Closed Cell Foam R Value
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 foam r value. Closed cell spray foam insulation. 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. But some closed cell foams like tiger foam s e84 closed cell formula have even higher ratings that go up to almost 7 per inch. For 6 inches r 15 or r 19 etc.
Closed cell spray foams are between 2 and 4 lbs. Polyurethane rigid foam is a closed cell insulation which. They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts. Two inches of closed cell foam will provide r12 r14 of insulation.
Closed cell foam has a higher r value than open cell foam usually about 6 0 per inch. 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. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. When applied on the interior open cell spray insulation provides performance advantages that differ from those of closed cell spray foam used on the exterior.
The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. One option is to use polyurethane rigid foam insulation. Both closed cell spray foam and open cell spray foam insulation can be used effectively in commercial building designs to allow the building to achieve energy efficiency and consistent performance. It has a lower r value per inch than closed cell foam and is vapor permeable.
Just like for open cell foam r values are additive. This higher rating makes closed cell foam better at keeping heat in or out of a structure. 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 r values.
It is available with r values ranging from r 18 to r 28 at a 3 inch thickness.