Perlite Roof Insulation R Value

For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1. The r value of the insulating concrete depends on its unit weight and thickness. Composed of expanded perlite reinforcing cellulosic fibers and selected binders.

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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.

Perlite roof insulation r value.

Consists of recycled newsprint to. Low thermal insulation board. To convert rsi to r value multiply the rsi by 5 67826. The surface is treated to reduce bitumen absorption assuring proper adhesion of roof membranes.

Provides good dimensional stability excellent insulation value with stable r value and fire resistance. Rsi r value système international is the metric equivalent. 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. The bag in which the perlite or vermiculite is purchased recommends the mix proportions needed to achieve various unit weights of fresh concrete and oven dry concrete.

To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. Provides good dimensional stability excellent insulation value with stable r value and fire resistance. 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.