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Old 08-26-2008, 09:05 PM   #1
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Undermount Bath Sink Dropped


Help!! My undermount in the bath separated and dropped a half inch or so. It's a porcelin or china sink (bonded with something) to a marble vanity top. There are no clips or slots for clips on the underside of the vanity top.

What's the best way to remount this thing securely???

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Old 08-26-2008, 10:19 PM   #2
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Undermount Bath Sink Dropped


It was glued to the underside of the counter with no hardware to retain it? Did you have it installed by a "professional" countertop installer or a plumber? If so, you need to give them a call.

Normally with stone/granite/marble tops, undermount sinks are retained by a few clips that are inserted into milled pockets in the underside of the top, as you mentioned. They're siliconed as a good measure, but probably more for the purpose of sealing leaks.

I doubt that silicone adhesive would sufficiently adhere the sink to the underside of the counter. I can't think of anything else that might be appropriate for this application. Perhaps a countertop company in your area could recommend a better product.

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Old 08-27-2008, 03:20 AM   #3
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Undermount Bath Sink Dropped


Right, there no clips or milled pockets for them. And the actual installer person is unknown. So what can I do to hold the sink up at this point??
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Old 08-27-2008, 06:28 AM   #4
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Undermount Bath Sink Dropped


You may want to take to top and sink to a shop that does this and have it reattached. Never did any myself but you may be able to get some epoxy that will hold it. Either way you have to turn the top upside down to repair it.
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Old 08-27-2008, 10:35 AM   #5
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Undermount Bath Sink Dropped


Barring removal of the top, you might be able to frame some wood supports under the sink's sides to bear its weight...Essentially wedgeing it in place. Combined with some silicone, it would probably support it just fine.

It would certainly not be an ideal installation or a selling feature, but would be an inexpensive and easy way to get your sink back in business until you can fix it correctly.
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