Insulation typically lasts 20 to 30 years, though some types, like fiberglass and rockwool, can last up to 50 years.
Faced insulation has kraft paper attached to it, which enhances its sturdiness and prevents it from falling. Unfaced insulation lacks this paper but performs similarly.
Closed cell foam consists of tightly packed cells that prevent air and moisture from entering, making it more rigid and stable than open cell foam.