Perlite Roof Insulation R Value

The surface is treated to reduce bitumen absorption assuring proper adhesion of roof membranes.

Perlite roof insulation r value. Perlite roof insulation code compliance thermal performance 1 thickness nominal r value resistance inches mm hr ft 2 f btu m c w 3 4 19 1 2 0 0 35 1 25 4 2 7 0 48 1 1 2 38 1 4 1 0 72 2 51 5 4 0 95 3 76 8 1 1 47 for use over metal decks the minimum thickness of energyguard perlite insulation over metal decks is as follows. Provides good dimensional stability excellent insulation value with stable r value and fire resistance. Composed of expanded perlite reinforcing cellulosic fibers and selected binders. Perlite roof insulation description energyguard perlite roof insulation is a homogeneous board composed of expanded perlite particles selected binders and cellulose fibers which give energyguard perlite roof insulation its insulating efficiency.

For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1. Provides good dimensional stability excellent insulation value with stable r value and fire resistance. Rsi r value système international is the metric equivalent. Low thermal insulation board.

To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. To convert rsi to r value multiply the rsi by 5 67826. R value is used in the united states. Factory cut taper that is easy to install and cut builds slope into an otherwise flat roofing system allowing water to drain freely off the roof.