Closed Cell Spray Foam R Value Chart

Thanks to thanks to andrew cole for correcting our data on this product.

Closed cell spray foam r value chart. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. 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. Closed cell spray foams provide a higher r value per inch than less expensive insulation types like fiberglass cellulose or open cell foam all of which have r values of r 3 2 to r 3 8 per in. The r value for open cell is typically around 3 7 at 1 thick and varies by manufacture.

Polyurethane spray closed cell foam insulation. 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. 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.

In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7. Contractors often use it to insulate under slabs ceilings walls and roofs. Note that some commercial and industrial buildings may require higher r values always check with local building code inspectors. 0 12 shrinkage fire safety.

They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts. 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. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. 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.

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. May not be left exposed in living area. Use the following chart to estimate an ideal r value for your insulation project. Initial 7 14 aged 6 8.

Closed cell spray foam is the most expensive residential insulation available. Our r value guide to rigid insulation includes the doe s recommended insulation by zone chart r value calculator and base building material r values chart. Two inches of closed cell foam will provide r12 r14 of insulation. 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.

Just like for open cell foam r values are additive. Closed cell foam spray insulation. Closed cell foam r6 r8. Closed cell polystyrene spray foam 1 inch thick 6 5.

Open cell polyurethane spray foam 3 5 inches thick 12 6. Expanded polystyrene foam board. All these have r values ranging from r 3 2 to r 3 8 per inch. The r value for closed cell is typically around 6 7 at 1 thick and varies by manufacturer.