These joints in the tile should never be narrower than the structural joint.
Floor ceramic tile expansion joint.
The tcna handbook recommends allowing for expansion and contraction in every tile installation.
Caulk the grout gap between two adjacent rows of tile all the way across the floor.
Install the caulk after the tiles have been set and before the grout is installed.
Joints must also be formed within the tile field every 12 to 16 feet in each direction for exterior floors and for interior floors exposed to sunlight.
For larger areas the movement joints will be visible.
Tile expansion joints tile doctor ceramic porcelain and stone tile expands and contracts with thermal and moisture changes in the environment.
Also known as soft joints.
Simply put a movement joint is a gap or space next to a tile that lets a tile floor move a bit.
Learn all about expansion joints here.
In small rooms a gap at the perimeter of the room often hidden by baseboard or shoe molding is sufficient.
Expansion joints in the floor if the ceramic tile floor is wider or longer than 25 feet you will need to install an expansion joint near the center of the floor.