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Discuss Have I got the correct adhesive for 300x600 porcelain? in the Tiling Forum area at TilersForums.co.uk.

  1. Kcoh

    Kcoh Active Member

    Location:
    Coventry
    I have purchased mapei S1 keraquick flex rappied adhesive for the floor boarding and tiling and mapei S1 kerflex standard set for the walls. The tiles are 10mm 600x300 ceramic (for one wall) and 8mm 600x300 for the rest of the walls and floor. The floor boards will be boarded with tile backer 10mm boards and underfloor electric heating on top.
     
  2. JulianSidney

    JulianSidney Billy no mates. Trusted Advisor Professional Tiler Top Contributor

    I would SLC over the wires as well
     
  3. Huddersfield Tiling

    Huddersfield Tiling Huddersfield Tiling

    Location:
    Huddersfield
    If your floor boards are really solid/stable, fix a 6mm solid cement board (Hardibacker), or if you want to save money longterm, use a 10mm insulation tile backer board (Jako). The insulation board will save you money as the heat from the UFH will go up, not down.
    As above, I would use a 5mm screed of levelling compound over the top of any boarding once the UFH has been laid, as it encapsulates the UFH and allows for easier and a better tile bond with reduced chance of damage and good heat transmission. Screeding can be difficult for an amateur, so I would advise asking a tiler who has done this before.
    Adhesive is fine. Any S1 adhesive will do the job, but mix it properly and use standard set if you are new to the job. Don't forget to prime floor substrates if you are using levelling compound as it can dry and pin-hole bubble/crack.
     
    Last edited: Apr 16, 2019
  4. Kcoh

    Kcoh Active Member

    Location:
    Coventry
    I have a spare mapei SLC bag around but dread increasing the floor level anymore. I was told it’s just to protect the wires from getting damaged during the troweling?
     
  5. Kcoh

    Kcoh Active Member

    Location:
    Coventry
    Thank you very much for your comprehensive advise. I have tried slc before and you are right, it needs to be done by a professional. I already have the 10mm boards and for the floor, I purchased rapid set S1 adhesive, I can replace it with slow set. Thanks again.
     
  6. Huddersfield Tiling

    Huddersfield Tiling Huddersfield Tiling

    Location:
    Huddersfield
  7. Huddersfield Tiling

    Huddersfield Tiling Huddersfield Tiling

    Location:
    Huddersfield
    I cannot emphasise enough that the subfloor (the bare floor) needs to be stable before over-boarding. This means making sure that there is no movement at all before boarding over it. Once this is good, lay the 10mm insulation panels with washers every 300mm, staggering the boards so that no 4 corners meet (in a brick pattern). Then ask a tiler to do the screeding and if you have the money, tiling!
     
  8. Kcoh

    Kcoh Active Member

    Location:
    Coventry
    What primer do you recommend for the floorboards? Thanks
     
  9. Huddersfield Tiling

    Huddersfield Tiling Huddersfield Tiling

    Location:
    Huddersfield
    I use Ultra Pro Primer, but any primer designed for use with tiles is fine. Maybe stick with Mapei products as you are using their adhesive. Mapei EcoPrim, I think it's called?
     
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