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Sealing around chimney flue

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  • 07-10-2009 1:15pm
    #1
    lastbuilders
    Registered Users Posts: 302 ✭✭


    Hi,

    I have a stainless steel chimney flue from my boiler going through my garage roof. It has lead flashing but there is some water going between the flashing and the flue.

    Is there a tape which can be used to seal this?

    Cheers,
    Lastbuilders

    EDIT: I should add that there is a storm collar already on the flue.


Comments

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    #2
    CJhaughey
    Registered Users Posts: 14,907 ✭✭✭✭CJhaughey


    I would use Silicon, Not many tapes will handle the heat from a flue.
    Surely if the storm collar is doing it's job there should be no water? Maybe just seal the storm collar correctly?


  • Options
    #3
    ttm
    Closed Accounts Posts: 2,045 ✭✭✭ttm


    If its a gas or oil boiler you might get away with aluminium tape. If the flue is only warm when in use and as it goes through a roof it might be double walled in which case it should work fine if its gets very hot it won't work and the glue will soon burn off. But does depend where the water is coming in.


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    #4
    PeteHeat
    Registered Users Posts: 648 ✭✭✭PeteHeat


    Hi Last,

    Belt and braces is remove the storm collar or loosen it and move it up out of the way, silicone around where the lead meets the flue, refit the storm collar and apply a bead of silicone around the top of the collar and tighten it, that gives you two lines of defence.

    Use a good quality silicone Hilti, Tec 7 etc.

    .


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