Closed Cell Foam 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.

Closed cell foam insulation r value per inch.

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. Closed cell spray foam insulation. 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. 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 foam insulation values r3 r4. 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. Most spray polyurethane foam is called two component foam. All these have r values ranging from r 3 2 to r 3 8 per inch.

The r value of. 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 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 spray foam has a far better r value per inch than other less effective insulations like cellulose fiberglass or even open cell foam.

With foamed in place insulation it is relatively easy though not inexpensive to fill wall and ceiling cavities completely.