Closed Cell Spray Foam Insulation R Value Chart

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 spray foam insulation r value chart.

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. Just like for open cell foam r values are additive. The common denominator among varieties of insulation is the r 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 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. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. 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.

They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts. 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 value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. The r value for open cell is typically around 3 7 at 1 thick and varies by manufacture.

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. The r value for closed cell is typically around 6 7 at 1. All these have r values ranging from r 3 2 to r 3 8 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. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. Closed cell spray foams are between 2 and 4 lbs.