Spray Foam Roofing R Value

Nevertheless open cell spray foam does offer superior and consistent thermal insulation and air sealing properties.

Spray foam roofing r value.

Walking on the hard and durable foam roof surface feels somewhat like walking on a concrete sidewalk. A spray foam roofing system has an r value of 6 6 per sq. Wind uplift tests performed by ul have shown that polyurethane foam actually enhances the wind uplift resistance of the substrate. Generally foam is sprayed to a depth of 1 to 1 5 inches.

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. In regards to closed cell sprayed in foam insulation r value can range between r 4 9 to r 7 1 per inch. The foam never gets touched and never loses r value. Tillotson provides maintenance and protection in spray on roofing spray foam insulation concrete leveling foundation repair and water proofing.

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. Closed cell spray foam r values. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. For 6 inches r 15 or r 19 etc.

Foam roofing provides green solutions for building sustainability and energy use reduction. Most of the time spray foam can be directly applied to existing roofing systems but in some cases a polyiso board is needed. 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 offers better insulation properties than any other roofing system on the market.

A spray foam roof can be the last roofing system you ll ever need on a building. 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. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. Schedule a no obligation inspection today.

Closed cell spray foam insulation. 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. At year 10 20 a contractor will add more coating and granules. It has a lower r value per inch than closed cell foam and is vapor permeable.

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. A typical 2 4 stud filled with open cell spray foam will have an r value between 10 5 and 14.