R Value Closed Cell Foam Per Inch

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.
R value closed cell foam per inch. Closed cell foam r6 r8. Two inches of closed cell foam will provide r12 r14 of insulation. Closed cell spray foams are between 2 and 4 lbs. Closed cell spray foams provide a higher r value per inch than less expensive insulation types like fiberglass cellulose or open cell foam all of which have r values of r 3 2 to r 3 8 per in.
Closed cell spray foam is the most expensive residential insulation available. The r value of. 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. That means if you used foam it green closed cell which is r 7 per inch it s r value for a 3 5 deep wall.
For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. Just like for open cell foam r values are additive. 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.
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 has a far better r value per inch than other less effective insulations like cellulose fiberglass or even open cell foam.