Shower Niche Tile Layout Mistakes to Check Before the First Tile Goes Up

On a bathroom remodel, I once caught a layout problem after waterproofing was done but before tile went up. The niche was framed correctly and passed the flood test, but the client picked a 12x24 wall tile after the rough-in. When we dry-laid the first course, the niche edge landed right on a skinny cut and the grout line would have died halfway through the niche. Technically it would have…