Dampfdruck bietet. Bei einer nur geringen Sparrenhöhe ist dieser Widerstand erheblich geringer und somit kommt es zu einer erheblichen Holzfeuchte.The disadvantage of this solution, however, is that the limit of 18% wood moisture is usually exceeded, so that it can lead to mold growth. In particular, with a low height of the rafters, as is often found in old buildings, there is a particularly high risk that the 18% wood moisture content are exceeded permanently. This results from the fact that the wood itself already offers resistance to the vapor pressure. With only a small rafter height, this resistance is considerably lower and thus there is a considerable amount of wood moisture.

Der Erfindung liegt die Aufgabe zugrunde, eine Sanierungsdampfbremse mit einem in der Fläche konstanten Wasserdampfdiffusionswiderstand bereitzustellen, die sich insbesondere zur Sanierung von nur von außen zugänglichen Gebäudedächern verwenden lässt und leicht zu verlegen ist sowie einer schädlichen Tauwasserbildung im Bereich oberhalb der Dampfbremse sowie einer schädlichen Holzfeuchte der Sparren vorbeugt.The invention has for its object to provide a Sanierungsdampfbremse with a constant in the surface water vapor resistance, which can be used in particular for the renovation of externally accessible building roofs and easy to install and a harmful condensation in the area above the vapor barrier and a harmful moisture content of the Rafter prevents.

Die Erfindung löst die Aufgabe durch eine Sanierungsdampfbremse mit den Merkmalen des Anspruchs 1. Vorteilhafte Weiterbildungen der Sanierungsdampfbremse sind in den Unteransprüchen 2-13 wiedergegeben.The invention solves the problem by a remedial vapor barrier with the features of claim 1. Advantageous developments of the remedial vapor barrier are given in the dependent claims 2-13.

Kennzeichnend für die erfindungsgemäße Sanierungsdampfbremse ist, dass der konstante Wasserdampfdiffusionswiderstand (sd-Wert) der Sanierungsdampfbremse einen Wert von 0,6-1,7 m annimmt. Alle im Rahmen der Anmeldung angegebenen sd-Werte beziehen sich dabei auf die zu deren Bestimmung gültige DIN 52615 (Randbedingungen: 23°C, 0/85% rel. Feuchte).Characteristic of the remedial vapor barrier according to the invention is that the constant water vapor diffusion resistance (s d value) of the remediation vapor brake assumes a value of 0.6-1.7 m. All s d values stated in the application refer to the DIN 52615 standard valid for their determination (boundary conditions: 23 ° C, 0/85% relative humidity).

Es hat sich gezeigt, dass überraschenderweise bei sd-Werten in diesen Bereichen sowohl bei erhöhter Anfangsfeuchte von Bauholz oder Raumluft bei konstant hoher Luftfeuchte von 60% sich zu keinem Zeitpunkt eine Holzfeuchte einstellt, die zu einer Schädigung des Sparren führt. Insbesondere wird der für die Schimmelbildung kritische Wert von 18% Holzfeuchte in der Regel nicht mehr überschritten. Somit lässt sich kostengünstig eine Sanierungsdampfbremse bereitstellen, mit der wirksam eine Schädigung der Dachkonstruktion, d.h. sowohl der Sparren als auch der Wärmedämmschicht vermieden wird.It has been found that surprisingly at s d values in these areas both at elevated initial moisture content of lumber or room air at a constant high air humidity of 60% at no time adjusts a wood moisture, which leads to damage to the rafters. In particular, the value of 18% wood moisture critical for mold formation is generally no longer exceeded. Thus, a renovation vapor barrier can be provided at low cost, effectively avoiding damage to the roof construction, ie both the rafters and the thermal barrier coating.

Die erfindungsgemäße Sanierungsdampfbremse erlaubt somit eine einfache Sanierung von Steildächern, wobei die Sanierungsdampfbremse in einfacher Weise schlaufenartig über die Sparren und das Sparrenfeld geführt wird. Die erfindungsgemäße Sanierungsdampfbremse ist jedoch nicht auf den Einsatz für den Fall der Dachsanierung beschränkt, sondern lässt sich gleichermaßen auch für die Sanierung von Fachwerkwänden oder auch für den Neubau von Steildächern oder auch bei Holzständerwerken in der Außenwand verwenden, wobei hierbei der Vorteil darin liegt, dass eine beschleunigte Austrocknung von eingedrungener Feuchte oder Neubaufeuchte im Fachwerk sowie von Neubaufeuchte im Steildach begünstigt wird.The rehabilitation steam brake according to the invention thus allows a simple rehabilitation of pitched roofs, wherein the sanitation vapor barrier is guided in a simple manner looped over the rafters and the rafter field. However, the sanitation vapor barrier according to the invention is not limited to use in the case of roof renovation, but can equally be used for the renovation of truss walls or for the construction of pitched roofs or even in wooden studs in the outer wall, in which case the advantage is that an accelerated dehydration of Moisture or new building moisture in the truss as well as new building moisture in the pitched roof is favored.

