Spray Foam Insulation R Value Chart

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.

Spray foam insulation r value chart.

Rigid foam boards trap air or another gas to resist conductive heat flow. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. Spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r value in just 1 inch. 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.

Closed cell spray foam insulation. Choose foam it green spray foam insulation kits and don t settle for less than you deserve. 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. Homes generally try and reach an r value of 38 with their insulation.

Use the following chart to estimate an ideal r value for your insulation project. It has a lower r value per inch than closed cell foam and is vapor permeable. Products with a higher r value provide greater insulation. Eco spray foam insulation.

Insulate rim joists and other large areas with this product meant for big jobs. A higher r value prevents more heat from escaping through the insulation. 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.

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. 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. As a benchmark one inch of solid wood has an r value of 1. 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.

Bulky materials resist conductive and to a lesser degree convective heat flow in a building cavity. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. 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. 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.

Open cell foam insulation values r3 r4. Made with plant based products such as soy eco spray foam is more eco friendly.