Closed Cell Spray Foam Insulation R Value Chart

It measures the effectiveness at stopping energy loss by way of conduction one of the 3 forms of energy transfer.

Closed cell spray foam insulation r value chart.

The closed cell spray foam stops air infiltration and provides about an r 5 per inch. Just like for open cell foam r values are additive. 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. Closed cell spray foams are between 2 and 4 lbs.

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. Two inches of closed cell foam will provide r12 r14 of insulation. They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts. R value is an important insulation term about measurement.

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. 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. The common denominator among varieties of insulation is the r value. 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.

Products with a higher r value provide greater insulation. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. 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. 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.

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 insulation. Closed cell open cell spray foam r values. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and.

Insulate rim joists and other large areas with this product meant for big jobs. Most spray polyurethane foam is called two component foam. With foamed in place insulation it is relatively easy though not inexpensive to fill wall and ceiling cavities completely. As a benchmark one inch of solid wood has an r value of 1.

It has a lower r value per inch than closed cell foam and is vapor permeable. Made with plant based products such as soy eco spray foam is more eco friendly. The r value for closed cell is typically around 6 7 at 1 thick and varies by manufacturer. Use the following chart to estimate an ideal r value for your insulation project.