Die erfindungsgemäße Sanierungsdampfbremse lässt sich besonders kostengünstig herstellen und trägt damit beim Einsatz als Sanierungsdampfbremse zur Reduzierung der insgesamt auftretenden Sanierungskosten bei. Gemäß der Erfindung weist die Sanierungsdampfbremse einen konstanten sd-Wert aus dem Intervall von 0,6-1,7 m auf. Vorteilhafterweise weist die Sanierungsdampfbremse einen konstanten sd-Wert aus dem Intervall 0,8-1,6 m, insbesondere aus dem Intervall 1-1,5 m auf. Diese Bereiche gewährleisten im Falle der Verwendung als Sanierungsdampfbremse in besonders zuverlässiger Weise eine ausreichende Wasserdampfdurchlässigkeit im Bereich der Sparren, so dass gewährleistet ist, dass die Holzfeuchte niemals über den kritischen Wert von 18% steigt. Gleichzeitig ist der Diffusionswiderstand der Dampfsperre im Bereich des Sparrenfeldes derart hoch, dass es nicht zu einer Tauwasserbildung innerhalb der Dachkonstruktion, insbesondere an der Unterseite einer am Steildach anzuordnenden Unterspannbahn kommt.The renovation steam brake according to the invention can be produced particularly cost-effectively and thus contributes to the reduction of total rehabilitation costs when used as a rehabilitation steam brake. According to the invention, the remedial steam brake has a constant s d value from the interval of 0.6-1.7 m. Advantageously, the remedial vapor barrier has a constant s d value from the interval 0.8-1.6 m, in particular from the interval 1-1.5 m. These areas ensure in the case of use as a remedial steam brake in a particularly reliable manner sufficient water vapor permeability in the rafters, so that it is ensured that the wood moisture never rises above the critical value of 18%. At the same time, the diffusion resistance of the vapor barrier in the region of the rafter field is so high that condensation does not occur within the roof construction, in particular on the underside of a roofing membrane to be arranged on the pitched roof.

Die Sanierungsdampfbremse kann grundsätzlich aus jedem beliebigen, hierfür geeigneten Material hergestellt werden und dabei ein- oder mehrlagig ausgebildet sein. Neben einer grundsätzlich vorhandenen Funktionsschicht, die bereits alleine die Sanierungsdampfbremse bilden kann, kann die Sanierungsdampfbremse dabei ggf. auch durch eine mit der Funktionsschicht kombinierte Verstärkungsschicht gebildet werden, welche die mechanischen Eigenschaften der Sanierungsdampfbremse verbessert. Alternativ besteht jedoch auch die Möglichkeit, die Verstärkung in die Funktionsschicht einzubetten, wobei sowohl die Verstärkungsschicht als auch die eingebetteten Verstärkungen zur Einstellung des sd-Wertes der Sanierungsdampfbremse verwendet werden können.The remedial steam brake can in principle be made of any suitable material for this purpose and be formed in one or more layers. In addition to a basically existing functional layer, which alone can form the redevelopment vapor barrier, the redevelopment vapor barrier can possibly also be formed by a reinforcing layer combined with the functional layer, which improves the mechanical properties of the redevelopment vapor barrier. Alternatively, however, it is also possible to embed the reinforcement in the functional layer, wherein both the reinforcing layer and the embedded reinforcements can be used to adjust the s d value of the remedial vapor barrier.

