Tolerences with quarry tiles

[Henry Lloydd]

Is it reasonable to be expected to achieve + or - 3mm flatness for 6" square quarry tiles over a complete floor. I am finding the odd tile falls outside this tolerance by 1mm. Looking at the tiles they are not perfectly flat like a ceramic tile. Some are bowed, presumably this is a natural consequence of the firing process.

 

[Dave]

Is it reasonable to be expected to achieve + or - 3mm flatness for 6" square quarry tiles over a complete floor. I am finding the odd tile falls outside this tolerance by 1mm. Looking at the tiles they are not perfectly flat like a ceramic tile. Some are bowed, presumably this is a natural consequence of the firing process.

It is yes. It’s the firing process