EP0003742A1 - Heat and sound insulating panel for roof and wall lining - Google Patents

Abstract

1. Panel for thermal and sound insulation of roofing and cladding composed of two (2 and 3) superposed and glued together layers of stiffed insulating material of analogous nature, such as fiber glass, and where a damp screen is intercalated between the two (2 and 3) layers, characterized by the fact that the position of the damp screen (1) between the two layers (2 and 3) is such that the dew point of the hotest ambient medium is situated above the damp screen (1) in relation to such hotest ambient medium in order to avoid water vapour to condense.

Description

The present invention relates to a new industrial product which is an industrial ceiling panel having both acoustic and thermal qualities and having a vapor barrier.

These panels are intended to be placed between purlins, directly under industrial roofs.

• - Des panneaux isolants en laine de verre avec pare-vapeur en sous-face. Du fait de l'existence de ce pare-vapeur en sous- f_acé, généralement en aluminium, ces. panneaux ont des caractéristiques acoustiques médiocres. D'autre part, ils ne sont pas classés incombustibles, ce qui est un inconvénient dans de nombreux cas.
• - Des panneaux isolants acoustiques en laiene de verre avec projection en sous-face. Les qualités acoustiques de ces panneaux leur sont conférés en majeur partie, par l'aspect poreux de la sous-face. Cette porosité permet à l'air du local de transiter lentement à travers l'isolant. Cet air chaud et humide rencontre la toiture froide et condense. Pour éviter cet inconvénient, il faut actuellement, ménager un grand volume entre la toiture et le plafond et ventiler ce volume.

In the current state of the art, there are

• - Glass wool insulation panels with vapor barrier on the underside. Due to the existence of the vapor barrier sub f _a ce, usually aluminum, these. panels have poor acoustic characteristics. On the other hand, they are not classified as non-combustible, which is a drawback in many cases.
• - Glass wool acoustic insulation panels with projection on the underside. The acoustic qualities of these panels are given to them for the most part by the porous appearance of the underside. This porosity allows the air in the room to pass slowly through the insulation. This hot and humid air meets the cold roof and condenses. To avoid this drawback, it is currently necessary to provide a large volume between the roof and the ceiling and ventilate this volume.

• . Une épaisseur de laine de verre semi-rigide ou matériau similaire ayant des qualités acoustiques et thermiques et étant perméable à l'air.
• . Un pare-vapeur constitué d'une feuille d'aluminium ou d'un matériau similaire.
• . Une épaisseur complémentaire d'isolant à base de laine de verre ou matériau similaire.

The product, object of the present invention, is a complex produced from basic materials existing on the market and comprising, from the underside:

• . A thickness of semi-rigid glass wool or similar material having acoustic and thermal qualities and being breathable.
• . A vapor barrier made of aluminum foil or similar material.
• . An additional thickness of insulation based on glass wool or similar material.

• - de permettre au matériau fibreux, en contact avec l'ambiance, de jouer le rôle d'absorbant acoustique.
• - la couche d'isolant située au-dessus du pare-vapeur, permet à celui-ci de rester à une température entre l'intérieur et l'extérieur, telle qu'elle se trouve au-dessus du point de rosée de l'air humide ambiant qui viendra en contact avec lui. Sur la figure 1, on voit une coupe du produit avec la position du pare-vapeur. Sur la figure 2, nous avons tracé la courbe d'évolution de la température entre l'intérieur (t.) et l'extérieur (t_e),t_r étant la température de rosée de l'air intérieur. On voit qu'il suffit de placer le pare-vapeur en C entre B et D, en gardant une distance B C suffisante sur le plan acoustique pour que le panneau remplisse les trois conditions :
  • . qualités acoustiques
  • . qualités thermiques
  • . étanchéité à la vapeur d'eau

The offset of the vapor barrier in the thickness of the insulation has the effect of:

• - allow the fibrous material, in contact with the environment, to play the role of acoustic absorbent.
• - the layer of insulation located above the vapor barrier, allows it to remain at a temperature between the interior and the exterior, as it is above the dew point of the ambient humid air which will come into contact with it. In Figure 1, we see a section of the product with the position of the vapor barrier. In Figure 2, we have drawn the temperature evolution curve between the interior (t.) And the exterior (t _e ), t _r being the dew point temperature of the interior air. We see that it suffices to place the vapor barrier at C between B and D, keeping a sufficient distance BC acoustically for the panel to meet the three conditions:
  • . acoustic qualities
  • . thermal qualities
  • . water vapor tightness

The panel thus formed is made of non-combustible material, so it is therefore classifiable as non-combustible.

• - Supperposition des trois matériaux à la mise en place sur le chantier. Cette solution n'est pas la meilleure à cause de l'taugmentation sensible du temps de main d'oeuvre.
• - Assemblage en atelier des trois matériaux par collage ou agrafage. Dans le cas de collage, la colle devra nécessaire- ment être incombustiable.

The product can be implemented in two ways:

• - Supposition of the three materials for installation on site. This solution is not the best because of the significant increase in labor time.
• - Assembly in the workshop of the three materials by gluing or stapling. In the case of bonding, the adhesive must necessarily be non-combustible.

In the context of the present invention, any assembly system can be used.

We recommend, however, a point bonding system which, although light is very sufficient since this assembly is simply intended to hold the three materials together during handling and positioning. It does not support any effort, once in place.

• Au droit des points de colle, le pare-vapeur sera percé pour permettre un collage direct entre les deux couches d'isolant. Les per- cements n'entameront pas les qualités du pare-vapeur, parce que la surface intéressée sera très faible et parce que la colle, elle-même, formera pare-vapeur à ces points. Ainsi, la colle n'a pas besoin de prendre sur le pare-vapeur lui-même et cela élargit le choix de colle à utiliser.

Point bonding has the following advantage:

• In line with the adhesive points, the vapor barrier will be drilled to allow direct bonding between the two layers of insulation. The holes will not affect the qualities of the vapor barrier, because the area concerned will be very small and because the adhesive, itself, will form a vapor barrier at these points. Thus, the glue does not need to take on the vapor barrier itself and this widens the choice of glue to use.

The panel thus decnit can be used in all cases of industrial buildings, constructed with roofing and cladding in sheet metal or fiber cement to which we want to give good acoustic and thermal qualities.

Claims (2)

1 - Panel made of an insulating thermal insulating material characterized in that the vapor barrier is located in the thickness of the panel and not on one of the outer faces. The distance from the vapor barrier to the face of the panel is a function of the position of the dew point in the panel. 2 - Device according to claim 1 characterized in that the bonding will be done by point between the two outer layers, the vapor barrier being pierced with glue points.

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