Gaf analyzed membrane samples from roofs across the us and studied thickness over scrim surface cracking and the ability to repair aging tpo membranes.
Tpo roof membrane r value.
These standards define cool roofs in california to have a minimum three year aged reflectance of 0 55 and a minimum thermal emittance of 0 75 for low sloped nonresidential buildings.
Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials.
Foot commercial roof it will usually cost between 3 50 and 7 50 per square foot in materials and labor to install a typical single ply membrane commercial roofing system.
Tpo roofing costs for an average 20 000 sq.
R value of various materials.
This is equivalent to 8 000 10 800 keep in mind that your total cost may be higher or lower depending on a number of important factors including.
Roofing m em brane provides the benefits of all three m aterials.
As demand increases for heat reflective and energy efficient roofing systems you can rely on tpo single ply roofing membranes to.
Polyiso is a great choice for insulation due to its price and performance and with an r value of 5 5 you would need to install almost 6 inches to hit.
You should of course see the manufacturer provided technical data sheet for the r value of specific products.
A single ply roofing system tpo or epdm has a 0 24 0 33 r value with a typical installed thickness level therefore you ll need considerable thickness of insulation to get you to an r 30.
Always check with your local code authority.
Underneath the membrane there is usually a separation barrier and or some sort of insulation board.
Across the us homeowners who installed a tpo roof membrane report spending about 5 6 75 per square foot.
White and tan ultraply tpo membranes are listed with the cool roof rating council crrc.
Geographic location more expensive areas will have overall higher labor.
Here s a video of the west roofing systems team installing a tpo single ply membrane roofing system.
For a very good introductory overview article on r value see r values over at the website of.
Both types have an r value ranging from 4 r to 6 r per 1 inch of insulation thickness.
Thermoplastic polyolefin tpo single ply roofing membranes are among the fastest growing commercial roofing products and have gained praise across the industry for their many performance and installation advantages.
Dim ensions and w idths are nom inal values and are subject to norm al m anufacturing packaging tolerance and variation c olors f u ll r oll s ize f u ll r oll w eigh t h alf r oll s ize h alf r oll w eigh t.
A recent study of everguard tpo roofs installed between 8 and 16 years ago found they all performed above astm standards for newly manufactured tpo.
Most common insulation is iso or eps foam board.
Please note that the r values for roof membranes shingles tiles air films and roof deck materials might or might not be permitted by your local code to be included when total roof assembly r value is being calculated for the purpose of satisfying energy code requirements.
