Heat tolerance of Fibreglass

wg_bent Posted By wg_bent, Jan 13, 2006 at 7:00 PM

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  1. wg_bent

    wg_bent
    Minister of Fire 2.
    NULL
    

    Nov 19, 2005
    2,248
    6
    Loc:
    Poughkeepsie, NY
    Resource for this? not faced, just raw fibreglass.
     
  2. Rhone

    Rhone
    Minister of Fire 2.
    NULL
    

    Nov 21, 2005
    825
    3
    Unfaced fiberglass Melts at around 1100 degrees and I don't know what temp it can catch fire.
    Chimney Fire is 2000+ degrees, so decent chance fiberglass may melt during a chimney fire if in contact with liner.
    Mineral Wool insulation (same technique as fiberglass but different material) melts at over 2100 degrees and will maintain integrity during a chimney fire.

    Lastly, neither stops air flow. If one wants something to stop air flow, use a piece of sheet metal.

    A chimney fire can reach over 2000 degrees inside the liner, the outside during one will be cooler just don't know what the outside would be.
     
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