Open Cell Spray Foam R Value Chart

Both closed cell spray foam and open cell spray foam insulation can be used effectively in commercial building designs to allow the building to achieve energy efficiency and consistent performance.

Open cell spray foam r value chart.

The r value your insulation needs depends on your local climate. Two inches of closed cell foam will provide r12 r14 of insulation. It performs much better than any form of batt for stopping air flow but it is not as complete of an air seal as closed cell spray foam. 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.

When applied on the interior open cell spray insulation provides performance advantages that differ from those of closed cell spray foam used on the exterior. The map above shows each region of the u s. It has a lower r value per inch than closed cell foam and is vapor permeable. 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.

The r value for open cell is typically around 3 7 at 1 thick and varies by manufacture. Use the following chart to estimate an ideal r value for your insulation project. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. 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. Closed cell spray foams are between 2 and 4 lbs. Just like for open cell foam r values are additive. Once you find your home s zone on this map you can use the below insulation r value chart to determine the minimum r value your insulation should have.

Open cell spray foam typically has an r value of 3 5 per inch and it should be noted that open cell does not form a tight air seal. They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts. 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. Open cell spray foam r values.