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  1. #1
    Join Date
    Mar 2004
    Location
    Columbus Ohio
    Posts
    328
    I noticed several cracked bricks on the top 3 ft of my
    chimney and a couple brick have lost the entire outer face.
    A roofer told me that water is penetrating the brick & morter and freezing causing this damage. That makes sense to me, what do you guys think and what should I do??
    Is the cement crown just ordinary cement? What is the best
    thing to use to seal the brick and crown after I repair it
    Thanks in advance for your proffesional advice

  2. #2
    Join Date
    Apr 2004
    Location
    MN
    Posts
    1,807
    Do you have a chimney liner?
    A Veteran is a person, who at some point in their life, wrote a blank check payable to the United States of America for payment up to and including their life.
    Gene Castagnetti-Director of the National Memorial Cemetery of the Pacific in Hawaii

  3. #3
    Join Date
    Mar 2004
    Location
    Columbus Ohio
    Posts
    328
    Yes there is a ceramic liner. The chimney is for a gas
    fire place only. I found a place that has a polymer
    compound for repairing the cap. I thought I would reskim
    the entire cap and then use a masonry sealer.
    Or should I remove the old cap and make a new one?
    The cap has some cracks and a couple small chunks are gone.
    Is there a sealer you would recommend. Thanks Doc

  4. #4
    Join Date
    Apr 2004
    Location
    MN
    Posts
    1,807
    To the best of my knowledge, it is regular old concrete. Around here, a clay liner is no longer acceptable by code. Even with clay, we are required to use a metal liner when utilizing a chimney.
    A Veteran is a person, who at some point in their life, wrote a blank check payable to the United States of America for payment up to and including their life.
    Gene Castagnetti-Director of the National Memorial Cemetery of the Pacific in Hawaii

  5. #5
    Last year, I relayed the top two layers of a chimney with the help of a retired bricklayer on the ground. Cap was made with mortar mix. He suggested using tar to seal it. I thought that would be too ugly. so I used a concrete sealer. It wasn't the most fun job to do.

  6. #6
    Join Date
    Mar 2004
    Location
    Columbus Ohio
    Posts
    328
    I got up there and chipped away all the loose stuff which
    was alot more than I thought. I noticed all the damage was
    around the flue cap. So i think is is due to the moisture
    in the heat condensing on the cold concrete and refreezing
    causing the cracking. And ofcourse its acicic causing the
    spalding. So tar would probably work well if you didnt have to look at it. I used "Red Line Fast Crete" to repair
    the cap. Now I need to seal it and the brick. I got some good masonry sealer. Cost like $27/gal. Hope it works.
    Not much fun at all

  7. #7
    You have one more thing to do. Get a good roofing caulk and caulk the cap to liner space.

  8. #8
    Join Date
    Mar 2004
    Location
    Columbus Ohio
    Posts
    328
    Caulk where the cap meets the liner? That makes sense
    Thanks

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