Spray Foam Insulation R Values Per Inch

Closed cell spray foam insulation.

Spray foam insulation r values per inch.

Icynene classic ld c 50 has an r value of 3 7 per inch. That means if you used foam it green closed cell which is r 7 per inch it s r value for a 3 5 deep wall. 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 focusing on spray foam insulation materials there is a difference. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch.

Closed cell spray foam is the most expensive residential insulation available. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. Icynene classic max has an r value of 3 7 per inch. Icynene md r 200 has an r value of 5 2 per inch.

R value is determined from a controlled laboratory test of an insulation s resistance to conductive heat flow. 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. 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 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 values spray with an r value of 3 5 per inch per inch of thickness. Icynene md c 200 has an r value of 6 75 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. All these have r values ranging from r 3 2 to r 3 8 per inch.