All ceramic and stone large format tile (greater than 15”) requires a minimum 1/16” grout joint according to ANSI. Basilea Grey Rectified Floor Tiles from Tile Mountain only £5.76 per tile or £15.99 per sqm. Namely, the precision-cut edges and sharp corners of rectified porcelain make very thin grout lines possible, as the tiles can sit much closer together (as little as 1/16 th of an inch). With the rise in popularity of long porcelain planks, even though the edges of such tiles may be rectified and the tiles may not have any wedging, the widening of the grout joint width may be necessary to address any inherent warpage that those products tend to display along an edge or diagonal due to their elongated shapes. Medium-sized grout line widths — 1/8 to 1/4 inch — require the use of sanded grout and are... Large Grout Joints. Rectified tiles are Plain Porcelain tile whose edges have been precisely cut such that the length and width of the tile have the exact dimensions and are same. Rectified Tile Installation Preparation. A small grout line width, about 1/16 inch, is possible if the flooring tile is consistent in size (also called a rectified tile as mentioned above). This means larger grout lines, 3/16 inch for example, are necessary to achieve a polished look without emphasizing these variations. There are primarily two reasons for a rectified tile: a larger tile size (i.e., greater than 15" or 16" in any direction) and minimal grout lines. So in general there is not a specific standard for the size of a grout joint especially when you consider what a large tile is and there being no reference to rectified tile. When Do You Need a Rectified Tile? A rectified edge allows for smaller grout lines because the tile has been more precisely cut (unlike our other handmade tiles).There is less irregularity with rectified tiles, so less spacing is needed between each piece. This would be immediately noticeable and unattractive. To simplify: Rectified tiles, regardless of size, shall have a grout joint width no less than 1/8". The reason for this is that the allowable warpage for a tile based on ANSI specifications can create an installation issue when large format rectangular tiles are installed in a brickwork/running bond pattern. In response, the new TCNA (Tile Council of North America) Handbook addresses this issue by recommending that the width of the grout joint used be determined by the ANSI A108.02 specification which states that the actual grout joint size shall be at least 3 times the actual variation of facial dimensions of the tile. Note the side where no regular border appears; that's where the tile was cut. Rectified tiles generally allow for thinner grout lines at least 1/8”. In order to minimize size variation from one tile to another, more than what can be achieved by calibration alone, a tile can be rectified. Because the installation of rectified tiles is generally done with a tight grout joint, with only a sliver of grout separating them, the subtle differences between each tile can be magnified, resulting in a less than perfectly flush look. This mechanical finishing most commonly includes the use of pre- Due to this precision, rectified tiles are the perfect choice for fitting with a finer grout joint creating a clean, even and seamless finish. So, for those that aren’t a fan of the “natural look” or “classic look”, rectified tile grout lines will do wonders. As stated, the grout is rectified porcelain ceramic tile so there isn't a pillowed edge. Although it is ultimately up to you how wide you make your grout lines, there are a few guidelines when it comes to achieving the perfect look: First, the smallest grout lines, less than 1/8 inch, are ideal for rectified tiles. Back to Flooring & Floor Covering Next topic | Previous topic. 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