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Cutting terra cotta?

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by dangf, Sep 15, 2006.

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  1. dangf

    dangf New Member

    Joined:
    Sep 15, 2006
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    Loc:
    No. VA
    Hello all:

    I've been lurking for about a year now, but this is my first post.

    I recently repointed and re-crowned my chimney, and replaced the top 2' section of 9"x13" terra cotta flue. Lo and behold, the new terra cotta piece is about 4" taller than the broken one I removed, so now my stainless steel chimney liner is too short and does not quite reach the top plate.

    My options are:

    1 - Cut the terra cotta to the appropriate length. Unfortunately, I do not have a wet saw, and I'm having a heck of a time cutting with a dry 7" D concrete circular saw blade. The blade overheats almost immediately.

    2 - Find a small stainless extension (a coupler perhaps?) that will give me an extra 4" of stainless liner length, and attach it with a support clamp. My liner is 6" D.


    Does anyone have any advice as to how to cut the terra cotta or where I can find a small (and inexpensive) stainless liner extension? Or is there an entirely different solution?

    Much appreciated.

    -Dan

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  2. berlin

    berlin New Member

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    turn a ripping wood blade backwards and try that, i've used it with decent success when in a pinch.
  3. sweeper

    sweeper Member

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    Diamond blade, Diamond blade, Diamond blade Dewalt makes one in 7.25 for about 16:eek:o bucks
  4. webbie

    webbie Seasoned Moderator Staff Member

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    diamond blade with water feed if possible!
  5. Homefire

    Homefire New Member

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    You can have the wife or anyone use an old dish soap bottle full of water and aim at the blade as you cut the tile.

    You can also score the tile with a chisel to cut the tile. Its a lot like cutting glass but use the saw it your nervous about breaking the tile.
  6. BrotherBart

    BrotherBart Hearth.com LLC Mid-Atlantic Division Staff Member

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    Am I the only one that thinks a four inch piece of stainless pipe, and given where it will be maybe just 24 gauge pipe, would be a hell of a lot simpler answer to this?

    Pack around the pipe with mineral wool, put on the top plate and rock and roll.
  7. elkimmeg

    elkimmeg Guest

    the chisel approach you rin the risk of cracking the lined past the cut off line. what masons who still use this method do, id fill the flue with packed sand to prevent uncontroled cracking. Here is another variation one might try. small carbide bi drill bit drill out many holes along the cutoff lind then saw it witha diamond blade one acanalso use a sawsall witha diamond blade as well and spray bottle.

    BB offered an equally easier solution get a coupling and add a smooth ss liner section Personally I would use a diamond blade wiz wheel in my 4" grinder after I drilled the holes
  8. dangf

    dangf New Member

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    Sep 15, 2006
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    Loc:
    No. VA
    I bought the DeWalt diamond blade and it worked well enough with periodic sprays of water. I'm now ready to burn. Thanks all.
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