Item : >> > 1000sqft -LRB- 51inch -RRB- >> > perforate 51inch x 235.20 -LRB- 1000 sf -RRB- breathable. for attics, sheds, warehouses, and as house wrap Double-sided 99.9 % unalloyed reinforced ALUMINUM that blocks 97 % of the beamy heat in summer and winter. Industrialized with woven polyethylene scrim for tear resistance. Can not be or ripped Passes required ASTM fire test -LRB- E84 using E2599 mounting method -RRB- for building materials Exceeds required ASTM Water Vapor Permeability -LRB- Breathability -RRB- : 8.5 perms -LRB- ASTM 96-00 -RRB- Super Shield Reflective Insulation is a 5-layer musing energy-shield. It two out layers of 99 % aluminum foil reflect 97 % of beamy heat. Each layer of foil is to a tough layer of Mylar and has an interlinking nylon scrim for supernumerary additional strength. It 's so it 's virtually undoable to tear ! . It also a Class 1, Class A fire rating ! . You 'll that tropic and shivery spots in your home are eliminated summer and winter. You 'll yourself enjoying greater comfort in your home. And, since it does n't use energy to increase your level of comfort, you 'll lower utility bills. How It !!! . As untold as 83 % of the heat gain in the summer place through the ceiling and roof. Super Shield Reflective Insulation the sun 's heat before it can penetrate your home. You will less air conditioning to keep your home unresponsive and homy all summer nightlong. According to the Department of Energy, homeowners can up to 45 % temperature reduction savings depending on the climate, on-line amount of insulation in the attic, and household energy use. many an of our customers have higher results, but these results have not been verified by a simple fraction party. Strongest and Heaviest beamy on the Market.