Setting shower base and tub base

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by myrightnut, Dec 11, 2006.

  1. myrightnut

    myrightnut Civil Engineer

    Oct 23, 2006
    Civil Engineer
    Ontario, Canada
    Hi All,

    I need some advise regarding the above....

    I purchased a Shower kit which included the glass for doors and the base. The unit goes in a corner of the bathroom and you tile the corner walls.

    Here's my problem.... I spent a long time leveling the concrete floor under the shower (the new bathroom is going in the basement) and have it damn near level in all directions. I set the shower base down and its not level... After alot of shimming and swearing I took off the base and found that the base is no where true... the block supports are not level and the tilling lip is not even vertical... this pushes the base away from the wall and the blocks put it out of level (almost half to a full bubble!!!).


    I'm going to shim the base to make everything level and drain properly... I would like to make the install permanent and have thought about using the expanding foam insulation underneath to keep it in place and allowing it to fill in the voids to make it solid. has anyone done this before?

    One plumber said that he would take a belt sander and sand down the uneven areas of the acrylic base to make it sit right... another said to put down a bed of thin set... which I thought about... but since it dosn't site right Im afraid I will just make the situation worse this way.

    I got the Idea (of using the expanding foam) from listening to my supplier of my tub... who said that when he installs the tub, the base of the tub has pads it sits on and he fills in the void between the pads with the expandable foam... he says it helps insulate the tub and makes it quite solid.

    Your thoughts and ideas are very appreaciated!
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    Most places use mortar. You can use what is called deck mud, which is a mix of mostly sand with some concrete in it. There are other products that will work.
  3. Sponsor

    Sponsor Paid Advertisement

  4. Gary Swart

    Gary Swart In the Trades

    Sep 1, 2004
    Yakima WA
    Set it in mortar. This will not only allow you to level the base, it will fill in the void under the base and solidify it so it won't flex.
  5. geniescience

    geniescience Homeowner

    Nov 27, 2005
    humid summers hot, humid winters cold
    foam or mortar

    no to sanding\
    no to thinset/

    ok to use minimal expanding foam if you are comfortable with it
    ok to use mortar.

Similar Threads: Setting shower
Forum Title Date
Plumbing Forum, Professional & DIY Advice Setting drain fit tile shower Nov 30, 2016
Plumbing Forum, Professional & DIY Advice Setting Basement Shower Pan Nov 5, 2016
Plumbing Forum, Professional & DIY Advice setting new pvc drain height for pre-formed shower pan Sep 2, 2009
Plumbing Forum, Professional & DIY Advice New Eljer air bath tub - quick question about setting correctly Apr 5, 2017
Plumbing Forum, Professional & DIY Advice Setting toilet on vinyl floor Jul 26, 2016

Share This Page