I do know that if you have vermiculite insulation in your attic (we do), instructions are to assume it has asbestos in it as the mine in Montana that was the main source had both minerals present. A clean test of a sample from your attic doesn’t guarantee that another sample won’t be contaminated, so all the insulation has to be considered hazardous waste if removed, or encapsulated if retained.I just don't understand why vermiculite insulation in those large bags 3 cubic foot bags for ~$20.00 is no longer sold at our local stores?
(The above is what I read when looking into our options, and as a result we’re letting sleeping dogs lie for now and living with woefully inadequate attic insulation in our old house.)
I don’t know if there is another, safe source that was packed in the larger bags and lack of demand has led to its discontinuation, or if the larger bags had the asbestos problem.