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  1. #1
    Join Date
    Aug 2006
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    Blue Mountains, NSW
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    142

    Default Ceramic tile underlay on bathroom floor

    I have removed the tiles and screed from my bathroom floor, and want to put down ceramic tile underlay before the floor is re-waterproofed etc. However around the edges of the room the existing waterproof flashing has made a ridge about 40mm wide and 1-2mm high. Therefore the underlay will not be able to sit completely flat if it is layed with the floor as it is. This seems like a problem to me. Is it, and if so, any suggestions for how to make the floor flat before the underlay goes down?
    Last edited by JMB; 4th March 2008 at 01:08 PM. Reason: Bad spelling

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  3. #2
    Join Date
    Aug 2003
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    Pambula
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    Default

    I wouldn't think it would be a problem. You have to glue it anyway and the glue bead will be just under a mm thick. If there is a slight rise to the edge, that can be taken up when you lay the tiles.
    "I don't practice what I preach because I'm not the kind of person I'm preaching to."

  4. #3
    Join Date
    Nov 2007
    Location
    Melbourne
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    49
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    104

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    JMB,

    I did the same thing on the tile underlay I just put down on the floor. I have 75x50mm PVC angled flashing around the perimeter that I glued down. Yes it is raised, but as SilentC has said, it can be taken up when tiling no problem.

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