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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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    • CommentAuthorowlman
    • CommentTimeMay 2nd 2017
     
    I've seen various methods of fitting under-mount sinks and the support needed either with epoxies and/or various clips and structural supports to the cabinet.
    My question however relates to the practicalities and aesthetics of the view from the top.
    Assuming a stainless steel sink under a granite or other solid surface:-

    1. To set the granite back from the sink edge by e.g.5mm.

    2. To set the granite dead flush with the sink edge.

    3. To overhang the granite by a few millimetres.

    IMO each method has pluses and minuses especially with the obvious silicone sealant application and it's eventual degradation. Any thoughts or experiences?
    • CommentAuthorPeterStarck
    • CommentTimeMay 2nd 2017 edited
     
    I've recently installed two undermount sinks under a granite worktop. I took advice from a friend who was a kitchen fitter and from the granite installer who both said to overhang the granite by 5mm. It looks good and I'm happy. I fitted the sinks with G clips and sealed with silicone sealant.
      sinks.jpg
    • CommentAuthortony
    • CommentTimeMay 2nd 2017
     
    Undermounted sinks are inherently unhygienic as the overhang or join harbours bacteria and is very difficult to keep clean.
    • CommentAuthorowlman
    • CommentTimeMay 2nd 2017 edited
     
    @Peter; that method ( overhang), is usually the one recommended by granite manufacturers. I have a suspicion that it's also easier for them when positioning the sink from below as 5mm at one end and 3- 4mm at the other won't be too noticeable. It maybe also gives more surface area to bond to, depending on sink rim width.

    Whereas "under-hang" by 5mm and it has to be mm perfect as its easily noticeable. Yet "under-hang" is the preferred method of the sink manufacturers as they say it shows the sink to the best advantage.

    @tony; I too am a little bit wary. Top-mount/inset/lay on, is good as the sheer weight of the sink makes a good seal. Inset/ flushmount/ integrated looks the best if you can achieve it but it restricts the sink choice
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