The surface is treated to reduce bitumen absorption assuring proper adhesion of roof membranes.
R value of perlite roof insulation.
R value is used as a measurement of the effectiveness of thermal insulating materials.
R value is a measure of insulation s ability to resist heat traveling through it.
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.
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.
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.
When determining how much insulation you need don t guesstimate calculate.
R3 r18 r21 total roof r value.
Low thermal insulation board.
Consists of recycled newsprint to.
The percentage increase increase increase original number 100.
Rsi r value système international is the metric equivalent.
The higher the r value the better the thermal performance of the insulation.
Insulation level are specified by r value.
Insulating values insulating values of a perlite concrete roofdeck depends on the density of the concrete mix that is prepared.
Composed of expanded perlite reinforcing cellulosic fibers and selected binders.
R value measures how well certain building insulation materials can resist heat.
To convert rsi to r value multiply the rsi by 5 67826.
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 greater the insulation performance.
Location of r value on a product data sheet.
The higher the r value the better a material performs as a thermal insulator.
I calculate insulation resistance to heat loss or r percentage improvement always as relative to the original number.
For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1.
The table below shows what levels of insulation are cost effective for different climates and.
Recommended home insulation r values.
The increase r21 r3 exactly 18 the value by which you are increasing the r value.
Provides good dimensional stability excellent insulation value with stable r value and fire resistance.
Know exactly how much you need with our project calculators.
R value table for roofing materials and building insulation.
