... kraft facing. Reinforced by fiberglass scrim Ideal facing for heat insulation FSK Construction:FSK facing:Aluminum foil: 7Microns / Polyethylene/Two ... facing) are mainly used as facing for glass wool insulation, rockwool,mineral wool and so on. Also used under roof ... decking, under attic rafters, over existing attic thermal insulation, in floors, walls and crawl spaces, and in industrial ...