EP2243888B1 - Moisture proofing system for wood stand or roof constructions with rafters - Google Patents

Moisture proofing system for wood stand or roof constructions with rafters Download PDF

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Publication number
EP2243888B1
EP2243888B1 EP10159780.5A EP10159780A EP2243888B1 EP 2243888 B1 EP2243888 B1 EP 2243888B1 EP 10159780 A EP10159780 A EP 10159780A EP 2243888 B1 EP2243888 B1 EP 2243888B1
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EP
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Prior art keywords
closure
vapor retarder
elements
attached
vapor
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EP10159780.5A
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German (de)
French (fr)
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EP2243888A3 (en
EP2243888A2 (en
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Peter Bensch
Michael Langkau
Goran Stevanovic
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Saint Gobain Isover G+H AG
Saint Gobain Isover SA France
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Saint Gobain Isover G+H AG
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D12/00—Non-structural supports for roofing materials, e.g. battens, boards
    • E04D12/002—Sheets of flexible material, e.g. roofing tile underlay
    • 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

Definitions

  • the invention relates to a moisture protection system according to the preamble of claim 1.
  • Timber frame constructions are used in the construction sector mainly for roofs, especially pitched roofs, but also half-timbered buildings.
  • the wooden stand construction also serves to accommodate conventional insulation materials for the purpose of thermal insulation.
  • insulating materials in the form of insulation board or insulation boards between the rafters of the timber frame construction are arranged.
  • the wooden stand construction is then suitably sealed towards the interior of the room.
  • the seal is airtight.
  • the requirements for airtightness are specified in DIN 4108, in particular in Part 7.
  • For the airtightness is crucial in addition to the entire covered area, the quality of the connections to adjacent or penetrating components.
  • the seal is also used for the purpose of moisture protection.
  • vapor barrier films are used, which are present in different embodiments.
  • vapor barrier films are polyethylene films with a constant water vapor diffusion resistance number ⁇ , which in practice is converted into the water vapor diffusion equivalent air layer thickness, the so-called s d value.
  • s d value for such polyethylene films is the s d value, for example, in the range of about 100 m.
  • wet-adaptive films DE 19 544 120 , which have a dependent on the ambient humidity changing s d value.
  • Such vapor barrier films accomplish an airtight seal and allow for some vapor diffusion depending on the external environment. This is especially true for wet-adaptive vapor barrier films.
  • Such films open, for example, in the summer, that is, they have a comparatively low vapor diffusion resistance, so that in summer the moisture stored in the wood in the form of water vapor can escape from the wood frame construction in sunlight and heat.
  • the vapor barrier film is therefore virtually impermeable and the vapor pressure gradient causes the water vapor to migrate inwards out of the wooden structure so that the wooden construction can dry out.
  • the film closes at lower ambient humidity, which is the case especially in winter, that is, it then indicates a higher water vapor diffusion resistance, especially in the case of a film DE 19 544 120 an s d value of 2 to 5 m diffusion-equivalent air layer thickness and thus blocks so to speak, so that the penetration of water vapor, which rises from the living rooms, is prevented in the timber frame construction.
  • moisture-adaptive films are also referred to as breathing films.
  • vapor barrier films with a constant water vapor diffusion resistance between 2 to 10 m see EP 1 372 956 ).
  • this Tackerdichtb can not safely prevent a gradual crack propagation starting from the mechanical attachment point, so that a corresponding risk potential remains.
  • nailing or screwing a subsequent correction of the vapor barrier films on the wooden stand construction can hardly be made.
  • the object of the invention is therefore to provide for a simple, fast and safe, that is in particular non-destructive sealing of building structures, especially of wood stud or roof structures with rafters through vapor barrier films, including subsequent corrections, that is, a displacement of the vapor barrier film relative to the building structure should be possible without further notice.
  • a non-destructive and nevertheless perfectly sealing attachment of the vapor barrier film to beams, rafters and the like of a construction by using a conditional by adhesive fastener that is a closure that is claw-capable or klettdata.
  • Such closures have two closure elements which communicate with one another to form a claw connection, one of which is usually formed with a multiplicity of hooks, that is, barbs, and the other closure element is formed with corresponding loops. Pressing the two closure elements against each other, then the Widerphasekchen dig into the loops and it results in a solid Krallverbund, but with a corresponding application of force and a loosening of the composite and thus allows a subsequent position correction of the vapor barrier films during installation.
  • This advantage is particularly important in connection with the problem of creating airtight connections in the weight, where the quick, easy production tailor-made blanks is greatly facilitated by the reversible attachment and removal of a vapor barrier film.
  • the vapor barrier film may be equipped with strip-like sealing tapes which extend in the longitudinal direction of the web and thus of the vapor barrier film.
  • the vapor barrier film is covered over its entire surface with a velcro-compatible, ie clingable layer.
  • the clawable fastener tapes or the full-surface clingable layer are laminated onto the vapor barrier film, wherein the fastener tapes or the layer are formed of a diffusible nonwoven.
  • a nonwoven material here are polypropylene, polyethylene, polyamide and polyethylene terephthalate.
  • the vapor barrier film itself has a functional layer for the sealing, in which case it is suitable in particular for a moisture-adaptive film known per se, which is produced in particular on a polyamide basis.
  • Polyamide 3, polyamide 4 and polyamide 6 have proven to be particularly suitable.
  • the functional layer is not limited to a moisture-adaptive film but any suitable vapor barrier film, but also vapor barrier film can be used.
  • the functional layer may be provided on its top and / or bottom with a reinforcing layer, which is suitably laminated. Suitable reinforcing layers here are fabrics, scrims and nonwovens, for example glass fiber fabric and the like.
  • closure bands or the full-surface clingable layer and the reinforcement layers are also designed to be open to diffusion.
  • the figure shows two beams of a building structure and here two rafters 1 for a pitched roof and a designated 2 vapor barrier film, which is formed from a longitudinally wound and wound into a roll, some already for the purpose of laying on the rafters 1 of a Roll 3 is settled.
  • the illustrated rafters 1 are components of a pitched roof construction, which is usually introduced between the rafters 1 insulating material, such as mineral wool.
  • insulating material such as mineral wool.
  • Such insulation materials are known per se, so that they need not be described in detail here.
  • the insulation by so-called plate-like Klemmfilze, which wound from one to a roll Insulated material track cut to a certain extent according to the rafter spacing and then introduced with a press fit between the rafters executed.
  • this can be carried out in the form of insulating material webs, which are arranged between the rafters and attached by an underside provided aluminum lamination, which projects laterally over the insulating material web by Antackern on the underside of the rafters 1.
  • Such insulation is complemented by a vapor barrier film arranged on the underside, which is attached to the rafter underside and the insulation to the interior air-tight and seals for the purpose of moisture protection.
  • the vapor barrier film 2 is already rolled to a length greater than the rafter spacing of the two rafters 1.
  • the vapor barrier film 2 is first attached to the left rafter, then then on the right post and is mounted in analog form on other, not shown here rafters.
  • clawable closure elements are provided, namely strip-like closure elements 4a, which are attached to the underside of the rafters 1.
  • the attachment is done in a mechanical manner, such as by tacking, by nails or screws.
  • the attachment can also be done by a conventional adhesive bond, such as by gluing the bands 4a with the rafter bottom.
  • the fastener tapes 4a are also delivered in a winding and removed for assembly from the winding and attached to the rafter bottom, in the illustrated embodiment, the fastener tapes 4a extend substantially over the entire rafter length and cover the rafter bottom throughout the entire rafter length continuously.
  • the fastener tapes 4a may be designed for rafter width, but this is not required. In the illustrated embodiment, the fastener tapes cover a substantial portion of the rafter bottom.
  • the vapor barrier film 2 is provided with a corresponding second closure element, which is here formed by strip-like fastener tapes 4b.
  • these fastener tapes 4b extend in the longitudinal direction of the vapor barrier web, the fastener tapes extending over the entire length of the vapor barrier film and being arranged parallel to one another. It is preferred that the fastener tapes are arranged at a uniform distance from each other.
  • the closure elements 4b may also be provided in sections over the length of the insulating material web and thus not continuously. Preferably, however, a full-surface coverage of the vapor barrier film by a correspondingly flat closure element, which has processing advantages in difficult geometrical conditions with a large proportion of blanks.
  • closure elements 4a and 4b are formed as a clip-like and therefore clawable closure elements, it only needs to be suitably applied to the rafter underside and rolled out for attachment of the vapor barrier film and can then be permanently and permanently connected to the coasting by squeezing the closure elements 4a and 4b.
  • the advantage of this claw closure is not only in the simple assembly but also in that the vapor barrier film can be reversibly deducted to correct corrective measures and reoriented accordingly and can be re-attached by pressure on the fastener tapes 4a with appropriate permanent tight fit.
  • the vapor barrier film is formed of polyamide and prepared as a moisture-adaptive vapor barrier film.
  • it is made of polyamide 3, polyamide 4 or polyamide 6 and has a moisture dependent on the ambient moisture vapor diffusion resistance, which is formed with the proviso that the material at a relative humidity of the atmosphere surrounding the vapor barrier in the range of 30 to 50%, an s d value of 2 to 5 m diffusion-equivalent air layer thickness, and at a relative humidity in the range of 60 to 80%, a water vapor Diffusion resistance has an s d value which is less than 1 m diffusion-equivalent air layer thickness.
  • Such a vapor barrier film has the advantage that it allows a drying function in summer, so that the moisture stored in the wood in the form of water vapor in sunlight and heat in the summer emerge and thus dry out the wooden structure. That is, the wet-wicking vapor barrier opens, so to speak, in the summer while it closes in winter, taking advantage of its full vapor barrier function, that is, substantially preventing water vapor from rising from the living spaces, leaving little moisture in the structure due to the high vapor diffusion resistance can penetrate.
  • the fastener tapes 4a have a width of 4 to 10 cm, preferably a width of 6 cm, which is dimensioned for all common rafter widths.
  • the fastener tapes 4b have a width of 5 to 40 cm, wherein the width of the single band can decrease with the number of bands.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
  • Laminated Bodies (AREA)

