Vermiculite In Attic Years Used

Concerns about asbestos contaminated vermiculite insulation.

Vermiculite in attic years used.

As well as being rich in vermiculite this mine had the misfortune of having a deposit of tremolite a type of asbestos. Up to 85 percent of all vermiculite insulation in the u s. Vermiculite is a mineral used in a number of consumer products including home insulation. I installed sofett covers and did electrical rewiring over the 30 to 40 years i have lived here.

For years zonolite was used in the insulation of homes throughout the united states. About 20 years ago i had additional insulation blown in to the attic that covered the vermiculite. Grace owner of the montana mine that produced zonolite came to a different conclusion. When the vermiculite was extracted some tremolite came in with the mix.

Vermiculite insulation and asbestos vermiculite. It has vermiculite insulation in the attic. 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. Came from a mine in libby montana sold under the name zonolite.

The majority of the vermiculite used worldwide was from a mine in libby montana owned and operated since 1963 by w r. While some believe the substance to be safe a 2008 class action lawsuit against w r. Sizes of vermiculite products range from very fine particles to large coarse pieces nearly an inch long. If your home was built before 1990 you might have vermiculite insulation in your walls or attic.

Vermiculite is a mineral that was used for insulation. I occasionally worked in the vermiculite.