Singed Rockwool

[Pine]

My rockwool has singed brown on many fillamentous edges.

Does rockwool have the capacity to catch fire?

[urbanfarmer]

EVERYTHING burns at some temperature...

Rockwool stone wool withstands more than 1000°C

The major difference between stone wool and other types of insulation materials is that Rockwool stone wool withstands temperatures of more than 1000°C. Glass wool insulation will melt at a lower temperature (600°C). Most foamed plastics will decompose, burn and/or disappear at temperatures below 300°C. Rockwool insulated constructions will thus have a higher fire resistance than constructions insulated with any of the other materials. This can provide vital extra time for people to escape the fire, and for fire fighters to extinguish the fire - before the building becomes completely engulfed in flames and collapses.

http://www.rockwool.com/fire+safety/...ire+resistance