To achieve good adherence, you must glue the tiles with a mixed bonding glue, i.e. cement and resin, which gives good chemical adherence. Traditional adhesives do not provide sufficient adherence for porcelain stoneware.
How to make a floor plan:
With the help of a tape measure, measure the long side and the short side of your bathroom.
Create a simple drawing and write down the measures.
Also add structures: doors, windows and sanitary items.
If you want you can also add measures for doors and windows and their distance from the wall.
If you want to remove any sanitary ware please mark with an X.
The more information you add, more accurate your bathroom will be.