Description

Die Erfindung betrifft ein Feuchteschutzsystem gemäß Oberbegriff des Patentanspruches 1.The invention relates to a moisture protection system according to the preamble of claim 1.

Holzständerkonstruktionen werden im Bautenbereich maßgeblich für Dächer, insbesondere Steildächer, aber auch Fachwerksbauten verwendet. Hierbei dient die Holzständerkonstruktion auch zur Aufnahme üblicher Dämmstoffmaterialien zum Zwecke der Wärmedämmung. Im Falle einer Holzständerkonstruktion für Dächer werden zumeist Dämmstoffmaterialien in Form einer Dämmstoffbahn oder Dämmstoffplatten zwischen den Sparren der Holzständerkonstruktion angeordnet. Hierbei ist es erforderlich, dass die Holzständerkonstruktion dann zum Rauminneren hin geeignet abgedichtet wird. Hierbei kommt es zum Einen darauf an, dass die Abdichtung luftdicht ist. Die Anforderungen an die Luftdichtheit werden in der DIN 4108, insbesondere im Teil 7, festgelegt. Für die Luftdichtheit entscheidend ist neben der gesamten abgedeckten Fläche die Qualität der Anschlüsse an angrenzende oder durchdringende Bauteile. Zum Anderen wird die Abdichtung auch zum Zwecke des Feuchteschutzes verwendet.Timber frame constructions are used in the construction sector mainly for roofs, especially pitched roofs, but also half-timbered buildings. Here, the wooden stand construction also serves to accommodate conventional insulation materials for the purpose of thermal insulation. In the case of a timber frame construction for roofs usually insulating materials in the form of insulation board or insulation boards between the rafters of the timber frame construction are arranged. In this case, it is necessary that the wooden stand construction is then suitably sealed towards the interior of the room. On the one hand it is important that the seal is airtight. The requirements for airtightness are specified in DIN 4108, in particular in Part 7. For the airtightness is crucial in addition to the entire covered area, the quality of the connections to adjacent or penetrating components. On the other hand, the seal is also used for the purpose of moisture protection.

