Great Stuff under tub?

Discussion in 'Shower & Bathtub Forum & Blog' started by Nate R, Feb 5, 2008.

  1. Nate R

    Nate R New Member

    Joined:
    Jan 11, 2007
    Occupation:
    I perform R&D testiing at small engine manuf.
    Location:
    Milwaukee, WI
    I'm thinking of putting Great Stuff under my fiberglass tub to help get full support between it and the subfloor when I install the tub.

    Should I be using the Great stuff for Windows and doors? (Expands to fill spaces, but doesn't have enough force to bow vinyl windowframes) I guess I'm wondering if I should be worried about the regular stuff expanding too much and pushing the tub up.
     
  2. frenchie

    frenchie Jack of all trades

    Joined:
    Dec 30, 2006
    Occupation:
    Caretaker
    Location:
    Brooklyn, NY and Fire Island, NY
    As well you should be.

    On the other hand, the minimal-expanding cures pretty soft - too soft to count as "support" of any kind.

    If you go with the great stuff, use as little as possible - maybe do some experiments out in the garage, first, to get a feel for it - and fill the tub so that the weight will keep the tub from rising.

    Or, of course, you could do it the normal way, with mortar.
     
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  4. srdenny

    srdenny Plumbing Contractor

    Joined:
    Sep 11, 2004
    Occupation:
    Plumbing Contractor
    Location:
    SF Peninsula
    Try StructoLite. It's a type of perlited gypsum plaster that doesn't shrink, is easier to work with than mortar, it doesn't scratch surfaces and is easy to clean up.
     
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