Spray Foam Roofing R Value

Closed cell spray foam has a far better r value per inch than other less effective insulations like cellulose fiberglass or even open cell foam.

Spray foam roofing r value.

For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. A spray foam roofing system has an r value of 6 6 per sq. Why spray foam insulation is so effective in meeting code requirements is that it has a higher r value per inch of product used than batts. Closed cell spray foam r values.

Sprayed foam has an excellent r value and generally 1 of foam represents about 4 of fiberglass in terms of insulation. Since a spray foam system consists of spray foam coating and granules after 10 20 years some of the coating and granules will naturally wear away. Spray polyurethane foam roofing has the highest rated insulation r value available. The foam never gets touched and never loses r value.

If you install 2 inches of iso board r 11 and 3 inches of spray foam r 19 8 you ll be over an r 30. A typical 2 4 stud filled with open cell spray foam will have an r value between 10 5 and 14. R values are additive so you can multiple the number of inches of insulation thickness times the r value to arrive at a total insulation value. Foam roofing provides green solutions for building sustainability and energy use reduction.

In regards to closed cell sprayed in foam insulation r value can range between r 4 9 to r 7 1 per inch. Schedule a no obligation inspection today. Tillotson provides maintenance and protection in spray on roofing spray foam insulation concrete leveling foundation repair and water proofing. Thanks to spray foam s properties that allow it to be spray applied as long as you can get your equipment on or near the roof you can install a spray foam roof.

Spray foam offers better insulation properties than any other roofing system on the market. Closed cell spray foam insulation. The open cell structure of low density foam insulation means the r value is lower than its closed cell counterpart. For 6 inches r 15 or r 19 etc.

Walking on the hard and durable foam roof surface feels somewhat like walking on a concrete sidewalk. A spray foam roof can be the last roofing system you ll ever need on a building. Most of the time spray foam can be directly applied to existing roofing systems but in some cases a polyiso board is needed. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13.

Generally foam is sprayed to a depth of 1 to 1 5 inches. Nevertheless open cell spray foam does offer superior and consistent thermal insulation and air sealing properties.