Spray Foam Insulation R Value Chart

Products with a higher r value provide greater insulation.

Spray foam insulation r value chart.

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. Homes generally try and reach an r value of 38 with their insulation. Open cell spray foams are between 5 and 1 lbs per cubic foot and have an r value of 3 0 4 0 per inch of insulation. Find your zone on the map and then use the above insulation r value chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.

The r value of spray foam insulation is approximately 6 per inch so those using spray foam as their insulator will need about 6 3 inches of thickness to reach r 38. If you d like to start saving money and time today buy foam it green spray foam insulation now or call us at 800 516 0949. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. The closed cell spray foam stops air infiltration and provides about an r 5 per inch.

As a benchmark one inch of solid wood has an r value of 1. Use the following chart to estimate an ideal r value for your insulation project. Traditional insulation such as cellulose or fiberglass is not comparable to spray foam insulation in r value as those insulation methods use r value of heat transfer. Spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r value in just 1 inch.

Choose foam it green spray foam insulation kits and don t settle for less than you deserve. Made with plant based products such as soy eco spray foam is more eco friendly. Open cell foam insulation values r3 r4. Closed cell spray foam insulation.

Bulky materials resist conductive and to a lesser degree convective heat flow in a building cavity. A higher r value prevents more heat from escaping through the insulation. Insulate rim joists and other large areas with this product meant for big jobs. It has a lower r value per inch than closed cell foam and is vapor permeable.

Eco spray foam insulation. Rigid foam boards trap air or another gas to resist conductive heat flow. Insulation materials run the gamut from bulky fiber materials such as fiberglass rock and slag wool cellulose and natural fibers to rigid foam boards to sleek foils. 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.

R values are additive so you can multiple the number of inches of insulation thickness times the r value to arrive at a total insulation value. Open cell spray foam insulation is air impermeable and is applied with a minimum of 3 5 on average and can be used for attics interior floors walls and soundproofing.