Closed Cell Foam Insulation R Value

Just like for open cell foam r values are additive.

Closed cell foam insulation 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. A foams r value is its resistance to heat flow or in other words how well they insulate. Two inches of closed cell foam will provide r12 r14 of insulation. Most spray polyurethane foam is called two component foam.

For example if a 2 4 wall has 3 in. Of closed cell foam insulation the r value of the studs is based on a stud depth of 3 in not 3 1 2 in. R matte plus 3 thermasheath 3 is rigid foam plastic thermal insulation r matte plus 3 thermasheath 3 is rigid foam plastic thermal insulation board. For example if a 2 4 wall has 3 in.

Closed cell foam has a higher r value than open cell foam usually about 6 0 per inch. 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 provides a higher r value per inch 6 5 than less expensive insulation types like cellulose and fiberglass 3 5 to 3 7. Of closed cell foam insulation the r value of the studs is based on a stud depth of 3 in not 3 1 2 in.

Closed cell spray foams are between 2 and 4 lbs. 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 foam can be over three times that with a density of 1 75 pounds per cubic foot or more. 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.

It has a lower r value per inch than closed cell foam and is vapor permeable. With foamed in place insulation it is relatively easy though not inexpensive to fill wall and ceiling cavities completely. Closed cell spray foam insulation. It s made of environmentally sound closed cell polyisocyanurate foam bonded to a durable white matte non glare aluminum facer and a reflective reinforced aluminum facer.

The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. Closed cell spray foam r values. The open cell structure of low density foam insulation means the r value is lower than its closed cell counterpart. For 6 inches r 15 or r 19 etc.

Because the exposed portions of the studs are basically indoors and not part of the insulated wall assembly. Nevertheless open cell spray foam does offer superior and consistent thermal insulation and air sealing properties. 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. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch.

In regards to closed cell sprayed in foam insulation r value can range between r 4 9 to r 7 1 per inch.