Tolerance on ceramic tiles?

Discussion in 'UK DIY' started by The Medway Handyman, Jul 17, 2011.

  1. Tiled a bathroom recently, 25 cm x 33 cm ceramic tiles, supplied by
    customer who got them from Topps Tiles.

    Started using box 3 & found the horizontal grout line going out of
    kilter. Row beneath was perfect.

    Measured the tile & it was over size by a good 2mm.

    Boxes 4, 5, 6 & 7 were fine.

    Not come across this before. Very slight variations yes, but not that much.

    What would be the tolerance on a ceramic tile +/-?




    --
    Dave - The Medway Handyman www.medwayhandyman.co.uk
     
    The Medway Handyman, Jul 17, 2011
    #1
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  2. The Medway Handyman

    harry Guest

    On Jul 17, 4:47 pm, The Medway Handyman <>
    wrote:
    > Tiled a bathroom recently, 25 cm x 33 cm ceramic tiles, supplied by
    > customer who got them from Topps Tiles.
    >
    > Started using box 3 & found the horizontal grout line going out of
    > kilter.  Row beneath was perfect.
    >
    > Measured the tile & it was over size by a good 2mm.
    >
    > Boxes 4, 5, 6 & 7 were fine.
    >
    > Not come across this before.  Very slight variations yes, but not that much.
    >
    > What would be the tolerance on a ceramic tile +/-?
    >
    > --
    > Dave - The Medway Handymanwww.medwayhandyman.co.uk


    Dunno but that sounds pretty duff. I supposeyou can cut them up for
    round the edges.
     
    harry, Jul 17, 2011
    #2
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  3. The Medway Handyman

    Chris Hogg Guest

    On Sun, 17 Jul 2011 16:47:23 +0100, The Medway Handyman
    <> wrote:

    >Tiled a bathroom recently, 25 cm x 33 cm ceramic tiles, supplied by
    >customer who got them from Topps Tiles.
    >
    >Started using box 3 & found the horizontal grout line going out of
    >kilter. Row beneath was perfect.
    >
    >Measured the tile & it was over size by a good 2mm.
    >
    >Boxes 4, 5, 6 & 7 were fine.
    >
    >Not come across this before. Very slight variations yes, but not that much.
    >
    >What would be the tolerance on a ceramic tile +/-?


    BS EN 14411 has all the specifications etc. for ceramic tiles.
    Download a copy here http://www.mediafire.com/?mjyg3a4z4pln3xh

    Almost certainly you want the specs for dry pressed tiles, but whether
    Annexes G, H, J or K depends on your specific tiles, although I think
    the dimensional requirements are all the same regardless of porosity
    (water absorption, E, % by wt.). The first table in each annex gives
    the dimensional tolerances; they depend on individual tile area (pages
    34, 37, 40, 43, respectively).

    --

    Chris
     
    Chris Hogg, Jul 17, 2011
    #3
  4. The Medway Handyman

    Chris Hogg Guest

    On Sun, 17 Jul 2011 18:06:56 +0100, Chris Hogg <> wrote:

    >On Sun, 17 Jul 2011 16:47:23 +0100, The Medway Handyman
    ><> wrote:
    >
    >>Tiled a bathroom recently, 25 cm x 33 cm ceramic tiles, supplied by
    >>customer who got them from Topps Tiles.
    >>
    >>Started using box 3 & found the horizontal grout line going out of
    >>kilter. Row beneath was perfect.
    >>
    >>Measured the tile & it was over size by a good 2mm.
    >>
    >>Boxes 4, 5, 6 & 7 were fine.
    >>
    >>Not come across this before. Very slight variations yes, but not that much.
    >>
    >>What would be the tolerance on a ceramic tile +/-?

    >
    >BS EN 14411 has all the specifications etc. for ceramic tiles.
    >Download a copy here http://www.mediafire.com/?mjyg3a4z4pln3xh
    >
    >Almost certainly you want the specs for dry pressed tiles, but whether
    >Annexes G, H, J or K depends on your specific tiles, although I think
    >the dimensional requirements are all the same regardless of porosity
    >(water absorption, E, % by wt.). The first table in each annex gives
    >the dimensional tolerances; they depend on individual tile area (pages
    >34, 37, 40, 43, respectively).



