Closed Cell Spray Foam Insulation R Value Chart

Two inches of closed cell foam will provide r12 r14 of insulation.

Closed cell spray foam insulation r value chart. 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. The r value for closed cell is typically around 6 7 at 1. Closed cell spray foams are between 2 and 4 lbs. The common denominator among varieties of insulation is the r value.

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. 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. The r value for open cell is typically around 3 7 at 1 thick and varies by manufacture.

Contractors often use it to insulate under slabs ceilings walls and roofs. Just like for open cell foam r values are additive. 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. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another.

Use the following chart to estimate an ideal r value for your insulation project. All these have r values ranging from r 3 2 to r 3 8 per inch. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch.

As a benchmark one inch of solid wood has an r value of 1. 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. The r value of closed cell foam is r 6 5 7 per inch.