Open Cell Insulation R Value

Closed cell foam has a higher r value than open cell foam usually about 6 0 per inch.

Open cell insulation r value. To understand why we need to start by understanding the trimmability of cured foam. R values are additive so you can multiple the number of inches of insulation thickness times the r value to arrive at a total insulation value. Closed cell open cell spray foam r values. As a project manager for a spray foam company for years i can tell you that we offer 0 5 lb.

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. There isn t much difference in whole wall r value between a wall insulated with open cell spray foam and one insulated with closed cell spray foam. What really matters is the r value of the whole wall not just that of the insulation. Open cell foam for less the same cost as you quoted the 0 5 lb.

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. Open cell spray foams are between 5 and 1 lbs per cubic foot and have an r value of 3 0 4 0 per inch of insulation. Open cell foam has an r value of almost 5. We even offer a 1 0 lb.

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. Open cell foam at around 25 board foot. A foams r value is its resistance to heat flow or in other words how well they insulate. The open cell structure of low density foam insulation means the r value is lower than its closed cell counterpart.

R value is an important insulation term about measurement. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. It measures the effectiveness at stopping energy loss by way of conduction one of the 3 forms of energy transfer. 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.

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. A typical 2 4 stud filled with open cell spray foam will have an r value.