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Thread: Drop-in surround

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  1. #1
    DIY Junior Member clapfc's Avatar
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    Default Drop-in surround

    OK, quick and easy question ( I hope).

    Building surround for drop -in whirlpool, walls up. Soon to attach the 3/4 plywood & 1/2 cement board on top. Question to those more experienced: Should I use the 1/2 cement board or use 1/2 hardie backer? Is there really much of a difference?
    CLAPFC

  2. #2
    ACO Shower Drain Sales johnfrwhipple's Avatar
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    Post(s) removed by John Whipple
    Last edited by johnfrwhipple; 03-18-2014 at 07:02 AM.


    jfrwhipple@gmail.com - www-no-curb.com - 604 506 6792

    Always get construction advice double checked by your local city hall. Flood Test Every Shower - Every Time.

  3. #3
    DIY Junior Member clapfc's Avatar
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    John,
    Thank you for responding. Interesting question for tub deck waterproofing. I have two bathroom guide books and neither one talks about waterproofing the tub deck. I was just going to use cement board and then tile. I had no waterproofing plan. If you have a suggestion for waterproofing I would love to hear it. In addition I just built the shower bench and was going to cement board on that. Should I water proof that also?
    I have three things going on which I will post pictures of.

    1.Whirlpool as one walks into the bathroom. I finished the tub frame but did not cut it out yet as I was using the tub frame top (plywood) to put my ladder on has I construct the top of the wall for the walk in shower right behind it. Should I cut out & then waterproof? what should I use?


    2. On top of that shower wall I built I left a triangle opening (it is a catheral ceiling bathroom) where I am putting 3/8 inch tempered glass to maximize the sky light over the shower.

    3. Shower bench I just finished yesterday. I still have to re-wire most of the electrical lines.

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    CLAPFC

  4. #4
    DIY Senior Member kreemoweet's Avatar
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    Any tile installation that will have significant water exposure needs to be waterproofed. If the guidebooks you've been using
    somehow omitted that fact, you'd best chuck them in the dumpster right now. There would be some latitude on the
    whirlpool, but certainly not for the shower bench. As for the cement board vs Hardiebacker, that's mostly a personal
    preference, and a lot depends on the installation details, which I note you completely omitted.

  5. #5
    Retired Defense Industry Engineer jadnashua's Avatar
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    Default

    Cement board isn't destroyed by water, but it is by no means waterproof. A properly built shower can be used even before the tile is up and not leak...the tile is the wear/finish layer, NOT the waterproofing layer. Having a wooden shower bench inside of the shower is just asking for problems. You have to waterproof OVER it so it is functionally OUTSIDE the shower (like the studs), if you want it to last (and remember, CBU is NOT waterproof). There are various ways to do this: sheet membranes or paint/roll/trowel on waterproofing systems. It must be done properly and not be haphazard. If you try to wing it, it will probably fail. ALso, keep in mind that the top surface of the bench that is waterproofed, must slope towards the drain and can't be level or it will pool water and fail. At the least, water will keep the grout dark and promote mold growth. The slope is critical as is the waterproofing. There are a couple of industry standards that describe ways to do this correctly; one of them is the TCNA handbook (Tile Council of North America). They are not all that DIY'er friendly, but they do describe various approved, tested methods on how to do things in tile that work. The handbook does not mention product brands, only methods, so you then have to choose a method and then the product to use.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  6. #6
    ACO Shower Drain Sales johnfrwhipple's Avatar
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    Post(s) removed by John Whipple
    Last edited by johnfrwhipple; 03-18-2014 at 07:02 AM.


    jfrwhipple@gmail.com - www-no-curb.com - 604 506 6792

    Always get construction advice double checked by your local city hall. Flood Test Every Shower - Every Time.

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