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Vermiculite insulation, especially the product sold under the brand name Zonolite, is known to have been contaminated with asbestos, specifically amphibole asbestos. The primary type of asbestos found in this loose insulation is typically tremolite, although other amphibole asbestos minerals like actinolite and anthophyllite can also be present. Tremolite is the most common asbestos contaminant in this type insulation and is associated with the Libby mine in Montana, which was the source of much of the vermiculite insulation in the United States.
It’s crucial to note that insulation from the Libby mine has been associated with serious health risks due to asbestos exposure. Vermiculite installed before the early 1990s, when the association between vermiculite from the Libby mine and asbestos was recognized, may contain asbestos.
Asbestos-Containing vermiculite insulation
If you suspect the presence of vermiculite insulation in the home and it was installed before the early 1990s, it is recommended to have it tested for asbestos. Removing this type of insulation without taking appropriate precautions can lead to the release of asbestos fibers into the air, posing serious health risks.
Contact our Modern Pros office to discuss how we can help to secure a safe and healthy environment in your residential home or commercial building.