Für eine solche Abdeckung werden üblicherweise Dampfbremsfolien eingesetzt, die in unterschiedlichen Ausführungsformen vorliegen. Häufig verwendete Dampfbremsfolien sind Polyethylenfolien mit einer konstanten Wasserdampf-Diffusionswider-standszahl µ, die in der Praxis in die wasserdampfdiffusionsäquivalente Luftschichtdicke, den sog. sd-Wert umgerechnet wird. Für derartige Polyethylenfolien liegt der
sd-Wert beispielweise im Bereich von etwa 100 m. Daneben sind feuchteadaptive Folien ( DE 19 544 120 ) bekannt, welche einen abhängig von der Umgebungsfeuchte sich ändernden sd-Wert haben. Derartige Dampfbremsfolien bewerkstelligen einen luftdichten Abschluss und lassen abhängig von der äußeren Umgebung eine gewisse Dampfdiffusion zu. Dies trifft insbesondere für feuchteadaptive Dampfbremsfolien zu. Derartige Folien öffnen sich beispielsweise im Sommer, das heißt sie weisen einen vergleichsweise geringen Dampfdiffusions-Widerstand auf, so dass im Sommer die im Holz gespeicherte Feuchte in Form von Wasserdampf aus der Holzständerkonstruktion bei Sonneneinstrahlung und Wärmeeinwirkung austreten kann. Die Dampfbremsfolie wird somit quasi begrenzt durchlässig und durch das Dampfdruck-Gefälle wandert der Wasserdampf aus der Holzkonstruktion nach innen, so dass die Holzkonstruktion austrocknen kann. Andererseits schließt die Folie bei geringerer Umgebungsfeuchte, was insbesondere im Winter der Fall ist, das heißt sie weist dann einen höheren Wasserdampf-Diffusionswiderstand, insbesondere im Falle einer Folie nach DE 19 544 120 einen sd-Wert von 2 bis 5 m diffusionsäquivalenter Luftschichtdicke auf und sperrt damit gewissermaßen, so dass das Eindringen von Wasserdampf, der aus den Wohnräumen aufsteigt, in die Holzständerkonstruktion verhindert wird. Derartige feuchte-adaptive Folien werden auch als atmende Folien bezeichnet. Darüber hinaus gibt es auch Dampfbremsfolien mit einem konstanten Wasserdampf-Diffusionswiderstand zwischen 2 bis 10 m (vergleiche etwa EP 1 372 956 ).For such a cover usually vapor barrier films are used, which are present in different embodiments. Frequently used vapor barrier films are polyethylene films with a constant water vapor diffusion resistance number μ, which in practice is converted into the water vapor diffusion equivalent air layer thickness, the so-called s d value. For such polyethylene films is the
s d value, for example, in the range of about 100 m. In addition, wet-adaptive films ( DE 19 544 120 ), which have a dependent on the ambient humidity changing s d value. Such vapor barrier films accomplish an airtight seal and allow for some vapor diffusion depending on the external environment. This is especially true for wet-adaptive vapor barrier films. Such films open, for example, in the summer, that is, they have a comparatively low vapor diffusion resistance, so that in summer the moisture stored in the wood in the form of water vapor can escape from the wood frame construction in sunlight and heat. The vapor barrier film is therefore virtually impermeable and the vapor pressure gradient causes the water vapor to migrate inwards out of the wooden structure so that the wooden construction can dry out. On the other hand, the film closes at lower ambient humidity, which is the case especially in winter, that is, it then indicates a higher water vapor diffusion resistance, especially in the case of a film DE 19 544 120 an s d value of 2 to 5 m diffusion-equivalent air layer thickness and thus blocks so to speak, so that the penetration of water vapor, which rises from the living rooms, is prevented in the timber frame construction. Such moisture-adaptive films are also referred to as breathing films. In addition, there are also vapor barrier films with a constant water vapor diffusion resistance between 2 to 10 m (see EP 1 372 956 ).

Damit eine solche Dampfbremse allerdings ihre Wirkung ausüben kann, ist ein luftdichter Anschluss gegenüber der Baukonstruktion erforderlich. Dies bedeutet, dass die großflächig verlegten Dampfbremsfolien auch untereinander luftdicht verbunden werden. Hierzu ist es bekannt, separate Klebebänder für die Verklebung der Dampfbremsen zu verwenden. Aus der DE 20 2005 016 200 sind hierzu Dampfbremsfolien bekannt, die bereits integrierte Klebestreifen für den seitlichen Verbund zu verlegender Dampfbremsfolien aufweisen.However, for such a vapor barrier to exert its effect, an air-tight connection with respect to the building structure is required. This means that the vapor barrier foils laid over a large area are also airtight to each other become. For this purpose, it is known to use separate adhesive tapes for the bonding of the vapor barriers. From the DE 20 2005 016 200 For this purpose, vapor barrier films are known which already have integrated adhesive strips for the lateral composite to be laid vapor barrier films.

