Open-cell spray foam is a lightweight, flexible insulation solution designed to create a superior air barrier while providing exceptional sound-dampening qualities. Unlike closed-cell foam, the cells are intentionally left "open," making the foam softer and more pliable. This allows it to expand significantly more upon application—often up to 100 times its liquid volume—meaning it can easily fill every nook, cranny, and hard-to-reach gap in a single pass. With an R-value typically around R-3.5 to R-3.8 per inch, it is an ideal choice for interior walls and attic spaces where maximum expansion and air sealing are the priorities.

Key Benefits of Open Cell

Sound Dampening: The soft structure absorbs sound waves, making it perfect for media rooms or quiet bedrooms.

Complete Expansion: Expands deep into wall cavities to stop air leaks that traditional fiberglass misses.

Cost-Effective: Provides a high-performance air seal at a lower price point than closed-cell foam.

Flexibility: Moves with your home’s natural settling over time without cracking or pulling away.