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  1. #1
    Join Date
    Jul 2013
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    5

    Default bathtub free floating on front

    Plumber installed an American Standard Vinyl 60x30 bathtub. He put in in a bed of concrete and used ledger boards around the three sides. On the front side of the tub (60 in side) it doesn't touch the sub floor or the existing tile. Basically free floating on that side. Obviously the floor is not level but the tub is level. He suggested that we just spray the expanding foam. We have tried to put wood under it but is is difficult due to the small gap and he already attached the drain!. Afraid that if someone sits in the edge of the tub it will break or drop down into the one inch gap between the floor and the edge of the tub. Any suggestions. My hubby tried to tell him this was wrong and he insisted it was fine. Tried to up load pics but it doesn't seem to work. PLEASE HELP.

  2. #2
    Join Date
    Feb 2010
    Location
    South*East
    Posts
    1,168

    Default Re: bathtub free floating on front

    Don't use expanding foam. It will lift the tub. Try getting cement or thin set under the unsupported section.
    John

  3. #3
    Join Date
    Jul 2013
    Posts
    5

    Default Re: bathtub free floating on front

    That is exactly what we told the plumber and plus that it would void the warranty on the tub! We are going to try to get three pieces of lauan under the tub which will bring it level with the existing tile. That will still give us a little less than 1/4 inch from the floor to the tub base. We do have some type of stuff that you mix for rotted wood. Hubby is going to try to roll like a hot dog pieces of it to fill that 1/4 in gap. It dries rock hard and we are hoping that will do the trick. What do you think about that idea? Beyond frustrated.

  4. #4
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    2,363

    Default Re: bathtub free floating on front

    We use foam inna can all the time for tubs. But you have to use the stuff in the blue can for windows and doors as that will not lift the tub.

    You can't get enough foam under the tub along that edge to lift it anyway. Not enough force will be generated. The foam is also a good idea to act as a damn when you are using self leveling cement to flatten the floor.

    If your floor slopes one inch in 5 feet you have structural issues or one heck of a warped tub.

  5. #5
    Join Date
    Jul 2013
    Posts
    5

    Default Re: bathtub free floating on front

    No structural issues other than it is a house that was built in 1924. The back side of the tub is about 1 inch and the faucet side is about 3/4 inch. So it isn't off very much. The plumber said he had to connect to the old plumbing so he couldn't lower the tub into the gap between the sub floor and the tiled floor. Don't know why cause the old tub sat below the tile with no problem. The tiled floor has two layers of 1/4 inch lauan then 1/4 inch tile. It might be a good idea to use the foam as a barrier to maybe float a leveling compound. Does the wood floor have to be protected underneath if we can get some type of floor leveling stuff in there? He put plastic down before he put the concrete bed in.

  6. #6
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    2,363

    Default Re: bathtub free floating on front

    1/4" luaun is not an acceptable layer under any floor tile.

    To correct the floor tiles, head on over to the John Bridge Tile Forum to get the best advice. Tell them we sent you and that we're still waiting for the donuts.

  7. #7
    Join Date
    Jul 2013
    Posts
    5

    Default Re: bathtub free floating on front

    I'm not sure if it is actually lauan as it was installed before we bought the house. But there is two layer that are 1/4 inch each. The top layer what the tile sits in looks white from what we can see. We don't plan on removing the tile as it is in perfect condition.

  8. #8
    Join Date
    Jan 2008
    Posts
    1,101

    Default Re: bathtub free floating on front

    Quote Originally Posted by Lorac View Post
    I'm not sure if it is actually lauan as it was installed before we bought the house. But there is two layer that are 1/4 inch each. The top layer what the tile sits in looks white from what we can see. We don't plan on removing the tile as it is in perfect condition.
    With that thickness of substrate, the tile isn't going to be in good shape for long. I'd fix the tub by fixing the tile you're going to be redoing soon anyway. Only then you will have a bathroom floor and tub that lasts, leaving you time for more/other DIY projects which all homes come with

    Phil

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