Cork insulation

[Brian E. Kelly]

[sspradling]

Yep, it felt like cork-real light, floated in the sink after I lit it, like cork.
I don't know how cork acts when it burns, but this stuff kink of had an oily, sooty smoke. Kinda harsh.
Mark, after reading the link you provided, I'm thinking this was originally thick cork board that was reground, or just busted up, and spread around in this attic. Thank you.
Stu

[William C. Martin]

Have seen cork in commercial applications, only once in residential. looks like cork.

Cork will burn with the right conditions present. No matter if it has been treated or not.

Just give it enough heat and air it will smolder for days. Old cold storage was being torn down, cutting torch set of the cork insulation (about 12" walls) damn thing burnt for over a week. Demolition company and fire department finally gave up and let it burn out.