Spray Foam Roofing Calculator
Foam volume and coating from roof area and R-value target.
Inputs
%
Results
Foam Required (board ft)
4,950
Foam Sets (A+B drums)9
Achieved R-Value9.8
Coating (gallons)100
Walkway Granules (lbs)150
Primer (gallons)12
Est. Material Cost ($)$10,575
How to Use This Calculator
- Enter the roof area (sqft) and target foam thickness (inches).
- Select coating type (silicone or acrylic) and enter walkway area (sqft).
- Set waste factor (%).
- Review board feet of foam needed, foam sets, achieved R-value, and gallons of coating.
- Spray foam requires licensed applicators and favorable weather (low humidity, above 40F) for proper adhesion.
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