Closed Cell Spray Foam Insulation R Value Chart

The common denominator among varieties of insulation is the r value.

Closed cell spray foam insulation r value chart.

Just like for open cell foam r values are additive. Use the following chart to estimate an ideal r value for your insulation project. The r value of closed cell foam is r 6 5 7 per inch. The r value for open cell is typically around 3 7 at 1 thick and varies by manufacture.

All these have r values ranging from r 3 2 to r 3 8 per inch. 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. Contractors often use it to insulate under slabs ceilings walls and roofs. They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts.

In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. Closed cell spray foam insulation is vapor and air impermeable and is applied with a minimum of 2 on average with use on on interior and exterior building applications. 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. As always should you have any questions or require any assistance in planning your spray foam insulation job please contact us we are always happy to help.

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 cavity would be r 24 5. The r value for closed cell is typically around 6 7 at 1. As a benchmark one inch of solid wood has an r value of 1. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch.

Open cell spray foam insulation is air impermeable and is applied with a minimum of 3 5 on average and can be used for attics interior floors walls and soundproofing. Closed cell spray foams are between 2 and 4 lbs. Two inches of closed cell foam will provide r12 r14 of insulation.