Grout including sealed grout tends to wear more quickly than tile and become more porous and prone to staining.
Marble subway tile grout line.
For most granite and marble tile i install i use either 1 32 or 1 16 inch grout 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.
We recommend a 3 16 grout size for our ceramic tile line.
Special types such as slate or quarry tiles often do not have edges uniform enough to look good with tight spacing.
I try to use the smallest grout lines the tile will allow.
This thickness leaves room for the natural variation in.
Grout lines for floor tiles.
How to grout marble tile.
In most other tile i will use 1 16 or 1 8 inch lines.
Thinner grout spacing for subway tile creates a more subtle effect and wider grout lines a more dramatic one.
Finished grout lines will vary from 1 16 to 3 16.
Most floor tiles are 8 inches by 8 inches but larger versions are available.
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.
Because of this minimizing the width of grout lines is advisable.
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.