Open Cell Spray Foam R Value Chart

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 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. 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 map above shows each region of the u s. Just like for open cell foam r values are additive.

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. 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. 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.

Why r value is not as critical you paring insulation types insulation r value chart marine grade foam sheets closed cellwhat is the highest r value insulation ratings types chartsclosed cell spray foam iowaopen cell spray foam iowatiger foam spray insulation r value chartremodeling an insulation r value chart is only the firstopen cell vs read more. They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts. And the department of energy s corresponding climate zone. Two inches of closed cell foam will provide r12 r14 of insulation.

The r value for open cell is typically around 3 7 at 1 thick and varies by manufacture. Closed cell spray foams are between 2 and 4 lbs. It has a lower r value per inch than closed cell foam and is vapor permeable. Closed cell spray foam insulation.

Open cell spray foam r values. 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. 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.