This most often occurs with wall tile.
Tile grout issues.
Known as efflorescence white stains appearing on the surface of tiles is caused by water penetration underneath stone or tiles.
Grout cracks caused by improper tile installation or a loose subfloor are often fairly major.
Grout discoloration is often the first sign that there is a moisture problem on a tile floor.
White residue stains on tiles.
Efflorescence is generally a porous tile issue however it clusters of the crystals often appear on grout joints due to grout being a highly porous substance.
The worst possible scenario is that the substrate.
The minerals in the water crystalise which results in white residue appearing on the surface of tiles.
In practice it isn t.
Grout tends to be more porous than tile and so provides an easier pathway for moisture to travel beyond its bounds.
Typically the most common causes are as follows.
Grout is a very porous.
You must remove loose or hollow tiles and fix the installation or subfloor problem.
Cracks in your grout can be caused by a number of issues.
Ideally grout has a consistent coloring from one side of the room to the other.
It is caused by moisture entering the grout either from above or below.
Improper cleaning of grout haze from the surface of the floor or wall or failing.
They are often found around loose or hollow tiles.
Common tile stone and grout problems.
Tapping a broomstick onto the tile tells if the tile has a hollow spot in the setting material.
Grout discoloration can occur when you add too much water to powdered grout during the initial tile installation.