Open Cell Insulation R Value

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.

Open cell insulation r value.

It measures the effectiveness at stopping energy loss by way of conduction one of the 3 forms of energy transfer. The open cell structure of low density foam insulation means the r value is lower than its closed cell counterpart. What really matters is the r value of the whole wall not just that of the insulation. Open cell foam at around 25 board foot.

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. Nevertheless open cell spray foam does offer superior and consistent thermal insulation and air sealing properties. A foams r value is its resistance to heat flow or in other words how well they insulate. Closed cell open cell spray foam r values.

Open cell foam for less the same cost as you quoted the 0 5 lb. 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. Closed cell foam has a higher r value than open cell foam usually about 6 0 per inch. We even offer a 1 0 lb.

The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. 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. A typical 2 4 stud filled with open cell spray foam will have an r value. 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.

To understand why we need to start by understanding the trimmability of cured foam. As a project manager for a spray foam company for years i can tell you that we offer 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. 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.

Open cell foam has an r value of almost 5. In regards to closed cell sprayed in foam insulation r value can range between r 4 9 to r 7 1 per inch.