Vapor barrier for use in the heat insulation of buildings
AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsHartwig Kunzel, Theo Grosskinsky
Life of this patent
Estimating the term…
Abstract
The invention relates to a vapor barrier for use in the thermal insulation of buildings which can be used, in particular, for thermal insulation procedures in new buildings or in the renovation of old buildings. The vapor barrier in accordance with the invention is thereby capable of achieving water vapor exchange under different ambient conditions. This is achieved by using a material which has a water vapor diffusion resistance which is dependent on the ambient humidity and which also has adequate tensile strength and tear resistance.
Claims73
In a method of constructing a new building, the improvement comprising applying a film to a structure of said building, wherein the film has a water vapor diffusion resistance (sd-value) at a relative humidity of an atmosphere surrounding the vapor retarder in the region of 30% to 50% of 2 to 5 meters diffusion-equivalent air layer thickness, and, at a relative humidity in the region of 60% to 80% which is <1 meter diffusion-equivalent air layer thickness.
In a method of renovating a building, the improvement comprising applying a film to a structure of said building, wherein the film has a water vapor diffusion resistance (sd-value) at a relative humidity of an atmosphere surrounding the vapor retarder in the region of 30% to 50% of 2 to 5 meters diffusion-equivalent air layer thickness, and, at a relative humidity in the region of 60% to 80% which is <1 meter diffusion-equivalent air layer thickness.
A method for providing a vapor barrier to a building, comprising installing a film on at least a part of the building, wherein the film has a water vapor diffusion resistance (sd-value) at a relative humidity of an atmosphere surrounding the vapor retarder in the region of 30% to 50% of 2 to 5 meters diffusion-equivalent air layer thickness, and, at a relative humidity in the region of 60% to 80% which is <1 meter diffusion-equivalent air layer thickness.
Dependencies are inferred from the claim text.