Bathtub installation and Mortar

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Rosewood, Oct 24, 2005.

  1. Rosewood

    Rosewood New Member

    Messages:
    2
    Purchased whirlpool tub. Is NOT a drop in. Says I am to mortar the floor that it will sit upon when I install. I understand need for that IF it was just a tub.. However, this tub came "mounted" on a wooden board. I don't see how mortaring under the wooden board will benefit the tub in any way.. .Is this board to be removed upon installation? Any info is greatly appreciated.
    Thx.
  2. sulconst2

    sulconst2 New Member

    Messages:
    205
    Location:
    old bridge nj
    the mortar is to level and support the tub. plywood stays. usually the bands holding the pump get cut. check your directions.
  3. Rosewood

    Rosewood New Member

    Messages:
    2
    Directions just said to put down mortar under tub... Still seems crazy to put down mortar then the board and tub on top... I can see how it will allow you to level the tub, but don't see how it "supports" if a very heavy person were to stand on one foot in middle of tub.. Would seem to me, that if you mortared between tub and board, you would be able to have support under the whole tub, and the chance of someone "cracking" it would be reduced.
    That all being said, the mortar goes between the floor and the board CORRECT? So far as I can tell, there is nothing between the tub and the board it is attached to except that the tub touches the board in some places.
    thx again for any help.
  4. Terry

    Terry Administrator Staff Member

    Messages:
    15,413
    Location:
    Bothell, Washington
    Many tubs come with a board under them.

    If you use mortar, or fixall, or plaster, it would be under the tub with board.
    Not between the tub and attached board.
  5. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,242
    Location:
    Cave Creek, Arizona
    tub

    If the board sets the tub level and you are going to build the platform up to the tub rim, then the mortar is not necessary, and would only raise the tub higher.
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