Floor to ceiling is chic, but tile wainscotting also makes an impact. This guide will help you decide how high to tile in your bathroom. The minimum code height for a tub or shower enclosure’s water proof covering is 6' above the finished floor height. A practical height, when working with full sized 12” tiles is 6 courses. This results in a height that meets the minimum with a bit to spare when the grout lines are factored in.