I'm gonna get the material tested - already bought the kit. But I'm wonder what people think - I thought it might be old mineral wool since I've seen stuff that looks similar to it. I'd read that vermiculite is hard like pellets, and this stuff is soft like wool, so I don't think it's that.
Thoughts? It's from my attic - old house, built in the late 1860s. There's tons of it up there. It's old and moldy - we had a raccoon living up there for a bit after it ripped through the soffit - was quite a deal to clean up after(I wore a P100 respirator).