No need to Google. This came from Daltile, but it came to them from TCNA. Ask and you shall receive: Rectified Tiles What Is The Appropriate Grout Joint Width? Rectified tiles continue to increase in popularity, particularly in the commercial arena. For years, the industry and Dal-Tile have recommended that Rectified tiles can be installed with a 1/16" grout joint. However, from the contractorÂs perspective, installations have become more time consuming and difficult to ensure compliant installations when attempting to install a Rectified tile with a 1/16" grout joint. 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. To simplify: Rectified tiles, regardless of size, shall have a grout joint width no less than 1/8". As a result, Dal-Tile is changing its recommended grout joint width to be 1/8" for all of its Rectified tiles. In addition, we will no longer recommend in our literature that Rectified and Non-Rectified large format rectangle sizes (Ex: 12" x 24") can be installed in a brickwork or running bond pattern where the overlap is 50% [normal brick joint]. 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. This allowable warpage can create a scenario where lippage is inevitable given the overlapping pattern. To mitigate this effect, Dal-Tile will be removing the brickwork pattern from our catalogs and literature. This will be replaced by a new pattern that will be referred to as a "Staggered" brickwork pattern where the overlap does not exceed 33%, and the grout joint width must be a minimum of 3/16". Also-- grout was Mapei's Pearl Grey.

When I suggested running it the long way I was considering the best look for the bathroom beyond too. I like a long edge to run into the room. It will make less cuts by the tub too so the edge is tidier. I don't know how wide the hallway is but to me the layout looks very chopped up since there's only one full tile in each course. With the 1/3 offset that an amateur should probably use it will be even choppier. It will be one large format tile next to a sliver of the other. The pic Bill posted is beautiful, but it looks like the hall pattern follows the pattern that was chosen for a larger space. That's why I like the stacked pattern here, running the length of the hall and then continuing into the bathroom.

Thanks, everyone! Here's another factor I didn't mention... my contractor told me that my wall was really out of plumb... If he were to straighten up the walls, I'd lose 4" in width on the toilet back wall. I made a choice - maybe the wrong one - that I'd take unevenly cut floor tile over losing 4" in a narrow space. So, if the tiles go longways, opposite the floor planks, the "off" cuts would be the long part of the tiles, and probably significantly more obvious than if the short end of tiles are cut... That may end up being my deciding factor.

I haven't used that large a tile, but I did a google search and here's a link to an image (scroll down for the herringbone layout): https://www.lowes.com/pd/Style-Selections-Mitte-Gray-12-in-x-24-in-Glazed-Porcelain-Tile/3799717 And another: https://www.daviemactile.com/tile-blogger/tile-patterns-and-its-names