Sunken Shower - depth, curb, or ramp
Building a new house - my foundation guy is putting out form boards today and I am trying to get everything right.
The custom built master shower will be "sunken" or in other words like a depressed spot in the slab. I would like to do either a shallow step down or even like a beach entry into the shower.
The question is how deep should we make the rough depression in the slab. We have plenty of room to work with (slab is elevated, floor level is 18 inches above grade - I'm in south Louisiana).
I need to make sure I make it deep enough to maintain at least 2 inch difference between bathroom floor height (the part which is not sloped to the drain) and the finished drain height. But I don't want to make it so deep that the step up would be more than 7 inches.
How much mud can I expect to have between the bare concrete and the top of the finished shower tile floor? How much mud is too much?
Given the width of the shower and maintaining 1/4 inch per foot of slope to the drain, I am thinking I should make the rough dimensions of the depression in the concrete slab anywhere between 8 and 12 inches deep. I guess it's better to go too deep than too shallow, because I can always make up the difference with mud. Am I wrong in assuming that?
I hope I've given you enough info - please let me know if I need to clear anything up. I guess if you could only address one question, it would be how thick of a mud bed can I use to make up differences in height. For example if I've got, say 8 inches of mud at the edge of the shower, sloping to 6 inches of mud by the drain, is that too thick?