Please help ID this loose-fill insulation
Recently did some work in an attic that contained a type of loose-fill insulation I’ve never seen before, and I would like to help the homeowner find out what it is. It does not look like vermiculite.
It’s been poured over old fiberglass batts in this 1940’s-era house; I’d guess sometime between the 1950’s and 1970’s. It looks for all the world like EPS beads. Lily white, about the size of peas, very consistent in size. But it sure ain’t EPS. It feels like lightweight little rocks, and just disturbing it a little kicks up the most obnoxious dust.
All the vermiculite I’ve seen is distinctive enough: darker colors, mica-shine, angular shapes of varying size. This is not that.
Of course, I’ll tell him to get a professional opinion and lab test, but was hoping to provide some links to justify the expense in our wild west, unregulated corner of Ohio.
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