The cost to spray foam an attic depends on several factors:
- Attic Size: Larger attics require more materials and labor, increasing the cost.
- Type of Spray Foam: Open-cell foam is generally cheaper than closed-cell foam.
- R-Value: Higher R-values require thicker foam application, increasing material costs.
- Labor Costs: Varies based on location and contractor rates.
- Accessibility: Difficult-to-access attics may increase labor costs.
General Cost Estimates:
- Open-Cell Foam: Typically ranges from $1.00 to $1.50 per board foot.
- Closed-Cell Foam: Typically ranges from $2.00 to $4.00 per board foot.
Note: Board foot is a unit of volume, calculated as 1 foot x 1 foot x 1 inch.
Example Calculation:
For a 1,000 square foot attic with 6 inches of closed-cell foam:
Volume = 1,000 sq ft x 0.5 ft (6 inches) = 500 cubic feet
Volume in board feet = 500 cubic feet x 12 = 6,000 board feet
Estimated cost = 6,000 board feet x $2.50/board foot (average) = $15,000
Disclaimer: These are rough estimates. Get quotes from multiple contractors for accurate pricing.