    I should have added that, assuming I'm reading the table correctly and
    my maths is OK, the tolerances on your tiles would appear to be +/-
    1.5 mm on the 250 mm side and +/- 1.98 mm on the 330 mm side (0.6% on
    the work size), so your 2 mm oversize would seem to be within spec.

    --

    Chris
     
    Chris Hogg, Jul 17, 2011
    #4
  5. The Medway Handyman

    Chris Hogg Guest

    On Sun, 17 Jul 2011 18:38:10 +0100, Chris Hogg <> wrote:


    >
    >I should have added that, assuming I'm reading the table correctly and
    >my maths is OK, the tolerances on your tiles would appear to be +/-
    >1.5 mm on the 250 mm side and +/- 1.98 mm on the 330 mm side (0.6% on
    >the work size), so your 2 mm oversize would seem to be within spec.

    ^^^^^^^^^^^^^^^^^^
    Sorry, brain failure there, try 'would seem to be just out of spec'.

    --

    Chris
     
    Chris Hogg, Jul 17, 2011
    #5
  6. The Medway Handyman

    Tim Watts Guest

    The Medway Handyman wrote:

    > Tiled a bathroom recently, 25 cm x 33 cm ceramic tiles, supplied by
    > customer who got them from Topps Tiles.
    >
    > Started using box 3 & found the horizontal grout line going out of
    > kilter. Row beneath was perfect.
    >
    > Measured the tile & it was over size by a good 2mm.
    >
    > Boxes 4, 5, 6 & 7 were fine.
    >
    > Not come across this before. Very slight variations yes, but not that
    > much.
    >
    > What would be the tolerance on a ceramic tile +/-?
    >
    >
    >
    >


    1/2mm on the lot I had.

    --
    Tim Watts
     
    Tim Watts, Jul 17, 2011
    #6
  7. The Medway Handyman

    Andrew May Guest

    On 17/07/2011 18:46, Chris Hogg wrote:
    > On Sun, 17 Jul 2011 18:38:10 +0100, Chris Hogg<> wrote:
    >
    >
    >>
    >> I should have added that, assuming I'm reading the table correctly and
    >> my maths is OK, the tolerances on your tiles would appear to be +/-
    >> 1.5 mm on the 250 mm side and +/- 1.98 mm on the 330 mm side (0.6% on
    >> the work size), so your 2 mm oversize would seem to be within spec.

    > ^^^^^^^^^^^^^^^^^^
    > Sorry, brain failure there, try 'would seem to be just out of spec'.
    >

    Alternatively they are in spec with the large ones being 1mm too large
    and the small ones being 1mm too small. Both within 0.6% of the average
    size.
     
    Andrew May, Jul 18, 2011
    #7
  8. "The Medway Handyman" <> wrote in message
    news:5uDUp.5227$2...
    > Tiled a bathroom recently, 25 cm x 33 cm ceramic tiles, supplied by customer who got
    > them from Topps Tiles.
    >
    > Started using box 3 & found the horizontal grout line going out of kilter. Row beneath
    > was perfect.
    >
    > Measured the tile & it was over size by a good 2mm.
    >
    > Boxes 4, 5, 6 & 7 were fine.
    >
    > Not come across this before. Very slight variations yes, but not that much.
    >
    > What would be the tolerance on a ceramic tile +/-?
    >
    >
    >
    >
    > --
    > Dave - The Medway Handyman www.medwayhandyman.co.uk



    Were they all the same batch number ?

    In theory you're supposed to check batch numbers for uniformity
    of colour although apparently even that can fail if a box
    is near the start or finish of a batch. <guess> Presumably they
    mix each batch in skip size buckets and that's what the numbers
    refer to.</guess>

    Slight variations in dimension will probably be the result
    of different degrees of shrinkage owing to slight differences
    in the chemical composition of the clay. Which may vary
    slightly from batch to batch, the degree depending on production
    costs - final sale price etc.


    michael adams

    ....
     
    michael adams, Jul 18, 2011
    #8
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