Closed Cell Spray Foam R Value Chart

The r value for open cell is typically around 3 7 at 1 thick and varies by manufacture.

Closed cell spray foam r value chart.

Closed cell spray foam insulation. 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. 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. Just like for open cell foam r values are additive.

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. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. Closed cell foam r6 r8. 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.

Two inches of closed cell foam will provide r12 r14 of insulation. Closed cell spray foam r values. For 6 inches r 15 or r 19 etc. 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.

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. They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts. 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. It has a lower r value per inch than closed cell foam and is vapor permeable.