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Tiles lifting

Discussion in 'Tiling' started by geraldthehamster, 23 Jul 2018.

  1. geraldthehamster

    geraldthehamster

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    My neighbour had an outhouse converted to a utility room with a new back entrance. The place was built in the 1940s and I suspect the concrete floor has no DPM. The people who converted it did a generally poor job (I’ve already done remedial work on the roof and guttering for them).


    The issue now is with the ceramic floor tiles. Some have lifted in the heavy traffic area inside the back door. The others so far are staying put. I know that in theory one should redo it all, but ripping up the rest of the tiles isn’t an option, because there are units and appliances, and they wouldn’t want the disruption.


    My question is what could I re-bed the tiles in, to give a reasonable chance of staying put? There isn’t any depth for a localised liquid DPM as well as tile adhesive. I was thinking of using a cement-based exterior adhesive onto the concrete (plus SBR?) and hoping for the best.
     
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  3. L95

    L95

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    What kind of screed was used? If it was Calcium Sulfate/Anhydrite then the lot will probably pop. Sounds like poor prep on the floor to me.

    Regarding the refits, you have the nail on the head. SBR - Bal Max Flex (Topps sell a 5kg) - Grout.
     
  4. geraldthehamster

    geraldthehamster

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    No screed was used, it was tiled straight onto a 1940s concrete outbuilding floor. The bloke who did it parked his horse in the drive.

    It's all coming up and being replaced with laminate.
     
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