Open Cell Foam R Value Chart

Closed cell spray foam insulation 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.

Open cell foam r value chart.

Closed cell polystyrene spray foam 1 inch thick 6 5. Closed cell spray foams are between 2 and 4 lbs. As a benchmark one inch of solid wood has an r value of 1. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.

The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. 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. 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. Just like for open cell foam r values are additive.

This product typically has an r value of 3 6 to 4 0 per inch of thickness. Open cell foams are typically about 1 2 lb cubic foot. 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. Open cell polyurethane spray foam 3 5 inches thick 12 6.

Foam insulation densities vary among closed cell vs open cell forms. It measures the effectiveness at stopping energy loss by way of conduction one of the 3 forms of energy transfer. It s made of environmentally sound closed cell polyisocyanurate foam bonded to a durable white matte non glare aluminum facer and a reflective reinforced aluminum facer. Closed cell foams are more dense and rigid typically about 2 lb cu.

They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts. R 3 2 polyisocyanurate rigid foam insulation board r matte plus 3 thermasheath 3 is rigid foam r matte plus 3 thermasheath 3 is rigid foam plastic thermal insulation board. Expanded polystyrene foam board. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market.

Rmax r matte plus 3 1 2 in. I also recommend you read a recent article about open cell vs closed cell foam products to understand the differences between the two product types. 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. R value is an important insulation term about measurement.

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. R value is the only measurement used in building codes today however it is not the only way to stop energy loss. Two inches of closed cell foam will provide r12 r14 of insulation.