Cultured marble shower base over plywood: Do I need to nest in a bed of mortar?

Discussion in 'Shower & Bathtub Forum & Blog' started by KurtWM, Aug 6, 2005.

  1. KurtWM

    KurtWM New Member

    Aug 6, 2005
    I am installing a 48x34 inch cultured marble shower base over a clean, level plywood subfloor. Is it necessary to nest the base (a pretty heavy one) in a bed of mortar?

    Also, are there any tips/methods/suggestions for getting such a heavy base into place safely in a small bathroom using only two guys?
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    If the floor isn't perfectly flat (almost none are) or if the bottom of the base isn't fully seated on the floor, then bedding it in dryset mortar, plaster of paris means that it might flex or rock. If the manufacturer recommends it, do it. Practically all will work better if you do. My unprofessional opinion.
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