Der sd-Wert der Sanierungsdampfbremse hängt in erster Linie von dem zur Herstellung verwendeten Material ab. Der sd-Wert kann aber darüber hinaus, bspw. durch die Verwendung von Zusätzen, wie geeignete Füllstoffe oder Fasern, bestimmte Herstellungsverfahren, wie ein teilweises Verstrecken oder auch durch die Einstellung einer geeigneten Porosität, in einfacher Weise angepasst werden. Als Materialien sind beispielsweise spezielle Papierstoffe, modifizierte Papiere oder dergleichen verwendbar. Die erforderliche Porösität können jedoch auch rein faserige Gebilde aufweisen, die ggf. nachkalandriert werden können.The s d value of the regeneration vapor barrier depends primarily on the material used for the production. However, the s d value can moreover be adapted in a simple manner, for example by the use of additives, such as suitable fillers or fibers, certain production methods, such as partial stretching or else by setting a suitable porosity. As materials, for example, special paper stocks, modified papers or the like can be used. However, the required porosity may also have purely fibrous structures, which may be nachkalandriert if necessary.

Nach einer vorteilhaften Ausgestaltung der Erfindung weist die Sanierungsdampfbremse jedoch eine Kunststofffolie auf, die sich mit bekannten Verfahren besonders einfach und kostengünstig herstellen lässt. Die derart weitergebildete Sanierungsdampfbremse lässt sich bspw. extrudieren oder durch eine Extrusionsbeschichtung herstellen. Darüber hinaus lässt sich die Sanierungsdampfbremse durch ein Verkleben von Einzellagen, Aufstreichen, bspw. von Pasten, Walzenbeschichtung, Sprühen oder Kalandrieren herstellen.According to an advantageous embodiment of the invention, however, the remedial vapor barrier on a plastic film, which is particularly simple and inexpensive with known methods can be produced. The redevelopment vapor brake developed in this way can be extruded, for example, or produced by an extrusion coating. In addition, the remedial steam brake can be produced by gluing individual layers, brushing on, for example, pastes, roll coating, spraying or calendering.

Als Kunststoffe können dabei solche Materialien verwendet werden, die die Herstellung der Sanierungsdampfbremse mit den erfindungsgemäßen Merkmalen ermöglichen. Zur Herstellung eignen sich beispielsweise Polyethylen Copolymere, Polycarbonat oder Polyvinylchlorid.
Nach einer weiteren Ausgestaltung der Erfindung ist die Kunststoffolie im Extrusionsverfahren aus modifizierten Polyethylen, besonders vorteilhafterweise aus Ethylen Vinylacetat Copolymer hergestellt. Diese Materialien ermöglichen eine besonders kostengünstige Herstellung der Sanierungsdampfbremse die zugleich besonders widerstandsfähig gegenüber äußeren Einflüssen ist.As plastics, it is possible to use those materials which make it possible to produce the renovation steam brake with the features according to the invention. For example, polyethylene copolymers, polycarbonate or polyvinyl chloride are suitable for the preparation.
According to a further embodiment of the invention, the plastic film in the extrusion process of modified polyethylene, particularly advantageously made of ethylene vinyl acetate copolymer. These materials allow a particularly cost-effective production of the renovation vapor barrier which is also particularly resistant to external influences.

Im Anwendungsfall lässt sich die erfindungsgemäße Sanierungsdampfbremse, die als Folie, Plane, Gewebe, Vlies oder dgl. geliefert werden kann, besonders einfach verlegen. Dies wird durch eine vorteilhafte Ausgestaltung der Erfindung, wonach die Sanierungsdampfbremse flexibel, faltbar und/oder aufrollbar ist, in ergänzender Weise verbessert. Eine ergänzende Erleichterung der Verlegung der Sanierungsdampfbremse ergibt sich nach einer weiteren vorteilhaften Weiterbildung der Erfindung, wonach die Sanierungsdampfbremse abschnittsweise selbstklebend ist, insbesondere einen Selbstkleberand aufweist. Hierdurch wird die Anbindung an die Sparren oder eine bestehende Innenverkleidung im Falle des Einsatzes als Sanierungsdampfbremse besonders erleichtert. Zudem kann der Anschluss aneinander angrenzender Sanierungsdampfbremsen im Überlappungsbereich wesentlich vereinfacht werden.In the application, the renovation steam brake according to the invention, which can be supplied as a film, tarpaulin, fabric, non-woven or the like, particularly easy to lay. This is improved in a complementary manner by an advantageous embodiment of the invention, according to which the sanitation vapor barrier is flexible, foldable and / or rollable. A supplementary facilitation of the laying of the remedial vapor barrier results according to a further advantageous embodiment of the invention, according to which the remedial vapor barrier is partially self-adhesive, in particular has a self-adhesive. As a result, the connection to the rafters or an existing interior trim in the case of use as a remedial vapor barrier is particularly facilitated. In addition, the connection of adjoining remedial vapor barriers in the overlapping area can be substantially simplified.

