Spray Foam Insulation R Value Comparison

In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and.

Spray foam insulation r value comparison.

For 6 inches r 15 or r 19 etc. These r values are a sum meaning this should be the total r value once you add up the entire depth of 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. The cost of spray foam insulation vs fiberglass is higher if you choose closed cell foam.

Products with a higher r value provide greater insulation. The closed cell spray foam stops air infiltration and provides about an r 5 per inch. Insulate rim joists and other large areas with this product meant for big jobs. You can use the small pressurized cans of foam.

Compare spray foam vs fiberglass insulation costs summary. Home homeowners how spray foam saves money spray foam vs. Foam in place insulation can be blown into walls on attic surfaces or under floors to insulate and reduce air leakage. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch.

Focusing on spray foam insulation materials there is a difference between the two main types. Quick comparisons and installation tips. Eco spray foam insulation. 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.

Homes generally try and reach an r value of 38 with their insulation. 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. Closed cell spray foam r values. We ve included those values for the r value comparison of spray foam insulation vs fiberglass insulation.

Spf insulation is rarely used in thicknesses of 10 or 15 inches. 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 common denominator among varieties of insulation is the r value. 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.

Made with plant based products such as soy eco spray foam is more eco friendly. As a benchmark one inch of solid wood has an r value of 1. However there are open cell spray foam insulation products actually offer r 3 7 per inch such as icynene classic and. A higher r value prevents more heat from escaping through the insulation.