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Discuss Porcelain Tiles Cracking in the Tiling Forum area at TilersForums.co.uk.

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  1. jonnyc

    jonnyc Trusted Advisor Professional Tiler JOTM Winner JOTY Winner

    Location:
    hersham surrey
    did a porcelain floor just before Xmas .client calls me this week to say that tiles cut around external corners have cracked .been round and they have too even with ditra underneath . Anyone know why this happens . It is certainly not the first time . I really don't think I should be responsible for putting this right , these particular tiles were on sale at b&q but others in past have come from reputable tile suppliers
     
  2. JulianSidney

    JulianSidney Trusted Advisor Professional Tiler Top Contributor

    Location:
    ramsey, essex
    The internal cut in the tile is to Sharpe, it becomes a stress point.
    Ideally this should be a curved radius so any load or stress in or on the tile has no easy place to start if it wants to fail. The ditra has no effect on this I believe.
    Hope that makes sense Jonny
     
    • Like Like x 3
  3. Plan Tec Tiling

    Plan Tec Tiling Administrator Staff Member Trusted Advisor Professional Tiler JOTM Winner

    Location:
    Wimborne, Dorset
    Sounds strange!? Was it over UFH Jonny?
     
  4. 3_fall

    3_fall Administrator. Staff Member Trusted Advisor Professional Tiler JOTM Winner Top Contributor

    Location:
    SW London
    Hey Jonny,
    Hope you're good mate.
    Is it just tiles with an 'L' cut?
    I had this few months ago, there was too much tension in the tile,
    They broke, one after another, got a new batch, they were fine.
    I was informed they'd been overfired causing too much surface tension.

    Who's too quick now @JulianSidney@JulianSidney! Haha
     
    • Like Like x 1
  5. jonnyc

    jonnyc Trusted Advisor Professional Tiler JOTM Winner JOTY Winner

    Location:
    hersham surrey
    I get that it's a stress point but do you think it is the quality of the tile that causes this.it could be very costly if it happens few years down the lines and can't get replacements and I was blamed for the cracking . I wonder how I would stand if a client tried to sue me .?it has nothing to do with the tiling in my view
     
  6. antonio

    antonio Trusted Advisor Professional Tiler JOTM Winner

    Location:
    italy
    julian exactly.
    pierce point intersection with milling cutter 10.8 mm :)
     
    • Like Like x 2
  7. JulianSidney

    JulianSidney Trusted Advisor Professional Tiler Top Contributor

    Location:
    ramsey, essex
    I expect the quality of tile does not help, but as @antonio@antonio says, mill corner out to a radius or drill corner first with, say a 10 mm bit and cut to corner. This would be the 'material engineers' advice if you were to ask one.
    This should done on internal cut on tiles, but who does it? I will use the grinder to put a radius in corner, lazy, yes! But have only had one go in may may years .
     
    • Like Like x 4
  8. antonio

    antonio Trusted Advisor Professional Tiler JOTM Winner

    Location:
    italy
    • Like Like x 9
  9. JulianSidney

    JulianSidney Trusted Advisor Professional Tiler Top Contributor

    Location:
    ramsey, essex
    • Like Like x 1
  10. jobdone

    jobdone Active Member

    Location:
    Chobham
    Drilling holes in corners works the same on steel. Reduces stress and cracking. (Previous life was a stellar fabricator)
     
    • Like Like x 2
  11. Aston

    Aston Trusted Advisor Professional Tiler

    Location:
    .
    tiling, engineering, corner of windows and doors etc
    Its all physics. Energy from pressure or impact will have reduced affect if it travels around a curve rather than sharp 90 degree turn.
     
    • Like Like x 1
  12. Chalker

    Chalker Trusted Advisor Professional Tiler JOTM Winner

    Location:
    Tadcaster
    • Agree Agree x 1
  13. jonnyc

    jonnyc Trusted Advisor Professional Tiler JOTM Winner JOTY Winner

    Location:
    hersham surrey
    Thanks for the advice . All makes sense .i need to get up to speed on porcelain. So used to fixing stone for last 30 years and don't seem to have same problem .were now doing loads or porcelain and I guess that even though we know how to fix a dead flat rectified floor there are other considerations.
     
    • Like Like x 1
  14. Protiler 68

    Protiler 68 Professional Tiler

    Location:
    South east/kent
    Everythings porcelain now,its getting ,harder ,as well ,have to learn about stress points ,guys on here will help ,
     
  15. pjc

    pjc Trusted Advisor Professional Tiler

    Location:
    high wycombe
    have seen it a quite a few times stone as well.
     
  16. jobdone

    jobdone Active Member

    Location:
    Chobham
    Not to sure if I was stellar should be steel fabricator
     
  17. GaryTheTiler

    GaryTheTiler Trusted Advisor Professional Tiler JOTM Winner

    Location:
    Stevenage
    How tight are you cuts ? And are they cut to wooden frames ?
     
  18. Markltile

    Markltile Tiler

    Location:
    ROI
    How did you get on with this job jonnyc? I just looked at a job yesterday that I done a month ago and the very same thing has happened with a 60x60 glazed porcelain, I have layed loads if this type of tile in the same way Over the years and this is a first for me, tiles were hard to split on the sigma does anyone know could this be related to the cracking?
     
  19. jonnyc

    jonnyc Trusted Advisor Professional Tiler JOTM Winner JOTY Winner

    Location:
    hersham surrey
    think its just one of those things that are meant to haunt us. just luck whether they crack or not .what pisses me off is that client thinks it is fixer fault not the tile
     
  20. John Benton

    John Benton Trusted Advisor Professional Tiler JOTM Winner

    Location:
    Leeds
    So if the brakes fail on your car and you hit another car it's your fault. Who do they blame when the washing machine breaks down? The guy who delivered it?
     
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