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  1. #1
    Join Date
    Jan 2014

    Default Insulating around flue liner

    I have a 1797 Brick Colonial house that we had several flexible flue liners installed inside the brick chimneys. I notice a lot of air escaping up around the liner and am looking for suggestions to seal it.

    The brick flue narrows about 4 feet up so I can't easily reach it by hand and will have to be able to push it in place with a stick or such. A urethane foam would be great except for being flammable.

  2. #2
    Join Date
    Nov 2012
    central pa

    Default Re: Insulating around flue liner

    well to start were the liners insulated themselves? they should be. next how do the liners exit the chimney how ever they exit the installer should have sealed around them. if they go into an old fireplace there should be an insulated blockoff plate installed to stop the draft

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