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Thread: Undermounting a non undermount tub

  1. #1
    DIY Junior Member zimm0who0net's Avatar
    Join Date
    Jun 2009

    Default Undermounting a non undermount tub

    So, I'm wondering if I can undermount a drop in bathtub that has not been specifically stated as "undermount" capable? It would seem that for cast iron tubs, the sidewalls would be more than strong enough to just sit there under the deck and then I could caulk the deck to the top of the tub.
    In the acrylic/fiberglass tub variety, it seems like I could install it as a drop in in a typical deck configuration (i.e. in a typical deck frame) and then build an actual 2nd top (show) deck over the top of the tub (and sub-deck).
    Any thoughts?
    Last edited by zimm0who0net; 06-07-2009 at 09:42 AM.

  2. #2
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona

    Default tub

    NONE of the tubs should be supported by their rims, so you install the tub with whatever support it needs under its bottom and then construct the frame around it, either above or below the rim.


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