Open Cell Spray Foam R Value

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.

Open cell spray foam r value.

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. Most open cell foam has a density of about 5 pounds per cubic foot. Ft with an r value insulation factor of about 3 5 per inch.

Closed cell foam has a higher r value than open cell foam usually about 6 0. Closed cell foam can be over three times that with a density of 1 75 pounds per cubic foot or more. The r value for open cell is typically around 3 7 at 1 thick and varies by manufacture. Closed cell spray foam insulation.

Two ingredients conventionally called a and b components are mixed on site using special equipment mounted in a trailer. Closed cell foam can be made with densities as high as 1 7 to 2 0 lbs cu. Two inches of closed cell foam will provide r12 r14 of insulation. 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.

Most spray polyurethane foam is called two component foam. Closed cell spray foams are between 2 and 4 lbs. 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 r values.

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. 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. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. A foams r value is its resistance to heat flow or in other words how well they insulate.

The higher density not only allows for it to be molded for decorative or light structural uses it also provides r values of about 6 0 per inch. Open cell foam weighs between 0 4 and 0 5 lbs cu. It has a lower r value per inch than closed cell foam and is vapor permeable. Closed cell spray foam provides a higher r value per inch 6 5 than less expensive insulation types like cellulose and fiberglass 3 5 to 3 7.

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.