Insulation, any known concerns?

sfalvey · October 29, 2006, 1:44am

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.

srowe · October 29, 2006, 1:45am

Its most likely vermiculite (asbestos).

dduffy · October 29, 2006, 1:49am

Nothing wrong with rock wool.

Vermiculite depending where it came from could be an issue.

sfalvey · October 29, 2006, 2:27am

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

Thanks.

kamata · November 12, 2006, 12:58am

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

ldapkus · November 12, 2006, 1:04am

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