To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826.
Pvc roof membrane r value.
Thermoplastic membrane pvc roofing added 11 2012 07 54 19 1 thermal and moisture protection guide specification section 07 54 19 single ply pvc reroofing.
Our high performing single ply roofing solutions offer unrivaled reliability and longevity.
For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1.
Part 1 general.
The american society of testing and materials astm requires a roofing membrane to have a minimum breaking strength of 200 pounds per inch.
Currently cellular foams with r values of 5 to 6 per inch are used whereas the earlier non cellular wood fiber perlite and glass fiber insulations were closer to 3.
To convert rsi to r value multiply the rsi by 5 67826.
Pvc roofing membranes far surpass this standard all having a minimum breaking strength of 350 pounds per inch.
Heat welded seams for greater reliability.
Both types have an r value ranging from 4 r to 6 r per 1 inch of insulation thickness.
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.
Rsi r value système international is the metric equivalent.
Mechanically attached installation uses heavy duty screws and barbed plates to hold the membrane down tightly and is not affected by possible iso de lamination.
High reflectivity for greater energy savings.
Learn more about our 55 years of experience in the roofing industry.
Roof membrane available in 40 50 and 60 mil thickness.
Sika sarnafil is a leading manufacturer of pvc roofing and waterproofing systems in the usa.
Thinner is definitely an advantage.
Increased chemical resistance compared to other roofing technologies.
All roofing areas flashings penetrations and equipment shall be included in the work under this section.
Duro last 50 mil membrane is manufactured with 28 mil of thickness on the top performance layer far exceeding industry standards as well as competitor systems with equal and even greater mil values.
R value is used in the united states.
Pvc roofs are specifically engineered for strength ensuring the membrane s long service life.
Pattern with perimeter sheets attached 6 o c.
The membrane is attached using 12 o c.
