You will lay out your first tile directly on this line and your.
Tiling out of plumb walls.
A batten board helps you start your bottom most course or row of tiles.
I know smaller tiles will not look good but if tiles were larger like would this help mask the problem.
Check your floor for level and walls.
Do you stack the tile.
Hang a batten board to prevent tile slippage.
Measure the wall where you will place the tiles.
I hesitate to bring this point up but i think guess your walls are out of plumb because you capped the metal upturn flange of the tub with the cement board.
How to deal with out of plumb walls for tile.
Find the midline of the wall from ceiling to floor and mark it with a chalk line.
So you ve got that bottom row of tile.
Tips for tiling a wall 1.
If this is not the case then forget i brought it up.
How do we deal with that doing tile.