According to Steve Barker :
Here's the video of trying to burn properly treated cellulose.

click on the big burn link at : http://www.cocooninsulation.com/homeowners/

It's an interesting video. But what must be remembered is that
that's just one manufacturer's test (not all cellulose is created
equal) shown as a marketing tool, and secondly, I'm not altogether
convinced that those fires were that representative of typical fire
behaviour in a real building structure. Eg: real buildings will
have hotter fires than that.
--
Chris Lewis,

Age and Treachery will Triumph over Youth and Skill
It's not just anyone who gets a Starship Cruiser class named after them.