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  1. #1
    Join Date
    Apr 2007
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    west aust
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    Default sealing villa board

    I am currently renovating our bathroom and are seeking advice on sealing villa board sheeting in the shower area.I intend to apply a waterproof membrane to the floor and partially up the walls.the wall tiles will be floor to ceiling.Should i seal the walls outside of the waterproofed area and if so with what product?I guess any product would have to be compatible with wall tile adhesive.I am feeling some pressure from SWMBO as the novelty of a temporary outside shower is wearing of fast.Any advice appreciated.

    Wattsy

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  3. #2
    Join Date
    Sep 2006
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    Behind that little door under the thicknesser...
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    Default

    The board doesn't need to be sealed if outside the membrane area.

    However, make sure you aren't stingy about the coverage of your water proof membrane - all floor and some distance up the walls is good but your entire shower cubicle area should be sealed floor to ceiling out to 500mm past either side of the shower...
    Ours is not to reason why.....only to point and giggle.

  4. #3
    Join Date
    Apr 2007
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    west aust
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    Default

    The shower area is an enclosed area 1.6m by1.3m with a ceiling mounted rose.would you recommend using the same sealer on the walls as used on the floor?

  5. #4
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    Sep 2006
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    Seal the lot - floor and walls plus another 500mm past the entry. Use the same sealer.
    Ours is not to reason why.....only to point and giggle.

  6. #5
    Join Date
    Jan 2006
    Location
    Melbourne
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    722

    Default

    You can get a davco sealer for the FC sheet that just locks down any dust etc. prior to sticking on the tiles. It is a milky like substance and only take 20 minutes or so to dry. Can be worth it if you have dirtied up the board a bit walking on it or there has been much dust around.

    The membrane should be one type on the floor and walls with bonding tape etc. at any joins. You should take the membrane past the height of the rose or to the ceiling if that's where it's fitted.

  7. #6
    Join Date
    Aug 2003
    Location
    Pambula
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    58
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    Default

    Let's be clear about waterproofing vs. sealing.

    For waterproofing, what you should do is apply your waterproofing membrane to the entire floor and 100mm (I think) up the wall all around the room, and to the height of your splashback behind the bath (if any). The entire shower enclosure should also be waterproofed at least to the height of the rose (in your case, the ceiling). The floor to wall joins must also be waterproofed, using tapes and/or sealants as required and recommended by the membrane supplier. What you are doing is forming a waterproof 'tray' that covers the whole bathroom floor.

    Sealing is only required if you are going to paint. You can put the tiles straight on to the villaboard without any sealer.

  8. #7
    Join Date
    Apr 2007
    Location
    west aust
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    4

    Default

    Thanks all for advice

  9. #8
    Join Date
    Aug 2006
    Location
    Gladesville
    Posts
    7

    Default

    ...also my tiler recommended that I correctly prime the villaboard before applying the waterproofing membrane, otherwise the membrane can peel off the villaboard. If you consider that the tiles are actually adhered to the membrane, then the importance of not having this membrane peel off the villaboard becomes apparent.

    Steven

  10. #9
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    Aug 2003
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    Yes you usually need to apply a primer before the membrane, that will be detailed in the directions.

  11. #10
    Join Date
    Jul 2004
    Location
    ipswich Queensland (Gods backyard)
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    Default

    Quote Originally Posted by stemail23 View Post
    ...also my tiler recommended that I correctly prime the villaboard before applying the waterproofing membrane, otherwise the membrane can peel off the villaboard. If you consider that the tiles are actually adhered to the membrane, then the importance of not having this membrane peel off the villaboard becomes apparent.

    Steven

    another thing to consider is the adhesiveness of the membrane with tile adhesive ,nowadays tile adhesive manufacturers do not guarantee their product for fastness unless you specifically use the waterproofing brand they specify
    kind regards
    tom armstrong
    www.kitcheninabox.com.au
    Flat Packed kitchens to the world

  12. #11
    Join Date
    Aug 2006
    Location
    Gladesville
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    7

    Default

    Quote Originally Posted by silentC View Post
    Yes you usually need to apply a primer before the membrane, that will be detailed in the directions.
    ... the membrane that I used didn't mention priming on the instructions, which is why I brought it up

    The other thing that I don't think anybody has mentioned is to make sure you use some sort of bond breaker at the floor/wall angle. This prevents the waterproof membrane from splitting if there is any movement between floor and wall over time.

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