Polyurethane Spray Foam Insulation R Value

It is spray applied to a substrate and typically expands about 150 times its original volume to form a semi rigid flexible non structural plastic insulation.

Polyurethane spray foam insulation r value.

The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. Expect an r value of about 3 6 per inch. 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. Johns manville corbond iii closed cell spray polyurethane foam insulation offers and r value of r 7 per inch and can be applied in a single pass to a maximum of 3 5 inches providing superior thermal performance with seamless air sealing and moisture control in a single step.

The bottom line is that spray polyurethane foam is better than any other type of insulation for reducing air leakage. Closed cell spray foam r values. Polyisocyanurate polyurethane foam insulation r values. Insulation or other building material 9.

Spray polyurethane foam comes in a range of densities and cell structure. For 6 inches r 15 or r 19 etc. Polyurethane is a closed cell. Higher r value greater than 6 0 per inch r value approximately 3 5 per inch.

Open cell foam is permeable to moisture but impermeable to air. Open cell spray polyurethane foam also sometimes referred to as low density or 1 2 pound spf weighs between 0 4 and 0 6 pounds cubic foot when fully cured. Spray polyurethane foam spf basics. 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.

By expanding 100 times its original size icynene seals cracks and gaps in attics walls ceilings and other spaces where air might escape. 1 8 2 pound polyurethane foam has the highest r value of readily available spray foam insulation used in homes and buildings. Aging effects comments. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch.

With high yield and excellent adhesion it s an. What is spf how does it work. Low density foams are referred to as open cell spf while higher density foams are referred to as closed cell foam. It has a lower r value per inch than closed cell foam and is vapor permeable.

Icynene sprayed in foam is an insulation and air seal system that works to help ensure that your home doesn t suffer from air loss while providing an effective r value. Thanks to thanks to andrew cole for correcting our data on this product. Multiple immediate passes with no wait time may also be applied. However because spray foam must be mixed on site and applied while wearing special protective clothing you must leave installation to the professionals.

There are two types of polyurethane spray foam insulation.