The secret no professional will tell you is there is really no set or absolute proper size for your grout lines.
Marble tile grout line size.
Finished grout lines will vary from 1 16 to 3 16.
First the smallest grout lines less than 1 8 inch are ideal for rectified tiles.
Most floor tiles are 8 inches by 8 inches but larger versions are available.
Let s talk about grout size options.
Actual finished grout spaces will vary from 1 8 to 1 4 if 3 16 spacers are used.
Rectified tiles are perfectly uniform with precisely defined edges requiring the least amount of grout.
Push the grout into the grout joints with the tip of.
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.
Minimum grout lines the quick answer is nothing closer than 1 16.
The size of grout lines for tile is something that comes up on almost every tile installation.
Grout including sealed grout tends to wear more quickly than tile and become more porous and prone to staining.
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.
Grout polished marble with tight joints up to 1 8 inch with nonsanded grout since sanded grout will scratch the surface of the marble.
Facial dimensions of the tile is 1 8 the actual grout joint will need to be 3 16.
Marble is a cut product manufactured to extremely tight tolerances and usually designed to be installed with 1 16 spacing.
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.
If you want to know why please keep reading.
They also suggest adding to this width.
Tcna recommends a minimum 1 8 grout joint for rectified tile and minimum 3 16 grout joint for calibrated tile.
Note that using the smallest grout possible will increase installation time.
Special types such as slate or quarry tiles often do not have edges uniform enough to look good with tight spacing.
All other cuts of tile from tumbled to chiseled to punched contain slight variations in shape and size.
The wider spacing will help to accommodate placement of tile and maintaining straight lines.
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 lines for floor tiles.