Closed Cell Spray Foam R Value Chart

For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch.

Closed cell spray foam r value chart.

If you want to install spray foam in a stud wall and price is no object then it would seem to make sense to specify closed cell spray foam right. The r value for closed cell is typically around 6 7 at 1 thick and varies by. Open cell spray foam has an r value of about r 3 7 per inch while closed cell spray foam has an r value that may be as high as r 6 5 per inch. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13.

Just like for open cell foam r values are additive. 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. Closed cell spray foam insulation is vapor and air impermeable and is applied with a minimum of 2 on average with use on on interior and exterior building applications. 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 insulation. Closed cell spray foam r values. For 6 inches r 15 or r 19 etc. They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts.

It has a lower r value per inch than closed cell foam and is vapor permeable. Two inches of closed cell foam will provide r12 r14 of insulation. Closed cell foam r6 r8. Open cell spray foam has an r value of about r 3 7 per inch while closed cell spray foam has an r value that may be as high as r 6 5 per inch.