Originally Posted by leroycnbucks
Originally Posted by !shiloh!
More than likely the membrane was laid flat on the subfloor so the mud bed never completely drains . Plus it will sweat. A pre mud bed between the subfloor and the membrane makes all the difference in the world..plus a little silicone above and below the drain.



Yep. The American National Standards Institute for the installation of ceramic tile clearly shows the proper shower membrane install. Heck it even has pictures. But I was constantly amazed by the lack of this knowledge in the tile industry. And those to cheap to do it right because it would take two steps ( trips ) instead of one. There's a reason that there are weep holes on the drain flange that fastens to the rubber pan.

Yeah those weep holes are important. Bet when the shower in the op is torn out the weep holes will be clogged too. I put a small donut of pea gravel around my drains to prevent clogging.


ggg