Zur Befestigung der Dampfbremsfolien an der Baukonstruktion, insbesondere an einer Holzständer- oder einer Dachkonstruktion mit Sparren, werden üblicherweise mechanische Befestigungsmittel verwendet. Zumeist werden die Dampfbremsen angetackert oder angenagelt. Dies führt aber Zwangsweise zu einer Durchlochung der Dampfbremsen mit der Gefahr einer späteren sich aufweitenden Rissbildung, so dass diese Befestigungsstellen Probleme bereiten können. Zwar ist bekannt, dass zur Vermeidung dieses Problemes diese mechanischen Befestigungsstellen noch gesondert luftdicht abgedichtet werden können, wozu spezielle Abdichtbänder, sogenannte Tackerdichtbänder verwendet werden ( DE 20 2005 010 317 ) können, allerdings hat sich diese Maßnahme wegen des zusätzlichen Aufwands in der Praxis bislang nicht durchgesetzt. Auch die Verwendung dieser Tackerdichtbänder kann eine allmähliche Rissausbreitung ausgehend von der mechanischen Befestigungsstelle nicht sicher verhindern, so dass ein entsprechendes Gefahrenpotential verbleibt. Zudem kann nach erfolgter Befestigung der Dampfbremsfolie durch Tackern, Annageln oder Verschrauben eine nachträgliche Korrektur der Dampfbremsfolien an der Holzständerkonstruktion kaum mehr vorgenommen werden.For attachment of the vapor barrier films to the building structure, in particular to a wooden stand or a roof construction with rafters, usually mechanical fastening means are used. In most cases, the vapor barriers are tacked or nailed. However, this inevitably leads to a perforation of the vapor barriers with the risk of a subsequent widening cracking, so that these attachment points can cause problems. Although it is known that to avoid this problem, these mechanical attachment points can still be sealed airtight separately, including special Abdichtbänder so-called Tackerdichtbänder be used ( DE 20 2005 010 317 ), but this measure has not yet been enforced because of the extra effort in practice. Also, the use of this Tackerdichtbänder can not safely prevent a gradual crack propagation starting from the mechanical attachment point, so that a corresponding risk potential remains. In addition, after the fastening of the vapor barrier film by tacking, nailing or screwing a subsequent correction of the vapor barrier films on the wooden stand construction can hardly be made.

Aufgabe der Erfindung ist es somit, für eine einfache, schnelle und sichere, das heißt insbesondere zerstörungsfreie Abdichtung von Baukonstruktionen, insbesondere von Holzständer- oder Dachkonstruktionen mit Sparren durch Dampfbremsfolien zu sorgen, wobei auch nachträgliche Korrekturen, das heißt ein Versetzen der Dampfbremsfolie relativ zur Baukonstruktion ohne Weiteres möglich sein soll.The object of the invention is therefore to provide for a simple, fast and safe, that is in particular non-destructive sealing of building structures, especially of wood stud or roof structures with rafters through vapor barrier films, including subsequent corrections, that is, a displacement of the vapor barrier film relative to the building structure should be possible without further notice.

Diese Aufgabe wird erfindungsgemäß durch die im kennzeichnenden Teil des Anspruches 1 enthaltenen Merkmale gelöst, wobei zweckmäßige Weiterbildungen durch die in den Unteransprüchen angegebenen Maßnahmen gekennzeichnet sind.This object is achieved by the features contained in the characterizing part of claim 1, wherein expedient developments are characterized by the measures specified in the dependent claims.

Nach Maßgabe der Erfindung erfolgt eine zerstörungsfreie und gleichwohl einwandfrei abdichtende Befestigung der Dampfbremsfolie an Balken, Sparren und dergleichen einer Baukonstruktion durch Verwendung eines durch Verkrallung bedingten Haftverschlusses, das heißt eines Verschlusses, der krallfähig bzw. klettfähig ist. Derartige Verschlüsse weisen zwei zur Bildung eines Krallverbunds miteinander kommunizierende Verschlusselemente auf, von denen eines üblicherweise mit einer Vielzahl von Häkchen, das heißt Widerhäkchen, ausgebildet, und das andere Verschlusselement mit entsprechenden Schlaufen ausgebildet ist. Drückt man die beiden Verschlusselemente gegeneinander, dann verkrallen sich die Widerhäkchen in den Schlaufen und es ergibt sich ein fester Krallverbund, der aber unter entsprechender Kraftaufwendung auch ein Lösen des Verbundes und damit eine nachträgliche Lagekorrektur der Dampfbremsfolien während des Verlegens ermöglicht.According to the invention, a non-destructive and nevertheless perfectly sealing attachment of the vapor barrier film to beams, rafters and the like of a construction by using a conditional by adhesive fastener, that is a closure that is claw-capable or klettfähig. Such closures have two closure elements which communicate with one another to form a claw connection, one of which is usually formed with a multiplicity of hooks, that is, barbs, and the other closure element is formed with corresponding loops. Pressing the two closure elements against each other, then the Widerhäkchen dig into the loops and it results in a solid Krallverbund, but with a corresponding application of force and a loosening of the composite and thus allows a subsequent position correction of the vapor barrier films during installation.

Dieser Vorteil fällt insbesondere in Zusammenhang mit der Problemstellung der Schaffung luftdichter Anschlüsse ins Gewicht, wo die schnelle, einfache Anfertigung passgenauer Zuschnitte durch das reversible Anbringen und Entfernen einer Dampfbremsfolie erheblich erleichtert wird.This advantage is particularly important in connection with the problem of creating airtight connections in the weight, where the quick, easy production tailor-made blanks is greatly facilitated by the reversible attachment and removal of a vapor barrier film.

Von den beiden kommunizierenden Verschlusselementen wird eines an den Balken oder Sparren befestigt, was mechanisch durch Tackern, Annageln und dergleichen oder durch einen Haftverbund, insbesondere Kleberverbund erfolgen kann. Das andere Verschlusselement wird an der Dampfbremsfolie vorgesehen. Hierbei kann die Dampfbremsfolie mit streifenartigen Verschlussbändern ausgerüstet sein, die sich in Längsrichtung der Bahn und damit der Dampfbremsfolie erstrecken. Vorzugsweise wird jedoch die Dampfbremsfolie vollflächig mit einer klettfähigen, das heißt verkrallfähigen Schicht abgedeckt.Of the two communicating closure elements one is attached to the beams or rafters, which can be done mechanically by tacking, nailing and the like or by an adhesive bond, in particular adhesive bond. The other closure element is provided on the vapor barrier film. In this case, the vapor barrier film may be equipped with strip-like sealing tapes which extend in the longitudinal direction of the web and thus of the vapor barrier film. Preferably However, the vapor barrier film is covered over its entire surface with a velcro-compatible, ie clingable layer.

