½# Open Cell Spray Foam 55 gallon kits: 16,000-21,000 board feet coverage We also have Open Cell Spray foam insulation for your project. Open cell is great for sound, and you will get your air barrier at 3.5” thickness.
Typical installations are limited to a total thickness of 4 inches.” Since Comfort Foam 158 has an R-value of 6.2 per inch, the max- imum thickness of 4 inches yields an R-value of about 24.8.
16666 pounds each. Two 55 gallon drums of foam is called a Set. The weight of material in the drums is 500lbs and is 50 gallons. So spraying a set of material is 1,000 pounds being installed.
Spray-In Insulation Costs by TypeFoam TypeMaterials Per Board FootInstallation Per Square FootOpen cell$0.44 - $0.65$1.50 - $4.90Closed cell$1.00 - $1.50$1.50 - $4.90
Since closed cell foam has a higher R-value per inch, installers generally spray 2″ in walls and 3″ in rooflines to meet the energy code requirements of R-13 and R-19, respectively.
If your enclosed walls need insulation, a DIY spray foam kit won't work. The only way to insulate existing enclosed walls is to call an insulation professional.
Closed cell polyurethane foam used in interior applications (also sometimes referred to as mid-density or two-pound SPF) typically weighs between 1.8 and 3 pounds/cubic foot when fully cured.
Open-cell spray foam absorbs and holds water. It has a lower R-value per inch than closed-cell foam and is vapor-permeable. The R-value is R-3.5 to R-3.6 per inch, so filling a 2×4 cavity yields about an R-13.
3.7 per inchOpen-cell spray foam has an R-value of 3.7 per inch, while closed-cell spray foam delivers an R-value of up to 6.5 per inch. To achieve the R-value requirements of commercial buildings, spray foam insulation would be a more efficient and optimal choice compared to fiberglass.
5.0 to 7.0 per inchThe R-value of closed cell spray foam ranges from 5.0 to 7.0 per inch, although the R-value can be different depending on the product. Closed cell spray foam is denser than open cell spray foam and is often used in areas like basement box sills where it helps prevent moisture from entering the home.
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