Spray Foam Insulation cost is typically calculated by the board foot, which is measured like this: 1 foot wide times 1 foot long times 1″ thick.
To calculate the board footage of the space you want to spray, multiply the area you want to insulate by the depth in inches.
Closed-cell Spray Foam is generally $ 1.00 to $1.20 per board foot.
Open-cell Spray Foam is generally $0.25 to $0.30 per board foot.
For example,
2,500 sq ft, At 2″ thick of closed cell = $5000 to $6000
2,500 sq ft, At 4″ thick of open cell = $2500 to $3000
