Unfortunately the tub drain still leaks but I decided to tile the second half of the bathroom instead of taking it apart again first.
The wall near the sink plumbing was not square. Squaring the tile with the brick wall meant cutting partially diagonal tiles to fill the narrow space.
I think the sink and the wall tile will camouflage this area though.
I had extra mortar when I finished the tile in the bathroom so I started the tiling on the edge of the slab.This area is xps foam with an air barrier made of painted roofing tape. I used Kerdi membrane narrow banding mortared to the top of the air barrier. and I laid tile over that. I will use the epoxy grout here. The grout was specifically purchased for this border as I read that it is a good grout to use over foam.
When I turned the corner I did not recognize that I hadn’t laid the Kerdi there yet. So several tiles were installed without the Kerdi then I finished using up the mortar laying a strip of Kerdi again. I will be able to see if there is a difference in performance for the area that is missing the Kerdi underlayment.
It will be a big job to lay these tiles all around the border of the slab where it meets the foundation wall. But it was worth it to have the foam insulate the sides of the slab all the way to the top.