Dadurch ergibt sich ein einfaches und schnelles Verlegen der Dämmstoffbahn an der Baukonstruktion. Im Falle von Sparren einer Dachkonstruktion wird das Ende der zu einer Rolle aufgewickelten Dampfbremsfolie an einem ersten Sparren fixiert und manuell an der mit einem Verschlussband versehenen Sparrenunterseite angedrückt und dann fortschreitend quer zu den beabstandeten Sparren der Dachkonstruktion entrollt und unter Andrückung der weiteren Streifen oder Bänder großflächig verlegt. Diese Verlegung ist infolge der Krallverbindung völlig zerstörungsfrei und das Verlegen der Dampfbremsfolie kann durch eine Person erfolgen. Ein weiterer besonderer Vorteil liegt auch darin, dass eine nachträgliche Korrektur ohne Weiteres möglich ist, wenn die Dampfbremsfolienbahn nicht exakt ausgerichtet angesetzt wurde.This results in a simple and fast laying of the insulating material web on the building structure. In the case of rafters of a roof construction, the end of the wound to a roll vapor barrier film is fixed to a first rafter and pressed manually on the provided with a fastener tape rafter bottom and then progressively unrolled transversely to the spaced rafters of the roof construction and large pressure under pressure of the other strips or bands laid. This installation is completely non-destructive due to the Krall connection and the laying of the vapor barrier film can be done by one person. Another particular advantage lies in the fact that a subsequent correction is readily possible if the vapor barrier film web has not been set exactly aligned.

Die krallfähigen Verschlussbänder oder die vollflächige verkrallfähige Schicht werden auf die Dampfbremsfolie aufkaschiert, wobei die Verschlussbänder oder die Schicht aus einem diffusionsfähigen Vlies gebildet sind. Als Vliesmaterial eignet sich hierbei Polypropylen, Polyethylen, Polyamid und PolyethylenTerephthalat.The clawable fastener tapes or the full-surface clingable layer are laminated onto the vapor barrier film, wherein the fastener tapes or the layer are formed of a diffusible nonwoven. As a nonwoven material here are polypropylene, polyethylene, polyamide and polyethylene terephthalate.

Wesentlich ist, dass diese Vliese eine Vielzahl von Schlaufen aufweisen, so dass jedenfalls mit dem weiteren Verschlussmittel dann ein Krallverbund erzielt werden kann. Derartige Krallverschlusselemente sind im Prinzip bereits bekannt, so dass sie hier im Einzelnen auch nicht beschrieben werden müssen. Diese sind auch nicht auf Häkchen und Schlaufen bzw. Flauschband begrenzt, sondern können auch durch sogenannte Pilzbänder mit Veloursband oder Flauschband und dergleichen gebildet sein.It is essential that these webs have a plurality of loops, so that in any case with the further closure means then a Krallverbund can be achieved. Such Krall closure elements are already known in principle, so that they need not be described here in detail. These are not limited to hooks and loops or loop tape, but may also be formed by so-called mushroom bands with velor or loop tape and the like.

Die Dampfbremsfolie selbst weist eine Funktionsschicht für die Abdichtung auf, wobei es sich hierbei insbesondere um eine an sich bekannte feuchteadaptive Folie eignet, die insbesondere auf Polyamidbasis hergestellt ist. Als besonders geeignet haben sich hierbei Polyamid 3, Polyamid 4 und Polyamid 6 herausgestellt. Allerdings ist die Funktionsschicht nicht auf eine feuchteadaptive Folie eingeschränkt sondern es kann jede geeignete Dampfbremsfolie, aber auch Dampfsperrfolie, verwendet werden. Darüber hinaus kann die Funktionsschicht an ihrer Ober- und/oder Unterseite mit einer Verstärkungsschicht versehen sein, die zweckmäßigerweise aufkaschiert ist. Als geeignete Verstärkungsschichten sind hierbei Gewebe, Gittergelege und Vliese zu nennen, beispielsweise Glasseidengewebe und dergleichen.The vapor barrier film itself has a functional layer for the sealing, in which case it is suitable in particular for a moisture-adaptive film known per se, which is produced in particular on a polyamide basis. Polyamide 3, polyamide 4 and polyamide 6 have proven to be particularly suitable. However, the functional layer is not limited to a moisture-adaptive film but any suitable vapor barrier film, but also vapor barrier film can be used. In addition, the functional layer may be provided on its top and / or bottom with a reinforcing layer, which is suitably laminated. Suitable reinforcing layers here are fabrics, scrims and nonwovens, for example glass fiber fabric and the like.

Zweckmäßigerweise sind auch die Verschlussbänder oder die vollflächige verkrallfähige Schicht und die Verstärkungsschichten diffusionsoffen ausgebildet.Expediently, the closure bands or the full-surface clingable layer and the reinforcement layers are also designed to be open to diffusion.

Nachfolgend wird ein spezielles Ausführungsbeispiel der Erfindung anhand der Zeichnung beschrieben, deren einzige Figur in rein schematischer Darstellung einen Teil einer Dachkonstruktion mit einer bereits teilweise von einer Rolle abgewickelten Dampfbremsfolie zeigt.Hereinafter, a specific embodiment of the invention will be described with reference to the drawing, the single figure shows a purely schematic representation of part of a roof construction with a partially already unwound from a roll of vapor barrier film.

Die Figur zeigt zwei Balken einer Baukonstruktion und zwar hier zwei Sparren 1 für ein Schrägdach und eine mit 2 bezeichnete Dampfbremsfolie, die aus einer längs verlaufenden und zu einer Rolle gewickelten Bahn gebildet ist, die teilweise bereits zum Zwecke der Verlegung an den Sparren 1 von einer Rolle 3 abgewickelt ist.The figure shows two beams of a building structure and here two rafters 1 for a pitched roof and a designated 2 vapor barrier film, which is formed from a longitudinally wound and wound into a roll, some already for the purpose of laying on the rafters 1 of a Roll 3 is settled.

