Open Cell Spray Foam 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.

Open cell spray foam r value per inch.

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. Comparing fiberglass to foam fiberglass is the less expensive choice for wall insulation and is the spray foam insulation rental industrial spray foam insulation jun 12 2017. 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 typically has an r value of 3 5 per inch and it should be noted that open cell does not form a tight air seal. 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 insulation values r3 r4. 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.

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. If you want to install spray foam in a stud wall and price is no object then it would seem. Open cell spray foam r values. 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.

All these have r values ranging from r 3 2 to r 3 8 per inch.