Spray Foam Insulation R Value Comparison

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.

Spray foam insulation r value comparison.

Homes generally try and reach an r value of 38 with their insulation. Focusing on spray foam insulation materials there is a difference between the two main types. As a benchmark one inch of solid wood has an r value of 1. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

Closed cell spray foam r values. 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. Quick comparisons and installation tips. Why spray foam insulation is so effective in meeting code requirements is that it has a higher r value per inch of product used than batts.

Products with a higher r value provide greater insulation. You can use the small pressurized cans of foam. Insulate rim joists and other large areas with this product meant for big jobs. Foam in place insulation can be blown into walls on attic surfaces or under floors to insulate and reduce air leakage.

For 6 inches r 15 or r 19 etc. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. The cost of spray foam insulation vs fiberglass is higher if you choose closed cell foam. Spf insulation is rarely used in thicknesses of 10 or 15 inches.

We ve included those values for the r value comparison of spray foam insulation vs fiberglass insulation. According to industry publication fine home building the r value for open cell spray foam is between r 3 5 r 3 6 per inch. Eco spray foam insulation. Some installations can yield a higher r value than traditional batt insulation for the same thickness and can fill even the smallest cavities creating an effective air barrier.

Average cost of spray foam vs fiberglass insulation one board foot 12 x 12 x 1 of open cell foam insulation averages 0 45 to 0 80 cents the same amount of closed cell insulation costs between 1 and 2 a square foot of fiberglass costs between 1 30 and 3 50 on average. Traditional insulation comparison compare spray foam to traditional types of insulation icynene spray foam expands 100 times its original size to fills cracks and crevices stopping air leaks. The closed cell spray foam stops air infiltration and provides about an r 5 per inch. However there are open cell spray foam insulation products actually offer r 3 7 per inch such as icynene classic and.

Home homeowners how spray foam saves money spray foam vs. Made with plant based products such as soy eco spray foam is more eco friendly. A higher r value prevents more heat from escaping through the insulation. The common denominator among varieties of insulation is the r value.