Foam Insulation R Value Chart

R 0 77 30 phenolic foam insulation r values.

Foam insulation r value chart.

4 8 7 21. 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. R value is the only measurement used in building codes today however it is not the only way to stop energy loss. Insulation level are specified by r value.

The common denominator among varieties of insulation is the r value. Closed cell spray foam insulation. Very good air bypass leak sealing properties. When calculating the r value of a multilayered installation add the r values of the individual layers.

8 3 4 4 8 2 20. R value is a measure of insulation s ability to resist heat traveling through it. Use the following chart to estimate an ideal r value for your insulation project. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.

The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. 4 5 21. Corrosion problems when in contact with steel roofing moisture. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and.

I ve written several posts about how to insulation basement walls in which i promote the use of foam board insulation as the first line of defense against moisture and mold. The r value of some insulations also depends on temperature aging and moisture accumulation. 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. As a benchmark one inch of solid wood has an r value of 1.

Phenolic foam spray insulation. The higher the r value the better the thermal performance of the insulation. It has a lower r value per inch than closed cell foam and is vapor permeable. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

Rmax r matte plus 3 1 2 in. Recommended home insulation r values. Because of this i often get questions about which type of foam board insulation to use and what r values these products provide. 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.

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. It measures the effectiveness at stopping energy loss by way of conduction one of the 3 forms of energy transfer. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. There are three basic foam insulation board products on the.

Foam board insulation types. R value is an important insulation term about measurement.