R Value Of Perlite Roof Insulation

R value is a measure of insulation s ability to resist heat traveling through it.

R value of perlite roof insulation.

Know exactly how much you need with our project calculators. The surface is treated to reduce bitumen absorption assuring proper adhesion of roof membranes. To convert rsi to r value multiply the rsi by 5 67826. The higher the r value the better the thermal performance of the insulation.

R value table for roofing materials and building insulation. Types of roof insulation. R value is used as a measurement of the effectiveness of thermal insulating materials. The increase r21 r3 exactly 18 the value by which you are increasing the r value.

R value measures how well certain building insulation materials can resist heat. Recommended home insulation r values. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1. Composed of expanded perlite reinforcing cellulosic fibers and selected binders.

Location of r value on a product data sheet. Consists of recycled newsprint to. Low thermal insulation board. The table below shows what levels of insulation are cost effective for different climates and.

To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. R3 r18 r21 total roof r value. The percentage increase increase increase original number 100. 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.

The higher the r value the better a material performs as a thermal insulator. The higher the r value the greater the insulation performance. Provides good dimensional stability excellent insulation value with stable r value and fire resistance. Insulating values insulating values of a perlite concrete roofdeck depends on the density of the concrete mix that is prepared.

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. Insulation level are specified by r value. I calculate insulation resistance to heat loss or r percentage improvement always as relative to the original number. Rsi r value système international is the metric equivalent.

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.