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  1. #1
    Join Date
    Jun 2012
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    81

    Default finish floor is 1 1/2" above slab for bathroom

    so my slab was poured all the same height for living room and bathroom. the living room floor gets 3/4" and 3/4" (1 1/2") on top of the slab to finish. I am putting tile in the bathroom and heated matt under the tile. what should I do to make up the 1 1/2"? the tile and thinset and mat might make 1/2 to 5/8- should I put a thick grout base in then the matt and tile or do I put 1/2 tile board down then go.....

  2. #2
    Join Date
    Dec 2010
    Location
    Houston Texas
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    2,360

    Default Re: finish floor is 1 1/2" above slab for bathroom

    None of the above.

    There are several ways to achieve what you want to do. The first step is to start a thread on the John Bridge Tile Forum. There you can get advice specific to your geographic area, which we don't know, which is why I don't know if you need a thermal break over the slab or not.

    Tell the guys there we sent you.

  3. #3
    Join Date
    Jun 2012
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    81

    Default Re: finish floor is 1 1/2" above slab for bathroom

    thanks for the lead!

  4. #4
    Join Date
    Jul 2010
    Location
    SoCal
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    5,081

    Default Re: finish floor is 1 1/2" above slab for bathroom

    What are you putting down in the living room that's 1-1/2" tall?

  5. #5
    Join Date
    Jun 2012
    Posts
    81

    Default Re: finish floor is 1 1/2" above slab for bathroom

    no nothing exotic- select red oak 3/4" thick on top of 3/4" plywood on top of the slab for a total of 1 1/2"

  6. #6
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    5,081

    Default Re: finish floor is 1 1/2" above slab for bathroom

    I would look into a way to raise the bathroom floor (thin set or light weight concrete). However a raised bathroom floor is going to cover the bottom of the tub, creating a future problem. There is going to be a problem with the toilet base and drain as well.

    Or you can install a reducer where the hardwood meets the tile.

  7. #7
    Join Date
    Jun 2012
    Posts
    81

    Default Re: finish floor is 1 1/2" above slab for bathroom

    let me be more clear- I planned for the 1 1/2" diference. I have a plan for the wood side, and I set all fixtures at the 1 1/2" raised height for finish floor on the bath side so there isn't a worry of future issues. my question merely is what was the best way to raise the bath side for the tile..... mud? durorock? concrete?.........

    the floor will get heat matts so I will check with that manufacturer as well.......

    the other forum said deck mud ( dry pack) was the best.......

  8. #8
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    2,360

    Default Re: finish floor is 1 1/2" above slab for bathroom

    Drypack is best, classic, and easiest to include with the floor heating.

  9. #9
    Join Date
    Jun 2012
    Posts
    81

    Default Re: finish floor is 1 1/2" above slab for bathroom

    awesome- thanks!
    what steps would you use?
    does it still need a thermal break?

    I need her to pick out tile to verify thickness but I plan to work backwards from tile +thinset thickness and heat thickness to figure out the thickness of the dry pack......

    I was thinking drypack then heat mat then thin set and tile?

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