Die dargestellten Sparren 1 sind Bestandteile einer Schrägdachkonstruktion, wobei üblicherweise zwischen den Sparren 1 Dämmstoffmaterial eingebracht ist, etwa aus Mineralwolle. Derartige Dämmstoffmaterialien sind an sich bekannt, so dass sie hier nicht näher beschrieben werden müssen. Üblicherweise wird die Dämmung durch sogenannte plattenartige Klemmfilze, die von einer zu einer Rolle gewickelten Dämmstoffbahn entsprechend des Sparrenabstands mit einem gewissen Übermaß abgelängt und dann mit Klemmsitz zwischen den Sparren eingebracht werden, ausgeführt. Alternativ kann diese in Form von Dämmstoffbahnen ausgeführt sein, die zwischen den Sparren angeordnet und über eine unterseitig vorgesehene Alukaschierung, die seitlich über die Dämmstoffbahn vorsteht durch Antackern an der Unterseite der Sparren 1 befestigt sind. Eine solche Dämmung wird ergänzt durch eine unterseitig angeordnete Dampfbremsfolie, die an der Sparrenunterseite befestigt wird und die Dämmung zum Rauminneren luftdicht und zum Zwecke des Feuchteschutzes abdichtet.The illustrated rafters 1 are components of a pitched roof construction, which is usually introduced between the rafters 1 insulating material, such as mineral wool. Such insulation materials are known per se, so that they need not be described in detail here. Usually, the insulation by so-called plate-like Klemmfilze, which wound from one to a roll Insulated material track cut to a certain extent according to the rafter spacing and then introduced with a press fit between the rafters executed. Alternatively, this can be carried out in the form of insulating material webs, which are arranged between the rafters and attached by an underside provided aluminum lamination, which projects laterally over the insulating material web by Antackern on the underside of the rafters 1. Such insulation is complemented by a vapor barrier film arranged on the underside, which is attached to the rafter underside and the insulation to the interior air-tight and seals for the purpose of moisture protection.

Im dargestellten Ausführungsbeispiel ist die Dampfbremsfolie 2 bereits auf eine Länge größer den Sparrenabstand der beiden Sparren 1 abgerollt. Die Dampfbremsfolie 2 wird zuerst am linken Sparren befestigt, anschließend dann am rechten Pfosten und wird in analoger Form an weiteren, hier nicht dargestellten Sparren angebracht.In the illustrated embodiment, the vapor barrier film 2 is already rolled to a length greater than the rafter spacing of the two rafters 1. The vapor barrier film 2 is first attached to the left rafter, then then on the right post and is mounted in analog form on other, not shown here rafters.

Hierzu sind miteinander krallfähige Verschlusselemente vorgesehen, nämlich streifenartige Verschlusselemente 4a, die an der Unterseite der Sparren 1 befestigt sind. Die Befestigung erfolgt in mechanischer Weise, etwa durch Antackern, durch Nägel oder Schrauben. Die Befestigung kann aber auch durch eine übliche Haftverbindung, etwa durch Verkleben der Bänder 4a mit der Sparrenunterseite, erfolgen. Die Verschlussbänder 4a werden gleichfalls in einem Wickel angeliefert und zur Montage vom Wickel abgezogen und an der Sparrenunterseite befestigt, wobei im dargestellten Ausführungsbeispiel die Verschlussbänder 4a sich im Wesentlichen über die gesamte Sparrenlänge erstrecken und hier die Sparrenunterseite über die gesamte Sparrenlänge durchgehend abdecken. Die Verschlussbänder 4a können auf Sparrenbreite ausgelegt sein, was jedoch nicht erforderlich ist. Im dargestellten Ausführungsbeispiel überdecken die Verschlussbänder einen wesentlichen Bereich der Sparrenunterseite.For this purpose clawable closure elements are provided, namely strip-like closure elements 4a, which are attached to the underside of the rafters 1. The attachment is done in a mechanical manner, such as by tacking, by nails or screws. The attachment can also be done by a conventional adhesive bond, such as by gluing the bands 4a with the rafter bottom. The fastener tapes 4a are also delivered in a winding and removed for assembly from the winding and attached to the rafter bottom, in the illustrated embodiment, the fastener tapes 4a extend substantially over the entire rafter length and cover the rafter bottom throughout the entire rafter length continuously. The fastener tapes 4a may be designed for rafter width, but this is not required. In the illustrated embodiment, the fastener tapes cover a substantial portion of the rafter bottom.

Zur Bildung eines lösbaren Krallhaftschnellverschlusses ist auch die Dampfbremsfolie 2 mit einem entsprechenden zweiten Verschlusselement versehen, welches hier auch durch streifenartige Verschlussbänder 4b gebildet ist. Diese Verschlussbänder 4b erstrecken sich im dargestellten Ausführungsbeispiel in Längsrichtung der Dampfbremsbahn, wobei die Verschlussbänder sich über die gesamte Länge der Dampfbremsfolie erstrecken sowie und parallel zueinander angeordnet sind. Es ist bevorzugt, dass die Verschlussbänder in gleichmäßigem Abstand zueinander angeordnet sind. Im Übrigen können bei Bedarf die Verschlusselemente 4b auch abschnittsweise über die Länge der Dämmstoffbahn und damit nicht durchgehend vorgesehen sein. Bevorzugt ist jedoch eine vollflächige Abdeckung der Dampfbremsfolie durch ein entsprechend flächiges Verschlusselement, welches bei schwierigen geometrischen Verhältnissen mit einem großen Anteil an Zuschnitten Verarbeitungsvorteile aufweist.To form a releasable Krallhaftschnellverschlusses also the vapor barrier film 2 is provided with a corresponding second closure element, which is here formed by strip-like fastener tapes 4b. In the illustrated exemplary embodiment, these fastener tapes 4b extend in the longitudinal direction of the vapor barrier web, the fastener tapes extending over the entire length of the vapor barrier film and being arranged parallel to one another. It is preferred that the fastener tapes are arranged at a uniform distance from each other. Incidentally, if necessary, the closure elements 4b may also be provided in sections over the length of the insulating material web and thus not continuously. Preferably, however, a full-surface coverage of the vapor barrier film by a correspondingly flat closure element, which has processing advantages in difficult geometrical conditions with a large proportion of blanks.

