US 7,585,794 B2
	Vapor retarder with shielding against electromagnetic fields
Lothar Bihy, Kaiserslautern (Germany); Birgit Boge, Mannheim (Germany); and Horst Keller, Wilhelmsfeld (Germany)
Assigned to Saint-Gobain Isover, (France)
Appl. No. 10/576,902 PCT Filed Oct. 18, 2004, PCT No. PCT/EP2004/011781 § 371(c)(1), (2), (4) Date Jan. 09, 2007, PCT Pub. No. WO2005/040517, PCT Pub. Date May 06, 2005.
Claims priority of application No. 103 49 170 (DE), filed on Oct. 22, 2003.
Prior Publication US 2007/0093155 A1, Apr. 26, 2007
Int. Cl. B32B 27/04 (2006.01); B32B 27/12 (2006.01); B32B 5/02 (2006.01)

U.S. Cl. 442—117  [442/85; 442/394; 442/398]

15 Claims

1. A vapor retarder for indoor sealing of buildings, especially roof structures, with at least one barrier layer retarding the passage of moisture vapor, especially water vapor, said barrier layer being formed from a material with moisture-adaptive water vapor diffusion resistance, said material changing its diffusion resistance as a function of ambient moisture, characterized by the fact that the vapor retarder has at least one electromagnetic-field-shielding layer for shielding electromagnetic fields in the frequency range of mobile telephone networks, which is formed so as to be permeable to diffusion and which is in the form of an electrically conducting film and/or in the form of a magnetic-shielding film, or comprises a laminated, electrically conducting nonwoven, an especially bonded metal lattice or a vapor-deposited layer of electrically conducting substances each having a mesh size of 5 mm.