Why Use Open Cell Insulation? | Affordable Efficiency & Performance Explained! Let’s talk about why open cell spray foam insulation is one of the smartest choices for homeowners looking to save money and boost efficiency. 💡 In this video, we break down how open cell performs against all three types of heat transfer radiant, conductive, and convective while providing excellent air sealing and moisture control. With 2x12 rafters sprayed at 8 inches and 2x6 walls averaging 5 inches, this setup off