It s quite common to see controlled breaks in concrete and those are usually expansion joints.
Floor ceramic tile expansion joint.
Expansion control joints provide prefabricated caulk joint consisting of two solid extruded l angles with factory installed two part polyurethane sealant color to match grout joint color specified by architect.
Install the caulk after the tiles have been set and before the grout is installed.
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.
From what is a movement joint made.
Height to match tile stone or wood thickness.
Movement joints are filled with material that allows for contraction and expansion.
In two places the tile was tented to the point where i could put my hands one on top of the other underneath the tented tiles.
Caulk the grout gap between two adjacent rows of tile all the way across the floor.
Learn all about expansion joints here.
For floor applications urethane neoprene or polysulfide are most often used in traffic areas and silicone sometimes where traffic is not a concern.
If you tile over an expansion joint then you need to honor that joint in the tile as well.
It allows for movement in the tile.
An expansion joint is in the substrate for instance in concrete.
A movement joint is in the tile only.
Type of tile or glass.