What is the highest quality insulation?
Spray Foam Insulation: Offers the highest R-value (~R-6. R-6. It’s ideal for irregular spaces and maximizing energy savings. Fiberglass Insulation: Affordable, widely available, and easy to install. R40 insulation means it can resist heat flow pretty well. It’s a solid choice for many homes. R60 insulation is like the heavyweight champ; it offers even more protection and keeps the heat in (or out) even better.