Zur Verbesserung der Widerstandsfähigkeit der Sanierungsdampfbremse kann diese vorteilhafterweise eine Verstärkung aufweisen, die insbesondere aus einem Gitter, einem Gewebe, einem Gelege, einem Gewirke und/oder einer Vliesstruktur gebildet ist. Darüber hinaus kann die Verstärkung auch durch in die Sanierungsdampfbremse eingebettet Fasern oder Filamente gebildet werden. Die Verstärkung verbessert dabei in ergänzenderweise die Reiß- und Weiterreißfestigkeit der Sanierungsdampfbremse und beugt zudem Beschädigungen infolge von Durchstoßungen vor. Die Verstärkung ist dabei in die Sanierungsdampfbremse eingebettet.To improve the resistance of the reductive vapor barrier, this can advantageously have a reinforcement, which is formed in particular from a grid, a woven fabric, a scrim, a knitted fabric and / or a nonwoven structure. In addition, the reinforcement can also be formed by fibers or filaments embedded in the remediation vapor barrier. The reinforcement improves in a complementary way the tear and tear strength of the renovation vapor barrier and also prevents damage due to punctures. The reinforcement is embedded in the remediation vapor barrier.

Gemäß einer weiteren Ausgestaltung der Erfindung kann die Sanierungsdampfbremse jedoch auch auf eine Trägerschicht aufgebracht sein, welche vorzugsweise aus einem Gewebe, einem Nadelvlies oder einem thermoverfestigtem Vlies gebildet ist. Neben der mechanischen Verstärkung der Sanierungsdampfbremse durch die Trägerschicht kann diese zudem funktionelle Eigenschaften erfüllen und so den Einsatzbereich der Sanierungsdampfbremse in ergänzenderweise steigern. Die Sanierungsdampfbremse wird gemäß dieser Weiterbildung der Erfindung vorteilhafterweise durch das Aufextrudieren der Kunststofffolie auf die gewählte Trägerschicht durchgerührt.According to a further embodiment of the invention, however, the remedial vapor barrier may also be applied to a carrier layer, which is preferably formed from a woven fabric, a needle felt or a thermally bonded nonwoven. In addition to the mechanical reinforcement of the remedial vapor barrier by the carrier layer, this can also fulfill functional properties and thus increase the range of application of the remedial vapor barrier in a complementary manner. The remedial steam brake is advantageously carried out according to this embodiment of the invention by extruding the plastic film onto the selected carrier layer.

Nach einer weiteren Ausgestaltung der Erfindung weist die Sanierungsdampfbremse Additive, u.a. zur Festlegung der Farbe, des Brandverhaltens und/oder der Alterungsbeständigkeit auf. Hierzu können bspw. geeignete Stabilisatoren (z.B. UV- oder Thermostabilisatoren), Farbmittel und Farbpigmente, Flammhemmer und weitere Füllstoffe oder -fasern verwendet werden. Die Zuführung von Additiven gemäß dieser Weiterbildung der Erfindung ermöglicht es, eine optimale Anpassung der Sanierungsdampfbremse an den vorgesehenen Einsatzzweck vorzunehmen.According to a further embodiment of the invention, the remedial vapor barrier additives, u.a. determining the color, the fire behavior and / or the aging resistance. For example, suitable stabilizers (e.g., UV or thermal stabilizers), colorants and color pigments, flame retardants, and other fillers or fibers may be used. The supply of additives according to this embodiment of the invention makes it possible to make an optimal adaptation of the sanitation vapor barrier to the intended use.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnungen erläutert. In den Zeichnungen zeigen:

Fig. 1
einen Querschnitt durch einen Dachstuhl mit einer über zwei Sparren und angrenzende Sparrenfelder verlaufenden Sanierungsdampfbremse und
Fig. 2
einen Querschnitt durch den Dachstuhl von Fig. 1 mit eingebrachter Dämmung und einer darauf angeordneten Unterspannbahn.
Hereinafter, an embodiment of the invention will be explained with reference to the drawings. In the drawings show:
Fig. 1
a cross section through a roof with a running over two rafters and adjacent rafter fields Sanierungsdampfbremse and
Fig. 2
a cross section through the roof of Fig. 1 with installed insulation and an underlay thereon.

