Closed Cell Spray Foam Insulation R Value Chart

R value is an important insulation term about measurement.

Closed cell spray foam insulation r value chart.

Closed cell open cell spray foam r values. 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. As a benchmark one inch of solid wood has an r value of 1. 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.

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. 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 foam r6 r8. 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. 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. It measures the effectiveness at stopping energy loss by way of conduction one of the 3 forms of energy transfer. It has a lower r value per inch than closed cell foam and is vapor permeable.

Just like for open cell foam r values are additive. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. Closed cell spray foam insulation. Use the following chart to estimate an ideal r value for your insulation project.

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. The r value for closed cell is typically around 6 7 at 1 thick and varies by manufacturer.