Insulation, any known concerns?

House today had this for wool insulation in the under eave storage space. It looked to be in 2 layers of approx. 1" each. Any known health concerns?

Also blown in (or bagged and brought in) insulation that looks like small crushed stone. What is it called, known R-Value?, any health concerns.




Its most likely vermiculite (asbestos).

Nothing wrong with rock wool.

Vermiculite depending where it came from could be an issue.

Good link Dale. The house was built in 1949, I would assume this goes in line with the mine in question.


The loose insulation looks like vermiculite. That’s my best guess. If it feels like cork it may be.

Vermiculite is a mineral that is related to the asbestos family. A simple lab test would make this determination.