Cracked Marble Fireplace Surround

bboomer Posted By bboomer, Mar 1, 2006 at 11:06 PM

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  1. bboomer

    bboomer
    New Member 2.
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    Mar 1, 2006
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    Hi everyone.
    I'm a newbie to the group.
    I had my mason replace a gas fireplace with a real masonry wood burning one.
    Opening is 40 by 29 with a 12" by 12" flew.
    My problem is this.
    Had the marble fabricators install (4) 12 inch wide 3/4" deep Jerusalem Gold around the fireplace opening.

    The top piece developed a small crack from top to bottom in the middle. They replaced it with another piece this time with 2 stainless steel
    strips embedded lengthwise in the back of the top piece.
    It ALSO cracked.
    My question? Is the fireplace burning too hot - I measured it at 185 to 190 degrees in the middle top area (with infrared temp. device) OR is the marble
    they are using from an inferior source - should this type of marble be able to withstand 190 degree heat over several hours time?
    Any and all suggestions will be appreciated.
    Thanx,
    bboomer@optonline.net
     
  2. Sandor

    Sandor
    Minister of Fire 2.
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    Dec 9, 2005
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    Loc:
    Deltaville,VA
    Is it real marble or an agglomate?

    How are they supporting the marble? What is the substrate? Glue, mortar, etc?
     
  3. elkimmeg

    elkimmeg
    Guest 2.
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    Another question why should it be 190 degrees that sounds excessively hot Is air space required been covered up?
     
  4. bboomer

    bboomer
    New Member 2.
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    Mar 1, 2006
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    They applied the marble against the wall/brickwork with (I believe) thinset.

    And I am wondering if 190 degrees is normal for the top wall area over the fireplace opening?

    Again thanx for any advice/comments, etc.

    Brett
     
  5. bboomer

    bboomer
    New Member 2.
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    Mar 1, 2006
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    The air space seems fine.

    I have a 12/12 flue with a proper air chamber.

    I will tell you I had to raise the grate by 2.5" (with cut brick at each foot) in order to get good air flow, so as to keep the fire burning properly.

    BB
     
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