Super Shield Diamond Radiant Barrier Reflective Insulation 48-inch x 250-ft 1000 square feet roll ? Reflective Aluminum Breathable Attic Roof Foil ? BLOCKs 99% of Heat / 99% RF Signals SCIF RFID Super Shield Radiant barrier insulation designed for residential retrofit installations on attic floor 1000 SQUARE FEET ROLL (15 pounds): 250 linear feet BREATHABLE (perforated) DOUBLE-SIDED metalized aluminum film ASTM C1313 certified radiant barrier; reflects 99% radiant heat USED IN RETROFIT & NEW CONSTRUCTION: Reduces residential attic tem-peratures 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 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 Compartmented Information Facility SCIF rooms Double Sided / Meets all Intl and USA Fire Codes Super Shield CLASSIC Radiant Barrier Reflective Insulation 48-inch x 250-ft 1000 square feet roll - Reflective Aluminum Breathable Attic Roof Foil - BLOCKs 99% of Heat / 99% RF Signals SCIF RFID For residential retrofit, particularly in the attic laying over existing insulation, and some OEM applications.