Construction: Reflectivealuminum foil facing: Aluminum foil: 7Microns / Polyethylene / Two-Directional Scrim / Kraft 60gsm or 50gsm/ Polyethylene / Foil: 7MicronsApplication:Double sidedaluminum foil facing is mainly used under roof decking,under attic rafters, over existing attic insulation, in floors, walls andcrawl spaces, and in industrial and commercial buildings as radiant barrier or vapor barrier to block radiant heat coming into house through the roof during the summer and retain indoor heat generated during the winter. ReflectiveFSK facing used as a water vapor barrier in air conditioning ductworks and cold rooms. Benefit: Double sided aluminum foil insulation provides high tensile strength and neat appearance, can reflective the radiant heat from the heat source(such as sun) more effectively than single sided aluminum foil insulation. Reflectivealuminum foil facing does not contain hazardous chemicals or harmful materials that cause itching or respiratory problems. Double sided vapor barrieras a radiant barrier stops up to 97% of radiant heat transfer which improves the performance of the insulating material Fiber glass scrim reinforced for strength and durability. Double sided fskinsulation foilprovides an efficient, space saving, and healthy method of temperature control and energy savings. Roll Size: Roll Width:1.2M, 1.25M, 1.3M Roll Length: 40M, 60M etc.