Rubber Roof Membrane R Value

You should of course see the manufacturer provided technical data sheet for the r value of specific products.

Rubber roof membrane r value.

For a 1 in thick panel. The average r value is r 5. The membrane is attached using 12 o c. You can expect to pay about 55 100 sq ft.

Extruded expanded polystyrene insulation is commonly used in inverted roof membrane assemblies irma. Pattern with perimeter sheets attached 6 o c. Eps can be used for ground contact and does not retain water over time. The amount shown is an average amount used for roof system r value calculations.

Sprayed polyurethane foam spf will have an r value of 7 14 when it is newly installed. For example while optimum performance using a black membrane the assembly must utilize insulation with an r value of 29. After it ages a few months the r value will reduce to somewhere. Smooth tpo fleece back tpo self adhered tpo tpo colors extreme tpo.

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. While expensive the best insulation is polyiso rigid foam. For a very good introductory overview article on r value see r values over at the website of. Gaf tpo roofing membranes include.

For a 1 inch board equivalent of 6 r value. Quite the contrary in colder regions ashrae zones 4 through 8. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1 93721. Expanded polystyrene eps with the highest r value per dollar eps is used for roof wall and floor insulation.

It is top quality and the most cost effective product for your flat roof. To convert rsi to r value multiply the rsi by 5 67826. For white and black membranes the table outlines the necessary adjustments in r values to maintain a roof assembly s energy performance. 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.

The average cost of extruded polystyrene insulation is 0 42 sq ft. Xps is semipermeable with a perm rating of 1. Both types have an r value ranging from 4 r to 6 r per 1 inch of insulation thickness.