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Crack in exhaust vent

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by mskif, Dec 9, 2008.

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  1. mskif

    mskif Member

    Joined:
    Nov 22, 2008
    Messages:
    76
    Loc:
    Hudson Valley NY
    I had my gas boiler flue relined in a masonry chimney last month when my wood stove was installed. The liner is about 35 feet. There is now a crack in the exit. I can't remember what they used to seal the exit but what can I use to patch it up? Also, I use the gas steam heater to supplement the wood stove. Should I avoid using it until this is patched? Thanks.

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  2. Dave T

    Dave T New Member

    Joined:
    Mar 28, 2008
    Messages:
    299
    Loc:
    Dansville NY
    If it were me I would use hi temp silicone to seal the crack then remove the elbow use a metal trim ring or wall flashing and fasten it to the red brick using masonry fasteners that will help support the pipe at the wall and maybe prevent future sagging, I would try to find one prefabricated use a brush and get all the loose flakes off the brick where the trim ring will touch run a bead of silicone behind the ring and around the outsides of the ring thats what I did here is a pic of mine through the basement wall and it works great..Dave

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