Our design team suggest you use Grout Colour 05 Shadow to compliment the light tones of the tile or Grout Colour 07 Grey to highlight the darker shades of the tile.
Recommended Grout Joints - (We have assumed that your substrate has a perfectly flat and plumb surface, please check with your tiler.)
3mm grout joint. Based on this joint size, 1 bag of grout would cover 9.5m².
