Vermiculite was a common type of attic insulation that was sold from the late 1920s up until the EPA shut down the Zonolite vermiculite mine in Libby Montana in 1990. The Zonolite mine, then owned by W.R. Grace, was responsible for 80% of the world’s vermiculite, and vermiculite attic insulation
Continue readingVermiculite Insulation: To Remove or Not
