Spray foam seals gaps and cracks better than traditional insulation, which makes it a smart choice for energy efficiency and comfort. But how much does it cost? Here's how the pricing works, what affects it, and how to decide if spray foam is right for your space.
Open cell vs. closed cell pricing
Spray foam comes in two main types, each with different costs and benefits:
- Open cell is lighter and less dense. It costs less but has a lower R-value per inch.
- Closed cell is denser and costs more. It has a higher R-value and acts as a moisture barrier.
A board foot is a 12 x 12 inch square, one inch thick, so thicker foam uses more board feet per square foot of surface.
What else affects the price
- Area size: larger jobs usually cost less per square foot.
- Access: hard-to-reach spaces take longer to spray.
- Prep work: removing old insulation or repairing surfaces adds cost.
- Labor: rates vary by region and contractor.
Example: spray foaming a 20x20 garage
A 20x20 garage has 400 sq ft of floor, but you insulate the walls and ceiling, which comes to roughly 1,200 sq ft of surface. Expect about $1,000 to $1,500 for open cell or $2,000 to $3,000 for closed cell, including materials and labor. Wall height, ceiling type and prep work change the final number.
How spray foam saves money long term
Spray foam costs more upfront, but it stops air leaks and keeps South Florida heat and humidity out. That means lower electric bills, less strain on your AC and less risk of moisture and mold.
- Lower cooling costs, by up to 40% in many homes*
- Less wear on your HVAC system
- Higher property value
Tips to get the best value
- Compare quotes. Get more than one estimate.
- Check credentials. Hire a licensed and insured contractor.
- Ask about warranties on the work.
- Match foam to the goal: open cell for sound, closed cell for moisture control.
- Plan prep work: clear the area and fix damage before install day.
Why spray foam fits South Florida
- Seals air leaks better than traditional insulation
- Closed cell acts as a moisture barrier against mold
- Keeps temperatures steady from room to room
- Cuts energy bills in hot climates
The best way to get an accurate price is a free inspection. See our spray foam insulation service, or compare it with a radiant barrier.
*Savings vary based on your home, its current insulation, air leakage and energy use. Higher R-values mean greater insulating power.