Special types such as slate or quarry tiles often do not have edges uniform enough to look good with tight spacing.
Marble subway tile grout line.
If smaller spacers like 1 8 are used it will accentuate the size difference of handmade tile.
We recommend a 3 16 grout size for our ceramic tile line.
Grout lines for floor tiles.
For most granite and marble tile i install i use either 1 32 or 1 16 inch grout lines.
How to grout marble tile.
Because of this minimizing the width of grout lines is advisable.
Note that using the smallest grout possible will increase installation time.
Grout including sealed grout tends to wear more quickly than tile and become more porous and prone to staining.
In most other tile i will use 1 16 or 1 8 inch lines.
This thickness leaves room for the natural variation in.
The best thing to do is use the smallest grout line your particular tile will allow and get a grout that closely matches the tile.
Most floor tiles are 8 inches by 8 inches but larger versions are available.
I try to use the smallest grout lines the tile will allow.
If you are going for high contrast or retro style wider grout spacing gives you the opportunity to make a statement with your grout.
This is true of man.
As a general rule floor tiles should have grout lines of 1 8 inch or larger depending on the type and size of tile.