keri drain, old deck mud, recessed shower
I have searched but have not been able to find my situation... I hope I have not missed the obvious thanks in advance
36" x 60" recessed shower (5" at drain)
cast iron drain has been dug down and cut off 3.5" below old mud bed ( very thick and solid) to attach kerdi drain with fernco coupling
It seems that I have found minimum mud depths from .75" to 1.5 " at the drain on various posts, mud calculator etc.
I don't want to lose the recess and add a curb, so considering I have a big square hole around the drain, slightly larger than the kerdi flange, what is the minimum thickness of the mud bed ? also would you recommend using thin set between the old and new bed.
Thanks for all the info and experts on this forum. This project is starting to wear thin but want to do it right