R Value Of Perlite Roof Insulation

Recommended home insulation r values.

R value of perlite roof insulation.

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. Rsi r value système international is the metric equivalent. To convert rsi to r value multiply the rsi by 5 67826. Insulation level are specified by r value.

To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. R value table for roofing materials and building insulation. Low thermal insulation board. Know exactly how much you need with our project calculators.

R value is a measure of insulation s ability to resist heat traveling through it. Location of r value on a product data sheet. 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. R value is used in the united states.

The increase r21 r3 exactly 18 the value by which you are increasing the r value. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1. Types of roof insulation. Provides good dimensional stability excellent insulation value with stable r value and fire resistance.

The table below shows what levels of insulation are cost effective for different climates and. The percentage increase increase increase original number 100. Provides good dimensional stability excellent insulation value with stable r value and fire resistance. When determining how much insulation you need don t guesstimate calculate.

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 higher the r value the better the thermal performance of the insulation. The higher the r value the greater the insulation performance. R3 r18 r21 total roof r value.

Composed of expanded perlite reinforcing cellulosic fibers and selected binders. The surface is treated to reduce bitumen absorption assuring proper adhesion of roof membranes. I calculate insulation resistance to heat loss or r percentage improvement always as relative to the original number. Typical u values range from 0 21 btu h ft2 f 1 19 w m2 k for a 2 inch 50 8 mm 27 lb ft3 432 kg m3 to 0 12 btu h ft2 f 0 6 w m2 k for a 4 inch 101 6 mm thick roofdeck.

The higher the r value the better a material performs as a thermal insulator. Consists of recycled newsprint to.