Grout Joints for Large Format Tile
Large tiles give you so much design freedom. The 12 x 24 is the new 12 x 12. And tile as large as 48” is becoming common. But large tile can be challenging to install. Large format tile installation needs to be considered differently from regular tile installation. That includes grout joints too.
GROUT JOINT SIZE FOR LARGE AND HEAVY TILE
All ceramic and stone large format tile (greater than 15”) requires a minimum 1/16” grout joint according to ANSI. Daltile recommends that large tiles have a 1/8” or 3/16” minimum grout joint for the most successful installation. The difference is not really noticeable visually, but can make a big difference to the quality of the installation.
GROUT JOINT FOR STAGGERED BRICK JOINT PATTERNS
If the stagger of the brick joint pattern will be greater than 18”, ANSI and Daltile recommend that the offset not be greater than 33% to avoid unevenness. Daltile also recommends a minimum grout joint of 3/16” to decrease any unevenness in large and heavy tile installations.