Foam Insulation R Value Chart

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.

Foam insulation r value chart.

The common denominator among varieties of insulation is the r value. 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 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. 4 8 7 21.

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. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. There are three basic foam insulation board products on the. Because of this i often get questions about which type of foam board insulation to use and what r values these products provide.

As a benchmark one inch of solid wood has an r value of 1. The table below shows what levels of insulation are cost effective for different climates and. 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. Corrosion problems when in contact with steel roofing moisture.

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. R value is an important insulation term about measurement. It measures the effectiveness at stopping energy loss by way of conduction one of the 3 forms of energy transfer.

The higher the r value the better the thermal performance of the insulation. Foam board insulation types. Phenolic foam spray insulation. R value is the only measurement used in building codes today however it is not the only way to stop energy loss.

Very good air bypass leak sealing properties. Closed cell open cell spray foam r values. R value is a measure of insulation s ability to resist heat traveling through it. It has a lower r value per inch than closed cell foam and is vapor permeable.

R 0 77 30 phenolic foam insulation r values. Recommended home insulation r values. Use the following chart to estimate an ideal r value for your insulation project. 8 3 4 4 8 2 20.

Installing more insulation in your home increases the r value and the resistance to heat flow. When calculating the r value of a multilayered installation add the r values of the individual layers. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. The r value of some insulations also depends on temperature aging and moisture accumulation.

Insulation level are specified by r value. Rmax r matte plus 3 1 2 in.