Batt insulation (also known as blanket insulation) is made of fiberglass, mineral wool, plastic fibers, or natural fibers, which are pre-cut into flat pieces. It is typically fitted between your home’s studs, rafters, and joists and can insulate unfinished walls, floors, attics, and ceilings. Batt remains effective over time because it does not settle and can help with sound dampening.
Batt insulation can have a relatively short life, though, compared to spray foam, it has an average lifetime of 12 years. , it starts to lose its effectiveness.