Radiant Barrier NASATech Platinum Guard Commercial Grade 8 Mil Breathable Attic Foil Insulation (1000 Square Feet Roll) Strongest and Heaviest Radiant Barrier Attic Foil on the Market 1,000 SQUARE FEET ROLL (32 pounds): 250 linear feet BREATHABLE (perforated) DOUBLE-SIDED Aluminum Metalized Waterproof foil ASTM C1313 certified radiant barrier; reflects 99.7% radiant heat USED IN RETROFIT & NEW CONSTRUCTION: Reduces residential attic temperatures up to 40 degrees; lowers utility bills year round. Thermal insulation used in attic space, garage, garage doors, housewrap, workshop, shed, storage unit, commercial metal building, pole barn, as pallet wrap, and more. INDUSTRIALIZED GRADE: Is TEAR & PUNCTURE PROOF yet cuts easily with utility scissors or hack saw. Reflects 97% of the radiant heat. ASTM CERTIFIED: Meets all American Society for Testing and Materials (ASTM) requirements for radiant barrier classification (C1313) Exceeds all FIRE, SMOKE, (ASTM E-86) and BREATHABILITY requirements for building materials (ASTM 96-00). BLOCKs 99.06% of RF signals (IEEE-299) for Sensitive 4 ft X 250 ft roll (1000 sf) breathable. Ideal for attics, sheds, warehouses, and as house wrap Double-sided 99.9% PURE reinforced ALUMINUM that blocks 97% of the radiant heat in summer and winter 8 Mil strongest heaviest Barrier on the market Industrialized strength with woven polyethylene scrim for tear resistance. Cannot be torn or ripped Passes required ASTM fire test (E84 using E2599 mounting method) for building materials Exceeds required ASTM Water Vapor Permeability (Breathability): 6.5 perms (ASTM 96-00)