In retrofits or renovation tiling, the project usually requires removal of old tile or subpar materials. The goal is to prep the space enough to properly install the tile.
Repairing old walls or floors sometimes requires new or build out sections of wall or making sure a floor is properly level. New subfloor may be required if floors are not up to par for tiles.
Tiling - The End Result
When tiling, it is vital that lines of tiles remain level and flat. This stage is instrumental in the final result of all tiling projects.