What is the difference between rectified and non-rectified tiles?
Rectification is a process that affects the edges of a tile. A mechanical process straightens the tile edges and ensures they are perfectly squared. So all the tiles are exactly the same size and can therefore be laid with a minimum grout joint of 2 mm.
Non-rectified tiles, on the other hand, are tiles with natural, uneven edges that require a wider grout joint. Unless it's clearly specified on our estimates, all porcelain and ceramics will be installed with 3/16th or 1/4" spacers or larger.