RadiantGUARD ULTIMA Radiant Barrier Attic Foil Insulation Roll 48-inch 1000 sq ft (U-1000-B) &ndash; Reflective Aluminum Breathable House-Wrap &ndash; BLOCKs 97% of Heat / 99% RF Signals SCIF RFID 1,000 SQUARE FEET ROLL (28 pounds): 250 linear feet BREATHABLE (perforated) DOUBLE-SIDED pure aluminum foil radiant barrier insulation; reflects 97% radiant heat USED IN RETROFIT & NEW CONSTRUCTION: Best radiant barrier to reduce 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. EASY TO MAINTAIN: Non-toxic; non-carcinogenic; fiber free; easy to install; not affected by humidity; maintenance free; does not promote the growth of fungi or bacteria; does not support nesting by rodents or insects. 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 is a double-sided, industrialized reinforced aluminum foil radiant barrier, 6.5 mils in thickness (6.5 thousandths of an inch / .0065 inches) weighing 28 pounds per 1,000 square feet, highly reflective blocking 97% of the radiant heat, class A / class 1 fire rated, includes an industrialized woven scrim middle layer for puncture and tear resistance making it nearly impossible to tear while easily cut with scissors or utility knife, will not crack, delaminate, or corrode under normal intended use, lightweight, easy to install and maintenance free and not affected by humidity, non-toxic, on-carcinogenic, fiber-free, does not promote the growth of fungi or bacteria, and does not support nesting by rodents or pests. Our <span class="a-text-bold">CLASSIC </span>radiant barrier reflects 95% of the radiant heat and is recommended for installations that don&#039;trequire stapling. It is less durable than our other versions. Our <span class="a-text-bold">ULTIMA </span>radiant barrier reflects 97% of the radiant heat and is an industrialized reinforced tear-proof<span class="a-text-italic">aluminum foil</span> radiant barrier that is recommended for installations requiring stapling and for use in highly rugged environments. Because it&#039;s made of aluminum, it feels and operates like a traditional aluminum foil. Our <span class="a-text-bold">XTREME </span>radiant barrier reflects 95% of the radiant heat and is equally as industrialized as Ultima but is a reinforced tear-proof<span class="a-text-italic">metalized aluminum poly</span> radiant barrier that can also withstand stapling and rugged environments. It feels and operates like a plastic mylar sheet. Start at the peak of your roof. If you have a ridge vent, start 6&#034; from either side of the ridge vent. Using a staple gun with 5/16 staples, staple sections of <span class="a-text-bold">RadiantGUARD </span>across the bottom of the roof rafters either A) horizontally across the attic<span class="a-text-bold"> </span>OR B) down from the peak to within 12 inches of the wall plate on the attic floor. Staples should be placed every 4 to 6 inches to properly secure the radiant barrier. When installing the next row of radiant barrier,overlap the existing row approximately 2 inches and staple. <span class="a-text-bold">NOTE</span>: Its perfectly fine for the radiant barrier to sag a bit as long as you dont leave any gaping openings between each row. If you have gable walls (exterior vertical side walls of your roof), you will need to cover them as well in the same manner. For all roof exhaust vents and gable wall vents, cut out the section of radiant barrier directly adjacent to the vent cutting it approximately 6 inches wider than the vent itself. This is crucial to allow your current ventilation vents to have access to the entire attic space for proper venting of moisture out of your attic space. Start the installation early in the morning when your attic iscoolest. Keep plenty of water on hand and drink consistently; even if not thirsty. Attic temperatures can quickly reach up to 30 to 40 degrees hotter than the outside temperature and being hydrated is vital to your health when working in an attic space. If your attic space it not very bright, bring an additional lighting source to help you see in the darker areas. Always be aware of the attic floor joists you walk on. Some floor joists may roll when walked on if not properly secured. For Do-It-Yourself-ers, spread your install out over the course of a couple of days taking advantage of the morning hours only to work on the install. For professional contractors, work in groups of two or three having one person responsible for cutting the product and handing it to another person responsible for stapling it. Shared responsibilities like this help reduce installation time and reduce the chance of injury from moving around in the attic space performing multiple tasks. reflective sun shades for car dashboards aluminum foil to keep baked potato warm relfective lining of thermos foil packaging for foods like chocolate and fruit reflective thermal blanket for treating hypothermia packaging for pharmaceuticals <span class="a-text-bold">RadiantGUARD </span>radiant barrer (purple area), bare roof decking (left orange square) reflective paint (right orange-red square)