Fig. 1 zeigt einen Ausschnitt eines Querschnitts durch einen Dachstuhl 1 mit zwei nebeneinander liegenden Sparren 2 und einem zwischen den Sparren 2 liegenden Sparrenfeld. Auf den Sparren 2 ist von einer Innenseite des Dachstuhls eine Innenverkleidung 4 mit einer darauf angebrachten Dekorschicht 5 angeordnet, wobei die Innenverkleidung 4 direkt an die Sparren 2 angrenzt. Über die Sparren 2 sowie auf der den Sparren 2 zugewandten Außenseiten der Innenverkleidung 4 ist zu Sanierungszwecken eine Sanierungsdampfbremse 3 schlaufenförmig über die Außenseite und Seitenflächen der Sparren 2 sowie im Bereich des Sparrenfeldes flächig auf der Außenseite der Innenverkleidung 4 angeordnet. Fig. 1 shows a section of a cross section through a roof truss 1 with two adjacent rafters 2 and a rafter field lying between the rafters 2. On the rafters 2, an inner lining 4 is arranged with an attached decorative layer 5 from an inner side of the roof truss, wherein the inner lining 4 directly adjacent to the rafters 2. About the rafters 2 and on the rafters 2 facing outer sides of the inner lining 4 is a Sanierungsdampfbremse 3 looped over the outside and side surfaces of the rafters 2 and in the area of the rafter field on the outside of the inner lining 4 arranged for renovation purposes.

Die Sanierungsdampfbremse 3 besteht aus einer extrudierten Folie mit einem Flächengewicht von 52 g/m2 und folgender Rezeptur: 89% Ethylen-Vinylacetat-Copolymer mit 28% Vinylacetatanteil, 4% Rußfarbbatch auf Basis von LDPE mit 50% Rußanteil und 7% Flammhemmerbatch auf Basis von LDPE mit 70% aktiver Substanz (Mischung aus Chlorparaffinen und Antimontrioxid).The remedial vapor barrier 3 consists of an extruded film with a basis weight of 52 g / m 2 and the following recipe: 89% ethylene-vinyl acetate copolymer with 28% vinyl acetate, 4% carbon black based on LDPE with 50% carbon black and 7% flame retardant based on of LDPE with 70% active substance (mixture of chloroparaffins and antimony trioxide).

Die Anbringung der Sanierungsdampfbremse 3 erfolgt im Falle der Sanierung eines Dachs eines Altbaus nach Entfernen einer hier nicht dargestellten Dacheindeckung und einer möglicherweise vorhandenen Dämmung. Die Anordnung der Sanierungsdampfbremse 3 erfolgt dabei ohne Zerstörung der vorhandenen Innenraumverkleidung 4.The attachment of the Sanierungsdampfbremse 3 takes place in the case of renovation of a roof of an old building after removing a roofing, not shown here and a possibly existing insulation. The arrangement of the renovation vapor barrier 3 is carried out without destroying the existing interior trim. 4

Im weiteren Verlauf der Sanierungsarbeiten werden, wie aus Fig. 2 ersichtlich, in die Sparrenfelder eine Dämmung 7 sowie auf die Außenseite der Sparren eine Unterspannbahn 6 aufgebracht, auf die anschließend eine hier nicht dargestellte Dacheindeckung aufgebracht werden kann.In the further course of the renovation work, as out Fig. 2 it can be seen in the rafter fields an insulation 7 and applied to the outside of the rafters a roofing membrane 6, on which then a roofing, not shown here can be applied.

Die hier dargestellte Sanierungsdampfbremse 3 weist einen sd-Wert von 1,25 m auf, die gewährleistet, dass zu keinem Zeitpunkt die Holzfeuchte infolge von Wasserdampfdiffusionen im Bereich der Sparren 2 über 18% steigt, wobei es gleichzeitig nicht zu einer Tauwasserbildung im Bereich der Wärmedämmung 7 kommt, die zu einer erheblichen Herabsetzung der Dämmleistung der Wärmedämmung 7 führen könnte.The Sanierungsdampfbremse 3 shown here has an s d value of 1.25 m, which ensures that at no time the moisture content due to water vapor diffusion in the rafters 2 increases over 18%, while it does not condense at the same time in the Thermal insulation 7 comes, which could lead to a significant reduction in the insulation performance of the insulation 7.

Die Sanierungsdampfbremse 3 kann durch eine Beschichtung mit einem Flächengewicht von 21 g/m2, nämlich durch partielles Verkleben einer zuvor extrudierten Folie mit einem Trägervlies, hergestellt werden.The remedial vapor barrier 3 can be produced by a coating having a weight per unit area of 21 g / m 2 , namely by partial bonding of a previously extruded film with a carrier fleece.

