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Thread: Building a shower pan

  1. #1

    Default Building a shower pan

    I plan on installing a mortar bed shower pan with a liner in it. The one thing I'm curious about is the finish mortar bed. After pre-sloping a mortar bed beneath the liner, do I additionally need to slope the finish bed or can I put in a 1 1/4 inch layer following the slope of the previous bed? It seems to me as long as the finish bed has a 1/4" per foot slope that should do.

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    New England


    The setting bed should be the same thickness all over; in other words, parallel to the sloped liner. If you haven't checked it out, check out www.johnbridge.com for tiling help. The areas most people mess up is locking the bottom layer of cbu and vapor barriers over the liner plus dam corners and properly making the curb. All of those items are covered over at that site, and lots of tiling pros for help.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona

    Default liner

    The shower floor has to pitch to the drain, regardless of whether it has the same slope as the subfloor or not. I am not sure if I understand the reason for the question, however, because you would not install the tile on a level plane.


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