There are some guidelines that need to be followed but the actual size is more of a personal choice than it is a set width.
Marble tile grout line size.
Minimum grout lines the quick answer is nothing closer than 1 16.
Grout polished marble with tight joints up to 1 8 inch with nonsanded grout since sanded grout will scratch the surface of the marble.
First the smallest grout lines less than 1 8 inch are ideal for rectified tiles.
When re modeling floors bathroom or a kitchen almost everybody wants to have the minimum grout lines between their tiles.
Facial dimensions of the tile is 1 8 the actual grout joint will need to be 3 16.
The size of grout lines for tile is something that comes up on almost every tile installation.
Because of this minimizing the width of grout lines is advisable.
They also suggest adding to this width.
As a general rule floor tiles should have grout lines of 1 8 inch or larger depending on the type and size of tile.
Let s talk about grout size options.
Marble is a cut product manufactured to extremely tight tolerances and usually designed to be installed with 1 16 spacing.
The secret no professional will tell you is there is really no set or absolute proper size for your grout lines.
Note that using the smallest grout possible will increase installation time.
Tcna recommends a minimum 1 8 grout joint for rectified tile and minimum 3 16 grout joint for calibrated tile.
All other cuts of tile from tumbled to chiseled to punched contain slight variations in shape and size.
A higher quality tile could allow for a 1 16 or 1 8 grout line and maybe even a brick layout as lippage may not be an issue in a perfect tile world where as a lower quality tile might have major lippage risk so laying the tile in 1 3 s and having a 1 4 grout line is recommended.
Special types such as slate or quarry tiles often do not have edges uniform enough to look good with tight spacing.
Grout lines for floor tiles.
Generally sanded and unsanded grout should never be mixed and absolutely never with marble or any other surface that can be scratched by the sand in grout note.
Actual finished grout spaces will vary from 1 8 to 1 4 if 3 16 spacers are used.
Push the grout into the grout joints with the tip of.
Rectified tiles are perfectly uniform with precisely defined edges requiring the least amount of grout.
If you want to know why please keep reading.
The wider spacing will help to accommodate placement of tile and maintaining straight lines.
If smaller spacers like 1 8 are used it will accentuate the size difference of handmade tile.