Vermiculite In Attic Years Used

We have lived in this house for 40 years.

Vermiculite in attic years used.

The majority of the vermiculite used worldwide was from a mine in libby montana owned and operated since 1963 by w r. Up to 85 percent of all vermiculite insulation in the u s. Vermiculite is a mineral that was used for insulation. Concerns about asbestos contaminated vermiculite insulation.

Vermiculite is a mineral used in a number of consumer products including home insulation. The expanded vermiculite is a light weight fire resistant and odorless material and has been used in numerous products including insulation for attics and walls. For years zonolite was used in the insulation of homes throughout the united states. Sizes of vermiculite products range from very fine particles to large coarse pieces nearly an inch long.

Came from a mine in libby montana sold under the name zonolite. Some vermiculite produced at libby mine in montana from the 1920s until 1990 sold primarily under the brand name zonolite has been found to contain asbestos. While some believe the substance to be safe a 2008 class action lawsuit against w r. I occasionally worked in the vermiculite.

I installed sofett covers and did electrical rewiring over the 30 to 40 years i have lived here. It has vermiculite insulation in the attic. If your home was built before 1990 you might have vermiculite insulation in your walls or attic. About 20 years ago i had additional insulation blown in to the attic that covered the vermiculite.

The mine was closed in 1990. As well as being rich in vermiculite this mine had the misfortune of having a deposit of tremolite a type of asbestos.