Dean discusses how homes in different climates share similar construction because insulation is universally important for both heat and cooling. He explains the differences between blown-in and rolled fiberglass attic insulation, noting that attics function best when left empty to insulate effectively.

For older homes without wall insulation, Dean outlines options like hiring professionals to blow insulation into existing walls or removing drywall yourself for better access and savings.

He also highlights innovative insulation materials and the value of air-sealing, wrapping up with his clothing analogy to redefine how we think about insulating our homes.