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A Non-Standard Repair for Masonry Chimney

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by Rob From Wisconsin, Nov 12, 2006.

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  1. Rob From Wisconsin

    Rob From Wisconsin Minister of Fire

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    I remembered several years ago reading about technique
    that was infrequently used to repair damaged/cracked
    masonry chimneys. It involved filling the flue with a thermal
    cement material & pulling a bell-shaped device through it,
    making it into a circular flue packed w/ this special cement.
    I don't remember all the details beyond that....
    Anyone else out there shed some light/experience with this???

    Rob

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  2. BrotherBart

    BrotherBart Hearth.com LLC Mid-Atlantic Division Staff Member

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  3. Rob From Wisconsin

    Rob From Wisconsin Minister of Fire

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    Thanks Bart!!
    I'm pretty sure this is what they did on the masonry chimney of the
    house we just bought. It may not be the exact type. Some heat can
    still be felt on the cinder block rising through our house, but even after
    a day's worth of hot fires, it is barely warm to the touch.....

    Rob
  4. begreen

    begreen Mooderator Staff Member

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    Funny you should bring this up. I just researched it for my neighbor. The method I found is Ahrens Chimney Technique:
    http://www.ahrenschimney.com/
  5. laynes69

    laynes69 Minister of Fire

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    I take it these liners are reinforced with some special fibers? I would think it would crack over time like concrete, but I guess its different. Seems like a good option to redo a chimney. I seen it done on this old house.
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