Both open-cell and closed-cell spray foam insulation are great for insulating, but depending on your insulation needs, one may be more suitable than the other. Open-cell spray foam is more pliable, making it easier to work with for future installations like cords, wires, and cables. It also has a high expansion rate that can easily fill harder-to-reach areas. Closed-cell spray foam is more rigid, durable, and has a higher R-value. It’s great for places with exposed walls, garage doors, and crawl spaces.