Da die Verschlusselemente 4a und 4b als klettenartige und damit krallfähige Verschlusselemente ausgebildet sind, braucht zur Befestigung der Dampfbremsfolie diese nur geeignet an die Sparrenunterseite angelegt und ausgerollt werden und kann dann mit dem Ausrollen manuell durch Zusammendrücken der Verschlusselemente 4a und 4b fest und dauerhaft verbunden werden. Der Vorteil dieses Krallhaftverschlusses besteht aber nicht nur in der einfachen Montage sondern auch darin, dass die Dampfbremsfolie reversibel zu Korrekturmaßnahmen auch wieder abgezogen und entsprechend neu ausgerichtet und durch Druck erneut an den Verschlussbändern 4a mit entsprechendem dauerhaften Festsitz befestigt werden kann.Since the closure elements 4a and 4b are formed as a clip-like and therefore clawable closure elements, it only needs to be suitably applied to the rafter underside and rolled out for attachment of the vapor barrier film and can then be permanently and permanently connected to the coasting by squeezing the closure elements 4a and 4b. The advantage of this claw closure is not only in the simple assembly but also in that the vapor barrier film can be reversibly deducted to correct corrective measures and reoriented accordingly and can be re-attached by pressure on the fastener tapes 4a with appropriate permanent tight fit.

Im dargestellten Ausführungsbeispiel ist die Dampfbremsfolie aus Polyamid gebildet und als feuchteadaptive Dampfbremsfolie gerüstet. Insbesondere ist sie aus Polyamid 3, Polyamid 4 oder Polyamid 6 gebildet und weist einen von der Umgebungsfeuchte abhängigen Wasserdampf-Diffusionswiderstand auf, der gebildet ist mit der Maßgabe, dass das Material bei einer relativen Feuchte der die Dampfbremse umgebenden Atmosphäre im Bereich von 30 bis 50% einen sd-Wert von 2 bis 5 m diffusionsäquivalente Luftschichtdicke, und bei einer relativen Feuchte im Bereich von 60 bis 80% einen Wasserdampf-Diffusionswiderstand einen sd-Wert aufweist, der kleiner 1m diffusionsäquivalente Luftschichtdicke ist. Eine derartige Dampfbremsfolie hat den Vorteil, dass sie im Sommer eine Trocknungsfunktion zulässt, so dass die im Holz gespeicherte Feuchte in Form von Wasserdampf bei Sonneneinstrahlung und Wärmeeinwirkung im Sommer austreten und damit die Holzkonstruktion austrocknen kann. Das heißt, die feuchteadaptive Dampfbremsfolie öffnet sich sozusagen im Sommer, während sie im Winter schließt und dabei ihre volle Dampfbremsfunktion ausnutzt, das heißt, dass Eindringen von Wasserdampf, der aus den Wohnräumen aufsteigt, im Wesentlichen verhindert, so dass nur wenig Feuchtigkeit in die Konstruktion aufgrund des hohen Dampfdiffusionswiderstands eindringen kann.In the illustrated embodiment, the vapor barrier film is formed of polyamide and prepared as a moisture-adaptive vapor barrier film. In particular, it is made of polyamide 3, polyamide 4 or polyamide 6 and has a moisture dependent on the ambient moisture vapor diffusion resistance, which is formed with the proviso that the material at a relative humidity of the atmosphere surrounding the vapor barrier in the range of 30 to 50%, an s d value of 2 to 5 m diffusion-equivalent air layer thickness, and at a relative humidity in the range of 60 to 80%, a water vapor Diffusion resistance has an s d value which is less than 1 m diffusion-equivalent air layer thickness. Such a vapor barrier film has the advantage that it allows a drying function in summer, so that the moisture stored in the wood in the form of water vapor in sunlight and heat in the summer emerge and thus dry out the wooden structure. That is, the wet-wicking vapor barrier opens, so to speak, in the summer while it closes in winter, taking advantage of its full vapor barrier function, that is, substantially preventing water vapor from rising from the living spaces, leaving little moisture in the structure due to the high vapor diffusion resistance can penetrate.

Im dargestellten Ausführungsbeispiel weisen die Verschlussbänder 4a eine Breite von 4 bis 10 cm auf, bevorzugt ist eine Breite von 6 cm, die auf alle gängigen Sparrenbreiten dimensioniert ist. Die Verschlussbänder 4b weisen eine Breite von 5 bis 40 cm auf, wobei die Breite des einzelnen Bandes mit der Anzahl der Bänder abnehmen kann. Mit diesen Maßnahmen wird erreicht, dass die Dampfbremsfolien in sehr einfacher und schneller Weise ohne jedwede Zerstörung durch Befestigungsmittel an der Spanunterseite befestigt und zu dem der Verbund so ausgelegt ist, dass auch eine spätere Korrektur ohne Weiteres mit einer daran anschließenden erneuten sicheren Befestigung möglich ist.In the illustrated embodiment, the fastener tapes 4a have a width of 4 to 10 cm, preferably a width of 6 cm, which is dimensioned for all common rafter widths. The fastener tapes 4b have a width of 5 to 40 cm, wherein the width of the single band can decrease with the number of bands. With these measures it is achieved that the vapor barrier films fastened in a very simple and fast way without any destruction by fasteners on the chip bottom and to which the composite is designed so that a subsequent correction is readily possible with a subsequent re-secure attachment.