Drei weitere Ausführungsbeispiele der erfindungsgemäßen Sanierungsdampfbremse 3 neben einem nicht durch die Erfindung umfassten Ausführungsbeispiel sind in der nachfolgend dargestellten Tabelle 1 mit den Angaben zur Wasserdampfdurchlässigkeit, zum Flächengewicht und zum sd-Wert (gemäß DIN 52615, 23°C, 0/85% rel. Feuchte) dargestellt. Diese Sanierungsdampfbremsen können durch Extrusionsbeschichtung mit einem thermisch punktverfestigten Polypropylenspinnvlies (Flächengewicht 40g/m2) hergestellt werden. Tabelle 1 Flächengewicht der Beschichtung
g/m2 Wasserdampfdurchlässigkeit
g/m2d sd-Wert
m Gesamtflächengewicht
g/m2 76 21 1,9 116 50 32 1,25 90 33 54 0,74 73 21 100 0,4 61 Three further embodiments of the invention Sanierungsdampfbremse 3 next to an embodiment not included in the invention are shown in Table 1 below with the information on water vapor permeability, basis weight and s d value (according to DIN 52615, 23 ° C, 0/85% rel Humidity). These remedial steam brakes can be produced by extrusion coating with a thermally punctiform polypropylene spunbonded nonwoven (area weight 40 g / m 2 ). Table 1 Basis weight of the coating
g / m 2 Water vapor permeability
g / m 2 d s d value
m Total basis weight
g / m 2 76 21 1.9 116 50 32 1.25 90 33 54 0.74 73 21 100 0.4 61

Claims (13)

  1. Renovation vapour barrier for use in buildings, in particular for use in facades and/or in renovation of roofs of buildings, where the renovation vapour barrier comprises a plastics foil and has water-vapour-diffusion resistance that is constant across its area, i.e. has one sd value, characterized in that the constant water-vapour-diffusion resistance of the renovation vapour barrier assumes a value of from 0.6 to 1.7 m.
  2. Renovation vapour barrier according to Claim 1, characterized in that it has a constant sd value of from 0,8 to 1.6 m, in particular from 1.0 to 1.5 m.
  3. Renovation vapour barrier according to Claim 1 or 2, characterized in that the plastics foil has been produced by the extrusion process.
  4. Renovation vapour barrier according to any of the preceding claims, characterized in that the plastics foil has been produced from modified polyethylene.
  5. Renovation vapour barrier according to any of the preceding claims, characterized in that the plastics foil has been produced from ethylene-vinyl acetate copolymer.
  6. Renovation vapour barrier according to any of the preceding claims, characterized in that it is flexible, foldable and/or rollable.
  7. Renovation vapour barrier according to any of the preceding claims, characterized in that it is sectionally self-adhesive.
  8. Renovation vapour barrier according to any of the preceding claims, characterized in that it has a self-adhesive margin.
  9. Renovation vapour barrier according to any of the preceding claims, characterized in that it has reinforcement.
  10. Renovation vapour barrier according to any of the preceding claims, characterized in that the reinforcement has been formed from a woven, laid scrim, knit and/or a non-woven structure.
  11. Renovation vapour barrier according to any of the preceding claims, characterized in that it has a backing layer.
  12. Renovation vapour barrier according to any of the preceding claims, characterized in that the backing layer has been formed from a woven or from a non-woven, in particular from a needled non-woven or a thermocompacted non-woven.
  13. Renovation vapour barrier according to any of the preceding claims, characterized in that it comprises additives for establishing colour, fire performance and/or ageing resistance.
EP05817534A 2004-12-10 2005-11-15 Vapor barrier for use in buildings Not-in-force EP1825072B1 (en)

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DE102004059812A DE102004059812A1 (en) 2004-12-10 2004-12-10 Steam brake for use in buildings
PCT/EP2005/012246 WO2006061088A1 (en) 2004-12-10 2005-11-15 Vapor barrier for use in buildings

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EP (1) EP1825072B1 (en)
AT (1) ATE497067T1 (en)
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EA200701258A1 (en) 2007-10-26
PL1825072T3 (en) 2011-06-30
EP1825072A1 (en) 2007-08-29
US20090301016A1 (en) 2009-12-10
DE502005010923D1 (en) 2011-03-10
EA010560B1 (en) 2008-10-30
WO2006061088A1 (en) 2006-06-15
ATE497067T1 (en) 2011-02-15
DE102004059812A1 (en) 2006-06-29

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