Closed Cell Polyurethane Foam R Value

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.

Closed cell polyurethane foam r value.

Icynene sprayed in foam insulation is able to provide a high code compliant r value while also air sealing your home. The r value of closed cell foam is r 6 5 7 per inch. Initial 7 14 aged 6 8. That means if you used foam it green closed cell which is r 7 per inch it s r value for a 3 5 deep wall cavity would be r 24 5.

To produce closed cell requires the use of an a component iso and a blended b component resin which contains zero ozone depleting blowing agents catalysts polyols and fire retarding materials. 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. They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts. Closed cell spray foams are between 2 and 4 lbs.

Two inches of closed cell foam will provide r12 r14 of insulation. Polyisocyanurate polyurethane foam insulation r values. Insulation or other building material 9. 5 5 6 5 21.

Polyurethane spray closed cell foam insulation. Over time around six months typically it will drop to 6 5 then stabilize and retain its still way higher than all other insulations value of 6 5 for decades. Just like for open cell foam r values are additive. If you buy too much insulation it will cost you more than what you ll save on fuel.

It provides an excellent air barrier resists moisture and retards vapor. To get the marked r value it is essential that this insulation be installed properly this can help to reduce your heating and cooling bills. Contractors often use it to insulate under slabs ceilings walls and roofs. Aging effects comments.

When first installed the r value of closed cell spray polyurethane foam is actually about 10 for a one inch thickness. Thanks to thanks to andrew cole for correcting our data on this product.