Insulation type

[William M. Corbett]

What would be the insulation type for the attached images of insulation?
Fiberglass batt is in the backround for distinction.

[Peter Doane]

Looks like old Rockwool or "slag wool"

Slag wool is a manmade vitreous fiber made by spinning slag into insulating fibers.

There is another type called mineral wool but its usually white like cotton.

[David P. Valley]

Yeah, that's definitely rock wool insulation.

Not a problem with this insulation.

[William M. Corbett]

I thought is rock wool, but the client said he thought that it may contain asbestos. Thanks for the input David.

[David P. Valley]

Originally Posted by wcorbett

I thought is rock wool, but the client said he thought that it may contain asbestos. Thanks for the input David.

Mineral wool or "rock wool" or "slag wool" building insulation is not asbestos.

[ckratzer]

One of rock wools ingredients is actually limestone.Hence the name rockwool.
The next question this leads to would be is the wool really from sheep?
That ,I don't know.