Pvc Roofing R Value

R value of various materials.

Pvc roofing r value. Prior to installing the pvc roofing membrane itself typically some type of insulation board is put in. Top ply contains cool roof pigments uv stabilizers and other components to extend the. R value is used in the united states. Offers over three decades of proven pvc roof system performance with billions of square feet of membrane installed across north america.

Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. Pvc polyvinyl chloride a thermoplastic membrane utilizing a reinforcement scrim between the two plies of equal thickness ib roof only. To convert rsi to r value multiply the rsi by 5 67826. Duro last has been successful since the beginning by providing our customers with unmatched service and expertise in the roofing industry.

Sarnathin 50 utilizes sika s proven sarnafil roofing membrane along with r 50 systems rich e board a 1 5 inch thick vacuum sealed insulation with a protective covering on both sides and an r value resistance to heat flow of 50. Allows easy and efficient scoring cutting and snapping which permits fast tight fabrication and all in a low dust environment. Guarantees are available up to 20 years when using everguard pvc 60 mil membrane. You should of course see the manufacturer provided technical data sheet for the r value of specific products.

Rsi r value système international is the metric equivalent. High reflectivity for greater energy savings. Can have an effect on the u and r values shown above. To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826.

Insulation is important because it saves energy by reducing heat loss. High r value 2 9 r. Heat welded seams for greater reliability. Most commonly used insulation is iso or eps foam board.

For a very good introductory overview article on r value see r values over at the website of. Easy three step installation to reduce the chance of application errors. Material u value r value white pine 0 78 1 3 rigid pvc 1 02 1 45 0 69 0 98 cellular pvc 0 48 2 1 aluminum 1642 00061 density moisture content etc. Both of these insulation boards carry an r value that ranges from 4 r to 6 r per 1 inch of insulation thickness.

As illustrated in the table above cellular pvc is a better insulator than white pine or rigid pvc i e. Increased chemical resistance compared to other roofing technologies. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1.