Spray foam insulation can last 20 to 30 years or more if properly installed and maintained.
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.
Modern cellulose insulation is made from 75 to 85 percent recycled paper or denim, treated with boric acid, borax, or ammonium sulfate.