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Tiling floor prep

Discussion in 'Tiling' started by ash1212002, 27 Oct 2019.

  1. ash1212002

    ash1212002

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    We have half floorboards sitting on joists and brick sleeper walls and the other half of the kitchen is concrete which we'll be tiling over

    Area to be covered is 3.35 x 6.87 metres

    We've had a tiler around to quote for the job who has specificied 6mm plywood to be laid over the floorboards screwed down every 150mm, he has stated no preparation is required on the concrete floor side

    Is 6mm plywood acceptable for tiles to be laid over?
     
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  3. bobasd

    bobasd

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    you intend to tile over both floor surfaces in the kitchen?
    will boarding one side raise it above the other side?
    what about the threshold height into the next room?

    is there a DPM and insulation under the concrete?
     
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  4. foxhole

    foxhole

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    12mm ply minimum. What type of tile ?
     
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  5. ash1212002

    ash1212002

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    Yep both floor surfaces will be tiled over, the tiler advised 6mm rather than 12mm plywood as this will only marginally raise the floor which will still allow him to achieve a level floor throughout

    I have no idea whether there is a DPM and insulation below the concrete, we've only just recently purchased the house
     
  6. bobasd

    bobasd

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    is the kit a shell - totally empty of base units and appliances and skirtings?
    6mm ply can have a tendency to "curl up" when wet with adhesive, and it can pull out the screw fixings.

    whats been recommended for the join between the solid and the suspended floor - thats the weakest link in the installation?

    no DPM means moisture can seep through the conc.
    no DPC means rising damp can occur - but it shouldn't affect the floor.
     
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  7. ash1212002

    ash1212002

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    The kitchen is totally empty and no skirting, the tiler has suggested the following

    SBR bond the 6mm plywood, both sides including the edges
    Screw the plywood every 150mm
    And use an S1 or S2 adhesive

    There is no bounce on the floorboards

    Regarding the join between the solid and suspended floor he hasn't suggested anything! But will double check with him

    What should he be installing?
     
    Last edited: 28 Oct 2019
  8. foxhole

    foxhole

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    6mm hardibacker would be better if you keep it that thin.
     
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  10. ash1212002

    ash1212002

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    Will 6mm cement board be ok? If so how would this be secured down? Is it screws and glue?
     
  11. foxhole

    foxhole

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    YES
     
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  12. ash1212002

    ash1212002

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    Can grab adhesive be used to secure the boards? Or does it have to be a specific type of floor tile adhesive?

    Do the boards need to be primed with bal sbr bond?
     
  13. foxhole

    foxhole

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    I would use foam adhesive
     
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  14. ash1212002

    ash1212002

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    Can you recommend one in particular?

    How about priming the boards?
     
  15. foxhole

    foxhole

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    They all work very well, you can prime but floor tiles can't fall off like a wall tile so optional.
     
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