Spray polyurethane, or SPF is foam that expands when it hits the surface, eventually hardens into a virtually impenetrable barrier that blocks moisture, air, and sound. Some benefits of this type of insulation include:

• SPF makes it nearly impossible for small pests and insects to burrow into your home
• The foam is capable of filling the tiniest of cracks
• Perfect for soundproofing
• Open-cell SPF is ideal for attics and basements, while denser closed-cell foam is perfect for crawlspaces
• Cost-effective and durable