Your talking about doing a old fashion mud job. Make sure you have slop to center of drain. Its a sand cement mixture with the consistency of motar. This is old school. But the best. Especially on walls. Where you put up the ribwire attached to the studs. You can get the walls perfectly level before tile setting. If i'm not mistake the top coat would be a sand/cement mixture with masonary lime add to it. This has been pretty much replaced with the invention of cement board.:thumbsup: On the tile pan. Its pretty much ditra these days.:yes: