What size grout joint do you recommend?
Laying tiles without a grout joint is definitely NOT recommended, and highly impractical for exteriors.
When organising a modular layout with different sized formats, the size of the grout joints should be:
- 2 mm for rectified tiles and rectified modular products
- 3-4 mm for non-rectified tiles
- 4-6mm for non-rectified modular products