R
Raja
being a professional cowboy i often packed out tiles with white star to thickness which u lot just wud not believe 
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Is that the word of the day kev...........:lol:
I think its both.Kev, I thought planametric tolerances were to do with a variation in sizes of the tiles, rather than bending of tiles. Bristish Standards say that tiles can vary by such and such amount (what ever it may be) = planametric tolerances?