Frequently Asked Spray Foam Questions

Spray Foam Insulation

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What’s the difference between open-cell and closed-cell spray foam?
Open-cell foam is soft and expands a lot as it’s applied. It’s excellent for soundproofing interior walls and hard-to-reach spaces but does not block moisture. Closed-cell foam is denser, has a higher R-value, adds strength, and acts as a moisture barrier. In Florida, closed-cell foam is often preferred in attics, crawl spaces, and metal buildings because it helps control humidity.

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What is R-value and how do open-cell and closed-cell foams compare?
R-value measures how well an insulation material resists heat flow—the higher the R-value, the better the insulating power. Open-cell spray foam typically has an R-value of about 3.5 to 4 per inch, while closed-cell spray foam has an R-value of about 6 to 7 per inch. This makes closed-cell foam more effective in areas where maximum insulation and moisture resistance are needed.

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Which type of spray foam is best for my home?
It depends on your needs and location. Open-cell foam is great for soundproofing and interior walls. Closed-cell foam is better for moisture-prone areas, extreme temperatures, and when you need structural strength. Many projects use a combination of both.

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Why is spray foam recommended for Florida?
Florida’s heat and humidity make spray foam an excellent choice because it seals out humid air, prevents mold growth, and helps your HVAC system run more efficiently.

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How much does spray foam insulation cost?
Spray foam pricing is based on your specific project, including the type of building, size, foam thickness, and whether it’s open-cell or closed-cell. We recommend an in-person evaluation for accurate pricing.