Closed Cell Spray Foam Insulation R Value Chart

The r value for closed cell is typically around 6 7 at 1.

Closed cell spray foam insulation r value chart.

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. Contractors often use it to insulate under slabs ceilings walls and roofs. 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 common denominator among varieties of insulation is the r value.

For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. 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. Closed cell spray foams are between 2 and 4 lbs. 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. 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. Two inches of closed cell foam will provide r12 r14 of insulation. Use the following chart to estimate an ideal r value for your insulation project.

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. 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. They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts.

Just like for open cell foam r values are additive. 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. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another.