Open-Cell vs Closed-Cell Spray Foam: Which Is Right for Your Home?

Choosing between open-cell and closed-cell spray foam depends on your specific needs, budget, and application area.

Open-Cell Spray Foam

• R-value: 3.5-3.7 per inch
• Cost: $1.00-$2.00 per sq ft
• Density: 0.5 lb/cu ft
• Best for: Interior walls, attics, soundproofing
• Pros: Affordable, excellent sound absorption, expands to fill cavities

Closed-Cell Spray Foam

• R-value: 6.0-7.0 per inch
• Cost: $2.00-$3.50 per sq ft
• Density: 2.0 lb/cu ft
• Best for: Exterior walls, crawl spaces, metal buildings
• Pros: Highest R-value, moisture barrier, adds structural strength

Our Recommendation

For Alabama's humid climate, we typically recommend closed-cell for crawl spaces and exterior walls (moisture protection), and open-cell for interior walls and attics (cost-effective soundproofing).

Not sure which is right for you? Call Shoals Spray Foam at (256) 415-7610 for a free assessment.