As a general rule floor tiles should have grout lines of 1 8 inch or larger depending on the type and size of tile.
Grout size for 12x24 wall tile.
Note that using the smallest grout possible will increase installation time.
The wider spacing will help to accommodate placement of tile and maintaining straight lines.
Using 12x24 tiles in bathroom should tile run same direct.
Tile trowels come in many shapes and sizes generally starting out from a 3 16 v notch up to the 1 2 square notch.
The tile council of north america and accompanying tile organizations recommend an average grout joint width of 3 16 inch for every 1 16 inch variation in the size of the tiles.
The difference is not really noticeable visually but can make a big difference to the quality of the installation.
Most floor tiles are 8 inches by 8 inches but larger versions are available.
Special types such as slate or quarry tiles often do not have edges uniform enough to look good with tight spacing.
Also make sure you get a quality tile since 12 x 24 is a very large tile and i ve seen a lot of breakage with cheaper tile done by inexperienced tilesetters.
If smaller spacers like 1 8 are used it will accentuate the size difference of handmade tile.
Grout lines for floor tiles.
Grout that is insufficiently packed into the joint.
Facial dimensions of the tile is 1 8 the actual grout joint will need to be 3 16.
What grout line size shoud i use for a 12 x 24 shower wall tile.
Daltile recommends that large tiles have a 1 8 or 3 16 minimum grout joint for the most successful installation.
Finished grout lines will vary from 1 16 to 3 16.
If insufficient force is used while grouting wall tile it is easy to bridge the joint where the grout does not penetrate to the back of the joint.
Tcna recommends a minimum 1 8 grout joint for rectified tile and minimum 3 16 grout joint for calibrated tile.
For example if you take two 12 inch tiles and compare them side to side and there is a variation of 1 16 inch in the two tiles you are recommended to use at least a 3.
With your 12 24 tiles you should use a 1 2 notched trowel on the wall and back butter each tile but just with a skim coat.
Let s talk about grout size options.
This movement can cause the grout to crack and if sufficiently severe can cause tile to crack.
They also suggest adding to this width.