Reflective Air² Insulation retains air longer and provides excellent insulation and sound reduction * Insulation is easy to install with no mess or fumes and will not cause itchy skin * Ideal for attics, exterior and interior walls, radiant floors, metal and steel buildings, crawl spaces, garage ceilings and many other applications * Reflective Air² Insulation meets ASTM standards and complies with Building Code * This insulation roll is 125-feet long, 24-inches high and .03-inches thick