Closed Cell Spray Foam Insulation R Value Chart

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

Closed cell spray foam insulation r value chart.

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 foam has a far better r value per inch than other less effective insulations like cellulose fiberglass or even open cell foam. Two inches of closed cell foam will provide r12 r14 of 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.

In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. 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. 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.

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. It has a lower r value per inch than closed cell foam and is vapor permeable. 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.

As a benchmark one inch of solid wood has an r value of 1. It measures the effectiveness at stopping energy loss by way of conduction one of the 3 forms of energy transfer. The common denominator among varieties of insulation is the r value. R value is an important insulation term about measurement.

Closed cell open cell spray foam r values. Use the following chart to estimate an ideal r value for your insulation project.