For a very good introductory overview article on r value see r values over at the website of.
Pvc roofing r value.
R value is used in the united states.
Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials.
Both of these insulation boards carry an r value that ranges from 4 r to 6 r per 1 inch of insulation thickness.
Modified bitumen are asphalt roofs with a rubber like look and feel.
To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826.
This also means easy hoisting staging and maneuvering around the roof.
Built up roof is your standard tar and gravel flat roofing system which is a very low cost and somewhat dated kind of roof.
Easy three step installation to reduce the chance of application errors.
Then you will want a higher r value in your roofing insulation and roofing materials.
High r value 2 5 r.
Heat welded seams for greater reliability.
Rsi r value système international is the metric equivalent.
Most commonly used insulation is iso or eps foam board.
You should of course see the manufacturer provided technical data sheet for the r value of specific products.
Additional r value for a masonry wall constructed using these materials needs to add the insulating value of additional wall components typically included such as 1 solid foam polyisocyanurate r 8 extruded polystyrene r 5 expanded polystyrene r 4 or 1 of perlite r 2 7 and for an exterior air film winter no wind r 0 17 an interior air film again no air movement r 0 68 3 4 of.
Provides significantly more thermal insulation r value than wood fiber or gypsum boards.
For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1.
Both types have an r value ranging from 4 r to 6 r per 1 inch of insulation thickness.
The following table is in metric form.
Tpo roofing and single ply pvc roofing.
Prior to installing the pvc roofing membrane itself typically some type of insulation board is put in.
To convert rsi to r value multiply the rsi by 5 67826.
High reflectivity for greater energy savings.
Pvc polyvinyl chloride a thermoplastic membrane utilizing a reinforcement scrim between the two plies of equal thickness ib roof only.
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.
Guarantees are available up to 20 years when using everguard pvc 60 mil membrane.
R value of various materials.
Click here to go to our calculator to understand the real r value of a ceiling system or wall system with gaps in the insulation.
Increased chemical resistance compared to other roofing technologies.
