The word “rectify” in itself conveys the thought of making something right or refining something. Thus, rectified tiles are those that have been mechanically finished on all sides after the firing process to make sure they are all precisely uniform in size or truly square. When tiles are cut prior to firing and then baked, as is usually done, there is more room for slight discrepancies in the tile size due to shrinking during the firing process.
The rectification process is many times used for larger tiles and sometimes when large and small tiles are used together in a pattern.
When rectified tiles are used in home décor it makes the gives the room a more modern edge. Rectified tiles are also called “sharp edge” tiles.
Tiles that are non-rectified are also known as “cushioned edge”, “non-rectified edge”, “soft edge”, and “pillow edge”. As can be imagined from the names, these types of porcelain tiles soften the look of a room.
The modern look created by rectified tiles is due to the fact that you can place the tiles much closer together at minimum spacing which is 1.5mm. This tighter joint space means that the grout lines are less visible, and even the amount of grout used throughout the installation is much less.
When wider grout joints are used, the grout is no longer merely used to keep the tiles in place but it actually becomes part of the décor. Moreover, if the grout does not fit in with the overall scheme it can greatly reduce the aesthetic appeal of the design. Another factor is that if the grout becomes stained, dirty, or discolored, this too will detract from your design.
However, rectified tiles will generally cost a bit more. This is because of the extra step of cutting the tiles down to size.