First step: Tear out all subway tile wire mesh and take out tub. We were able to carry the tub out but most times you have to break it apart with a sledge hammer. Step 3: Install 5/8 plywood on floor, install shower liner with 2 inch p trap and drain.Install single handle deverter with half inch cooper pipping. Install concrete board tape seams and seal with thinset.Pour concrete for floor and pitch toward drain.Get inspection by city. Inspection passed.Tile with 12×12 floor tile for floor and 3×6 subway tile and corner cap pieces on wall.Grout and install shower cover,and spout. Paint bathroom.Get final inspection.