Perlite Roof Insulation R Value

High r value 2 5 r. 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. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1.

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Rsi r value système international is the metric equivalent.

Perlite roof insulation r value.

Low thermal insulation board. To convert rsi to r value multiply the rsi by 5 67826. 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. Consists of recycled newsprint to.

Protector hd allows easy efficient scoring cutting and snapping which permits fast tight fabrication and all in a low dust environment. To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. 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. 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. R value is used in the united states. The r value of the insulating concrete depends on its unit weight and thickness. Composed of expanded perlite reinforcing cellulosic fibers and selected binders.

This also means easy hoisting staging and maneuvering around the roof. Provides significantly more thermal insulation r value than wood fiber or gypsum boards.