Cost Of Closed Cell Foam In Attic

Foam insulation in attic material prices.

Cost of closed cell foam in attic.

The myth that open cell is more economical is bullshit. There are two types of spray foam insulation open cell and closed cell. Open cell foams use water as a blowing agent. There is 300 difference there but the cost they give you is about a third difference and open cell foam at 12 inches will not give you the performance of 2 inches of closed.

Fiberglass batt insulation is priced by the roll or by the square foot. For closed cell insulation the average cost works out to 5 400. Foam insulation in attic costs zip code sq. From there multiply the cost of the foam.

There is an economy of scale involved so the larger the square footage the smaller the per square footage cost. Open cell spray foam costs 0 25 to 0 50 per board foot and closed cell spray foam costs 0 90 to 1 50 per board foot. Open cell foam weighs 1 2 pound per cubic foot and closed cell weighs 2 lbs per cubic foot. Closed cell foams use enovate also known as 245fa.

Open and closed cell foam insulation use a blowing agent to forms the cells within it. Closed cell spray foam insulation cost is 1 25 2 00 per board foot for the material diy. Closed cell spray foam insulation total average cost per square foot. The average total cost to have spray foam professionally installed is about 2 406 or between 1 278 and 3 677.

So if you have a 1 200 square foot attic and are planning on spraying the foam 3 inches thick multiply these two numbers to get 3 600 board feet. Closed cell spray foam insulation installation cost. Spray foam insulation works as alternative to traditional fiberglass insulation during construction or planning for construction. Spray foam insulation price starts at about 0 60 or 60 cents per board foot for diy open cell spf with a top cost of about 80 cents.

Closed cell spray foam insulation total. This is very important in situations where your code requires an r 21 for the wall but you only have a 2 4 stud because closed cell spray foam is the only way you would achieve the required r value to meet code. Open cell spray foam which usually costs 0 44 to 0 65 per board foot and closed cell spray foam which averages 1 to 1 50 per board foot. For open cell insulation the average price for a project this size would be 2 700.

That means if you used foam it green closed cell which is r 7 per inch it s r value for a 3 5 deep wall cavity would be r 24 5.