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Waterproof/fill void left after removing vanity

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  1. #1
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    Default Waterproof/fill void left after removing vanity

    Previous home owners tiled around a vanity, then the vanity needed to come out. Now this void approximately 30mm deep is left, and we want to fill it and retile so we can use a wider variety of vanities. Leaking shower screen will be fixed so it will not damage the new vanity.

    Can I level with cement first and tile, or do I need to waterproof the floor before?
    There also seems to be some rubber and mesh alongside the existing tiles, what is the best approach in this case?

    Thanks all for your feedback
    img_20221029_111108_226.jpgimg_20221029_111049_173.jpgimg_20221029_111033_024.jpg
    Last edited by davidtal2022; 29th Oct 2022 at 11:14 AM. Reason: Adding pictures

  2. #2
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    Hi David, photos will greatly assist!!!

  3. #3
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    Thanks Bart, I have added a few pictures now

  4. #4
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    Quote Originally Posted by Bart1080 View Post
    Hi David, photos will greatly assist!!!
    Thanks Bart, I have added a few photos

  5. #5
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    A concrete or screed mix should be fine.


    The rubber stuff looks to be old waterproofing??

    In the 2nd & 3rd photo, is the blackness the rubber or moisture from the shower?



    RE: waterproofing the new floor
    1. If you've got an enclosed shower built to AS3740 standards, then the entire floor doesn't need to be waterproofed as per AS3740.
    A consideration is how the shower/bathroom was originally built which is likely to be unknown....but the age may provide clues. ie: was it pre or post AS3740 Waterproofing of Domestic Areas

    2. To correctly waterproof a floor to current standards, unless you know what the previous waterproofing product was and the new product is compatible, then there is no way to fully meet the AS3740 min requirements.
    So to do it correctly, any decent licensed Waterproofer will tell you that to be covered by a warranty, they would need to do the whole bathroom if your bathroom design required that under AS3740

    3. If your current shower isnt leaking and is enclosed, then there is no need to waterproof the floor your about to pour....with some assumptions on point 1.

  6. #6
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    Quote Originally Posted by Bart1080 View Post
    A concrete or screed mix should be fine.


    The rubber stuff looks to be old waterproofing??

    In the 2nd & 3rd photo, is the blackness the rubber or moisture from the shower?



    RE: waterproofing the new floor
    1. If you've got an enclosed shower built to AS3740 standards, then the entire floor doesn't need to be waterproofed as per AS3740.
    A consideration is how the shower/bathroom was originally built which is likely to be unknown....but the age may provide clues. ie: was it pre or post AS3740 Waterproofing of Domestic Areas

    2. To correctly waterproof a floor to current standards, unless you know what the previous waterproofing product was and the new product is compatible, then there is no way to fully meet the AS3740 min requirements.
    So to do it correctly, any decent licensed Waterproofer will tell you that to be covered by a warranty, they would need to do the whole bathroom if your bathroom design required that under AS3740

    3. If your current shower isnt leaking and is enclosed, then there is no need to waterproof the floor your about to pour....with some assumptions on point 1.

    Many thanks for the detailed explanation Bart !
    Yes, it is rubber from the old waterproofing. The silicone in the shower needs replacement so this is where the water were coming from into the vanity. No signs of leaks other than that.

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