Waterproofing a shower

Discussion in 'Shower & bathtub Forum & Blog' started by NYCremodel, Oct 18, 2012.

  1. NYCremodel

    NYCremodel New Member

    Messages:
    15
    Would like to get a few opinions. My contractor is building the shower with the following layers..

    Floor:

    - plywood
    - no pre-slope
    - 40 mil PVC liner
    - traditional drain
    - sloped mud bed
    - laticrete
    - thinset & tile

    Curb:

    - wood
    - same 40mil PVC from floor
    - concrete board
    - laticrete
    - thinset & tile

    Walls:

    - studs
    - concrete board
    - laticrete (I insisted in this. He claims it is not needed on shower walls and he's never had a shower fail)
    - thinset & tile

    Would like several opinions on what is good and bad with the above since it is weird mix of traditional and topical waterproofing. Specifically:

    1. How bad to have no pre-slope considering pan with laticrete also?
    2. Is is ok to have both PVC liner and laticrete?
    3. Ok to build curb with laticrete over concrete board?
    4. What are concrete board seams (curb and wall) sealed with as I may have to tell them?
    5. Is the laticrete necessary on walls like I insisted or would a wall with only concrete board and thinset&tile been ok like my contractor said?

    Thanks!
    Last edited by a moderator: Oct 18, 2012
  2. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

    Messages:
    4,177
    Location:
    North Vancouver, BC
    post(s) deleted by John Whipple
    Last edited: Mar 17, 2014
  3. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,023
    Location:
    New England
    The liner flat on the floor should be a major red flag...plumbing code requires the waterproof layer to be sloped to the drain. WHEN, not if, moisture makes it beneath the setting bed, it must have a path to the drain, and if it is flat, it will NOT flow to the drain and will slightly accumulate. The chemistry of mortar is that after a couple of years, the pH changes and it then starts to smell like a swamp if it is used a lot and not given a chance to thoroughly dry out.

    Insist it is built per one of the approved methods which ALL require the liner to be on a sloped bed.
  4. Manny1981

    Manny1981 New Member

    Messages:
    3
    Location:
    Brooklyn, NY
    New waterproofing membrane coming soon

    New waterproofing membrane information will be posted once final certification is completed. Will keep you updated.
    Last edited: Jun 3, 2013
  5. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

    Messages:
    4,177
    Location:
    North Vancouver, BC
    BondTAC has no IAPMO Certification - No ANSI 118.10 rating WHOOPS try again

    post(s) deleted by John Whipple
    Last edited: Mar 17, 2014
  6. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

    Messages:
    4,177
    Location:
    North Vancouver, BC
    BondTac Promotion by Glue Tek - Owner and founder of GlueTek is Manny Halpern

    post(s) deleted by John Whipple
    Last edited: Mar 17, 2014
  7. Manny1981

    Manny1981 New Member

    Messages:
    3
    Location:
    Brooklyn, NY
    Hey there John,

    I understand your skepticism. Bit harsh, but understandable. My own company is Lenfex Kitchen & Bath (www.lenfex.com), but I'm not posting here about that obviously. And you are correct, I do sell the BondTAC products, of course. I am involved, partly, with BondTAC - you see, it's a family owned company. I've helped a bunch of friends with their shower projects, and I've used it in my own shower. I also had my contractor use it to bond "peel & stick" tile to my kitchen floor, and to waterproof and bond Owens Corning XPS insulation to my basement walls. It really IS "that good". As I said, take a look at the YouTube videos. You mentioned the flood test - aside from the showers, which were of course tested, take a look at the aquarium video. I think that's a rather extensive test of BondTAC's waterproofing capabilities. And if you don't believe the coverage area, get a quart - honestly - and test it out yourself. Try it on sheetrock and on cement board. One coat on the first, two on the second. I would really like your first hand opinion of the products. I know it's miles above the other waterproofing membranes - and that sounds impossible, but try it. Take a cardboard box, coat the inside, fill it up and let it sit for as long as you like. BondTAC isn't a major corporation (yet), but it's getting there. As for tests and certifications, see below.

    The BondTAC products meet the following Canadian testing and certifications currently, and will have the ANSI 118.10 and 118.12 certifications shortly:

    ASTM E 96-05 - Standard Test Methods For Water Vapour Transmission Of Materials
    ASTM C 1306-08 - Standard Test Method For Hydrostatic Pressure Resistance Of A Liquid-Applied Waterproofing Membrane
    CAN/ULC-S102 - Standard Method Of Test For Surface Burning Characteristics Of Building Materials And Assemblies (Yes, BondTAC is also HIGHLY fire resistant when cured)
    40 CFR 51.100 - U.S. Environmental Protection Agency Definition Of VOC Exemption
    SOR-2009/264 - VOC Concentration Limits For Architectural Coatings
  8. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

    Messages:
    4,177
    Location:
    North Vancouver, BC
    ANSI 118.10 certification for showers - Waterproofing Systems require this

    post(s) deleted by John Whipple
    Last edited: Mar 17, 2014
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