A depth of 42 is a significant improvement and 48 is even better.
Slope of a shower floor lip.
To determine the proper slope measure from the drain to each wall and figure a quarter inch of slope per foot of length.
Using thinset to create a 2nd pre slope on the shower pan in order to give it enough pitch so the water will flow.
This will literally lay the groundwork for a beautiful new shower tile floor.
Continue this process around the entire shower pan.
The curb or lip around the bottom of the shower should to be slanted inward at a 5 degree approx.
The larger the shower the easier it is to gradually slope the shower floor to the drain and contain water.
The stuff you stick the tile to.
It will take some time and patience the first time you do it but the reward is that you ll have a perfectly sloped shower pan.
Overall shower unit size length and depth are critical for water control.
A level curb would cause the water to stand while a curb angled away from the drain would cause water to leak onto the bathroom floor.
How to fix a shower pan pre slope mistake.
Once you ve screeded the slope use a wood float to pack the mud down.
36 should be considered the minimum depth for any curbless shower.
If the wall is 3 feet from the drain the cement should rise by 3 4 inches as it goes from the drain to the wall starting at the half inch depth around the drain for a total height of 1 1 4 inches at the wall.