What Is Closed-Cell Spray Foam?
Closed-cell spray foam is a dense, rigid polyurethane insulation that seals air leaks and adds extra structural support.
In contrast to open-cell foam, closed-cell foam is denser and offers extra structural support, making it suitable for exterior walls, roofs, and commercial structures. It also acts as a barrier against moisture, which helps in humid climates like Florida’s.
Best uses for closed-cell foam
- Exterior walls and roofs
- Commercial and metal buildings
- Areas exposed to humidity or moisture
- Spaces needing high R-value in limited depth
Why Choose Closed-Cell Foam?
Closed-cell foam gives the highest R-value per inch, resists moisture and strengthens the surfaces it is applied to.
- Higher R-value per inch — roughly R-6 to R-7, ideal where space is limited.
- Moisture resistance — acts as a barrier against moisture, mold and pests.
- Strength — adds rigidity to walls and roofs.
- Durability — built for exterior and commercial use.
Compare with open-cell spray foam or see our residential & commercial services.