Spray Foam
Premium Sealing and Insulation in One
Spray foam is the premium choice when you want insulation and air sealing in a single step. It expands on application to fill gaps, cracks, and voids, forming a solid barrier that stops air leakage and delivers excellent thermal performance, more than traditional insulation can offer.
The two types serve different needs: open-cell is lighter and more affordable, while closed-cell is denser, insulates better, and resists moisture. A good pro matches the type to the space and your goals rather than defaulting to the most expensive option.
Abode connects you with local spray foam pros. Compare specialists, understand the investment, and get top-tier efficiency for your home.
Did You Know?
Spray foam can seal gaps so effectively that it doubles as an air barrier, which is why a properly foamed home can feel dramatically less drafty almost overnight.
Spray Foam Cost. How Much Do Projects Cost?
Most projects run between $1,500 and $3,000. The average price is typically around $2,200.
| Cost Factor | Typical Range | Notes |
|---|---|---|
| Open-cell foam | $0.44-$0.65 per board foot | Lighter and more affordable |
| Closed-cell foam | $1.00-$1.50 per board foot | Denser, better insulation and moisture resistance |
| Labor | $50-$100 per hour | Experienced application for correct coverage |
Typical duration: 1 to 2 days
Last reviewed: 03/08/2026
Signs You Need Spray Foam
- Drafts and air leaks throughout the home
- High energy bills
- Moisture issues in a crawl space or basement
- Uneven temperatures
- A desire for the highest-performing insulation
Is It Right For You?
Who It's For
- Homeowners wanting top-tier insulation and air sealing
- Anyone insulating moisture-prone crawl spaces or attics
Who It's Not For
- Budget projects where blown-in or batt would suffice
- Simple attic top-ups that don't need foam's performance
What to Watch Out For
Foam's performance comes at a premium price
Improper installation can trap moisture or off-gas
Alternatives to Consider
| Alternative | Better When | Worse When |
|---|---|---|
| Blown-in insulation | Much cheaper for attics | Less effective as an air and moisture barrier |
| Batt insulation | Lowest cost | Leaves gaps and offers no air sealing |
Is It Worth It?
For homes where efficiency and air sealing are priorities, spray foam's superior performance justifies the higher cost through years of energy savings.
Questions to Ask Your Pro
- Is open-cell or closed-cell right for this space?
- How do you prevent moisture issues after application?
- What's the expected energy savings for my home?
Frequently Asked Questions
On average, homeowners pay $1,500 to $3,000 for spray foam in walls and attic, including materials, labor, and prep work.
Closed-cell foam is denser and insulates better but costs more, running $1.00 to $1.50 per board foot versus $0.44 to $0.65 for open-cell.
The main drivers are the area size, the foam type, and installation complexity like accessibility and existing conditions.
Labor typically runs $50 to $100 per hour, and choosing an experienced contractor helps ensure the foam is applied correctly.
It expands to seal gaps, cracks, and voids, forming a solid barrier that stops air leakage and delivers excellent thermal insulation.
