Spray Foam Insulation Hype vs Reality

Matt Risinger takes a balanced, evidence-based look at spray foam insulation, separating common misconceptions from practical building science. He compares open-cell and closed-cell spray foam, explains where each performs best, and discusses topics including air sealing, vapor control, indoor air quality, installation risks, and long-term durability. Matt also explores how spray foam compares with fiberglass, mineral wool, and other insulation options, while outlining situations where hybrid insulation assemblies make more sense. Rather than promoting or dismissing spray foam, he focuses on proper installation, climate-specific design, and choosing the right insulation strategy for high-performance homes. This episode is presented without a sponsor to provide an unbiased discussion.