Vermiculite insulation, is it dangerous?

by Gilbert Migirditsian, professional engineer, home inspector, and founder of GM Inspection

Did you know that vermiculite was one of four types of loose fill insulation approved for installation under the Canadian Home Insulation Program (CHIP) that provided grants to homeowners who improved home energy efficiency?  CHIP was operated by the federal government between 1977 and 1984.  Certain types of vermiculite may contain asbestos, more specifically the type branded as Zonolite, a loose fill insulation, which originated from a mine in Montana.  The best way to minimize the exposure risk is to avoid disturbing the insulation.  In case where this type of insulation is present, important decontamination costs may arise.  Make sure you are aware of this such that you can plan accordingly!

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