With foamed in place insulation it is relatively easy though not inexpensive to fill wall and ceiling cavities completely.
Closed cell spray insulation r value 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.
Just like for open cell foam r values are additive.
Closed cell spray foam provides a higher r value per inch 6 5 than less expensive insulation types like cellulose and fiberglass 3 5 to 3 7.
They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts.
The r value of closed cell foam is r 6 5 7 per inch.
For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch.
Installing quality insulation is the best thing you can do to improve the energy e closed cell foam r values spray with an r value of 3 5 per inch per inch of thickness.
Contractors often use it to insulate under slabs ceilings walls and roofs.
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 foams are between 2 and 4 lbs.
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.
Two inches of closed cell foam will provide r12 r14 of insulation.
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 cavity would be r 24 5.
Spray polyurethane foam spf is better than any other type of insulation at reducing air leakage.