Insulation, any known concerns?

[Scott Falvey]

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.

Thanks.

[Shawn Rowe]

Its most likely vermiculite (asbestos).

[Dale Duffy]

Nothing wrong with rock wool.

Vermiculite depending where it came from could be an issue.

http://www.vermiculiteatticinsulation.com/

[Scott Falvey]

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

Thanks.

[kamata]

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

[Linas I. Dapkus]

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