Now that you have a reference point you can be sure that the first row of tiles will be properly aligned.
How to lay ceramic tile on painted concrete floor.
Then use a square tool to check that the lines are perpendicular to one another.
Answer answer it is possible to bond porcelain tile to a painted surface but it isn t recommended because the overall tile attachment is limited to the strength of the bond of the paint to the concrete.
Use a chalk line to mark your starting point on the concrete floor.
Once the tiles are in place use a rubber hammer to set the tiles firmly into the adhesive.
Spread another 2 feet by 2 feet layer of tile adhesive beside the first and lay tiles on it in the same way.
You should either strip or bead blast the concrete and thoroughly clean it.
Use spacers for accuracy.
Begin adhering your first two rows of tile.
Allow the adhesive to dry thoroughly.
If you are new to tile installation use grout spacers to lay out and set your tile.
If the paint comes loose so does the tile.
Wipe up any glue that seeps up between tiles.