What is included in tiling a shower?
A complete shower tile installation includes demolition and haul-away, framing and subfloor inspection and repair, a sloped shower pan, a waterproofing membrane on pan and walls, tile layout and setting, grouting, sealing and silicone at every change of plane.
Any of those can be left out to reduce a quote. The two most commonly left out are the substrate repair and the waterproofing — and they are the two that decide whether the shower lasts.