Claims (12)

  1. A moisture protection system for wooden beam or roof structures comprising rafter elements including at least one vapor retarder foil attached at the elements of the structure towards an interior of the structure,
    characterized in that the vapor retarder foil (2) is attached at the elements (1) by a disengageable adhesion closure (4a, b) caused by interlocking which is formed by a first closure element (4a) and a second closure element (4b) that are interlockable with each other wherein the first closure elements (4a) are attached at the elements and wherein the at least one second closure element o (4b) is attached at the vapor retarder foil, thus respectively at the surfaces that are oriented towards each other, wherein the second closure element (4b) is formed by a fleece that is open to diffusion and attached to the vapor retarder foil (2) and wherein the fleece is formed as an interlockable layer on the vapor retarder foil wherein the vapor retarder foil is an elongated web and is windable together with the interlockable layer to form a roll, and wherein the first closure elements are configured as closure bands (4a) which are respectively windable into a roll and are arranged along an extension of the elements after unwinding the roll.
  2. The system according to claim 1,
    characterized in that the first closure element (4a) includes a plurality of hooks and the second closure element (4b) includes a plurality of loops for forming a hook and loop closure or vice versa, wherein the hooks and loops communicate with one another to form the hook and loop closure, and wherein the closure elements are advantageously made from polypropylene, polyamide, polyethylene or polyethylene-terephthalate.
  3. The system according to claim 1 or 2,
    characterized in that the interlockable layer covers the vapor retarder foil in its entirety.
  4. The system according to one of the claims1 - 3,
    characterized in that the second closure element (4b) is formedby interlockable strip shaped closure bands (4b) which respectively extend in a longitudinal direction of the web essentially over an entire length of the web.
  5. The system according to one of the preceding claims,
    characterized in that the first closure bands (4a) essentially extend over an entire length of the rafter and are arrangeable at the rafter.
  6. The system according to claim 5 ,
    characterized in that the closure bands (4a) are mechanically attached at the rafters (1), in particular by stapling, nails, screws and similar or through an adhesion interconnection in particular a glue interconnection.
  7. The system according to one of the preceding claims,
    characterized in that the first closure element (4a) is respectively formed as a windable hook band.
  8. The system according to one of the preceding claims,
    characterized in that the vapor retarder foil (2) is advantageously formed diffusion open from a functional layer with constant water vapor diffusion resistance (sd- value) or from a moisture adaptive functional layer, and thus advantageously a functional layer formed as a moisture adaptive foil with an sd- value of 2 - 5 m diffusion equivalent air layer thickness at an ambient humidity in a range of 30 - 50 % and an sd- value of less than 1 m diffusion equivalent air layer thickness at an ambient humidity of 60 - 80%.
  9. The system according to claim 8,
    characterized in that the functional layer is formed by polyamide.
  10. The system according to claim 8 or 9,
    characterized in that the vapor retarder foils (2) are provided with an advantageously diffusion open reinforcement layer above and/or below the functional layer.
  11. The system according to claim 10,
    characterized in that the reinforcement layer is attached to the functional layer to form the vapor retarder foil.
  12. The system according to claim 10 or 11,
    characterized in that the reinforcement layer is formed by a flexible fabric, grid laid material or fleece.
EP10159780.5A 2009-04-15 2010-04-13 Moisture proofing system for wood stand or roof constructions with rafters Active EP2243888B1 (en)

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PL10159780T PL2243888T3 (en) 2009-04-15 2010-04-13 Moisture proofing system for wood stand or roof constructions with rafters

Applications Claiming Priority (1)

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DE102009017486A DE102009017486A1 (en) 2009-04-15 2009-04-15 Moisture protection system for building structures, in particular timber stand or roof structures with rafters or beams and the like

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EP2243888A2 EP2243888A2 (en) 2010-10-27
EP2243888A3 EP2243888A3 (en) 2011-11-16
EP2243888B1 true EP2243888B1 (en) 2015-10-07

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DE (1) DE102009017486A1 (en)
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Publication number Priority date Publication date Assignee Title
US10513853B2 (en) 2016-03-24 2019-12-24 Owens Corning Intellectual Capital, Llc Roof covering and method of applying the same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2263375A1 (en) * 1972-12-23 1974-07-04 Braas & Co Gmbh COVERING LARGE-AREA DOCUMENTS, IN PARTICULAR ROOFS AND WALLS WITH PLASTIC SHEETS
DE4100902A1 (en) * 1990-02-26 1991-08-29 Huels Troisdorf Attaching sealing membrane to substrates - using hooked pile type fasteners fixed to membrane and to e.g. foundation respectively so that bond can always be released if desired
DE19514420C1 (en) 1995-04-19 1997-03-06 Fraunhofer Ges Forschung Vapor barrier for use in the thermal insulation of buildings
EP1795654A3 (en) * 2000-04-26 2008-08-06 Velcro Industries B.V. (NL) A method of retaining soil or confining water flows with an environmental membrane
US20030070391A1 (en) * 2000-04-26 2003-04-17 Tachauer Ernesto S. Fastening with wide fastening membrane
ATE393016T1 (en) 2001-03-08 2008-05-15 Biolog Insel Lothar Moll Gmbh USE OF IONOMERS FOR SEALING INSULATION MATERIALS
DE202005010317U1 (en) 2005-06-30 2005-09-29 Superglass Dämmstoffe GmbH Damp=proof course system for building roofs, includes elastic sealing tape acting as underlay or support
DE202005016200U1 (en) 2005-10-13 2005-12-22 Saint-Gobain Isover G+H Ag Vapor barrier foil for thermal insulation material for buildings is provided at least along one edge zone with an adhesive layer for purposes of joining it with an overlap to the adjacent foil

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DE102009017486A1 (en) 2010-10-21
EP2243888A3 (en) 2011-11-16
PL2243888T3 (en) 2016-04-29
EP2243888A2 (en) 2010-10-27

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