If you’ve been considering spray foam insulation for your next project, you’ve probably seen open-cell and closed-cell options. These two types of foam serve completely different purposes. Understanding which type is the most effective for what you’re doing can help you find long-term solutions for your space.
Open-Cell Spray Foam Insulation
Open-cell insulation is made of a lighter foam that expands when installed. This type is the perfect choice for above-ground areas of the home, such as:
- Main floors
- Upper floors
- Exterior walls above ground
- Attics
- Places with less moisture
Their malleability also makes this type of spray foam an ideal candidate for creating soundproof spaces by eliminating any gaps between walls, ceilings, and floors.

Closed-Cell Spray Foam Insulation
Closed-cell spray foam is much denser and more rigid. This provides more structure that insulates spaces better than open-cell spray foam. It also makes it much more versatile and helps it block moisture. Its qualities make it especially useful in areas with higher moisture levels like basements, crawl spaces, or garages.
At Radiant Drywall & Insulation, we offer high-quality spray foam insulation for homeowners on Long Island. Contact us at (631) 924-0500 today to learn more about how you can protect your home.