Open Cell Foam R Value Chart

They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts.

Open cell foam r value chart. Closed cell spray foams are between 2 and 4 lbs. 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. 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. Foam insulation densities vary among closed cell vs open cell forms.

Rmax r matte plus 3 1 2 in. Closed cell open cell spray foam r values. 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. 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 eps is the cheapest and least used foam board product on the market. 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. It measures the effectiveness at stopping energy loss by way of conduction one of the 3 forms of energy transfer. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13.

As a benchmark one inch of solid wood has an r value of 1. Two inches of closed cell foam will provide r12 r14 of insulation. 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. Closed cell polystyrene spray foam 1 inch thick 6 5.

Expanded polystyrene foam board. Closed cell foams are more dense and rigid typically about 2 lb cu. Open cell polyurethane spray foam 3 5 inches thick 12 6. Open cell foams are typically about 1 2 lb cubic foot.

C or thermal conductance of these materials is the reciprocal of the r value. R value is an important insulation term about measurement. 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. R value is the only measurement used in building codes today however it is not the only way to stop energy loss.

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. This product typically has an r value of 3 6 to 4 0 per inch of thickness. 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.