Insulation slows heat moving through your walls, attic, and floors, while air sealing stops heated air from physically escaping through gaps and cracks. They solve two different problems, so a home with plenty of insulation can still feel drafty, and a well-sealed home with thin insulation can still lose a lot of heat. Iowa homes need both, and spray foam is one of the few materials that does both jobs at once. Think of it like winter clothing. A thick wool sweater is great i