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Discuss Trowel size for 22mm sandstone flags in the Natural Stone and Thin Porcelain Tiling area at TilersForums.co.uk.

  1. M1d1

    M1d1 Member of Tilers Forums

    Hi,
    I am unsure what size trowel to use for the flagstone I have to lay in the hallway. They are 'calibrated' to around 22mm, going to be laid on benfer leaderflex, The substrate is the old tiles which are set in concrete and will be primed for the new adhesive. It is very level and good to go. What trowel would you suggest?
     
  2. jcrtiling

    jcrtiling Professional Tiler TTA Member Top Contributor

    Location:
    Salisbury
    What sort of size are they width and length .
     
  3. M1d1

    M1d1 Member of Tilers Forums

    Hi
    They are as follows
    900 x 600
    600 x 600
    600 x 300
     
  4. Andystiletiling

    Andystiletiling Professional Tiler

    Location:
    Burnley
    Laid similar last week..12mm trowel and back skim every piece
     
    • Agree Agree x 1
  5. M1d1

    M1d1 Member of Tilers Forums

    Thanks for the information, so going on a 12mm notched with the adhesive spread in the opposite direction on the stone.
    Is there any advantage or disadvantage to using a half round trowel for this?
     
  6. Andystiletiling

    Andystiletiling Professional Tiler

    Location:
    Burnley
    12mm on the floor then use the flat edge of the trowel to skim the backs of the stone. You will find although it says the stone is calibrated the backs will not be flat, skimming the back not only gives better adhesion it also fills any voids and dips in the backs of the pavers..
    I use a square notch but shouldn't really make much difference.
    Good luck
     
  7. M1d1

    M1d1 Member of Tilers Forums

    I'm thinking about 10 or 12mm for the grout.
    Which sealer would you recommend?
     
    Last edited: Jul 8, 2018
  8. Andystiletiling

    Andystiletiling Professional Tiler

    Location:
    Burnley
    Tend to use lithofin stainstop for more or less everything.
    Didn't use spacers just rack of eye but joints were probably about 10mm give or take
     
  9. Andystiletiling

    Andystiletiling Professional Tiler

    Location:
    Burnley
  10. M1d1

    M1d1 Member of Tilers Forums

    Looks very similar to what is going down. What grout did you use, I have a buff coloured brush in type. Or should I save that for outside and use normal gear?
     
  11. Andystiletiling

    Andystiletiling Professional Tiler

    Location:
    Burnley
    That's ultra grey, looks a bit dark cuz had only just given it a final seal, I actually took the time to mask every joint before grouting, quick tickle over with the sponge then removed masking tape and didn't touch it again. Saved a lot of wash up time and left joints nice and full ;)
     
  12. Andystiletiling

    Andystiletiling Professional Tiler

    Location:
    Burnley
  13. M1d1

    M1d1 Member of Tilers Forums

    Ha, I would so mess that up. Did you seal the stone before grouting or do it all together at the end?
     
  14. Andystiletiling

    Andystiletiling Professional Tiler

    Location:
    Burnley
    Sealed twice before grouting then once after. Soaks up sealer like a sponge
     
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