What is the minimum thickness of mud one could safely use on a shower seat (providing I'm using the 4-1 sand/portland mix)?
The seat I'm doing is an extended tub deck into the shower area. I've wrapped a continuous CPE membrane up from the shower pan and over the deck. My slopes and thicknesses are all OK in the pan and curb, however I must have spaced because I only allowed myself a 1/4" mud thickness at the lowest point on the bench. I'm concerned this isn't going to be enough even with lath reinforcement.