Undermount sink attachment?

I see a lot of references online saying silicone or appropriate adhesive by itself works fine for many. I suppose it depends on the weight of the sink, how well the surfaces were prepped, and if the correct silicone/adhesive was used.

I’m not sure I would trust many installers to get it right, especially the surface prep part. So for me, I would want clips or some other underneath support method in my own home, just for peace of mind if nothing else.

As far as inspecting, if the sink appears to be holding well, I probably wouldn’t call out missing support. It seems to be one of those drip leg/dirt trap deals where it depends on installer’s preference and what has worked for them.

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I’m not a licensed plumber but in my former life as a contractor I’ve installed several dozen kitchen cabinets, bath cabinets, sinks, faucets, etc. and everything in-between. There are many different types and styles.

In regards to the OP, I’d say it really depends on what I would consider documenting a concern or defect. I’d have to see it in the field. I’m ok with both methods.

I do know it’s near impossible to get mechanical brackets/clips on the underside of a tight space.

Here’s a pic of my personal sink and they way it was mounted. I bought this house new 17 years ago. It’s held up quite nicely :slight_smile:




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It’s pretty common that physicians are offered opinions from patients that reference web MD. The Internet educated patient is always smarter than the accredited and licensed doctor.

My physician assistant says this is something she deals with on a regular basis. I’m sure your clients have always thought you were full of crap with your inspection reports and they knew better.

It was a legitimate question I asked. People without experience always seem to have more knowledge than those who have actually performed the task or received a license in their field.

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Fair enough, it sounded different when you posted it.

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It’s also very common for the internet plumber to get all butthurt when someone calls out his BS, and lashes out as if his shit don’t stink!!

(Then is backed-up by his also butthurt Stalker butt-buddy)!!

Perhaps this will help them ‘get-over-themselves’!

Butthurt

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Just remember one thing cupcake. When you write in your report evaluation by a licensed plumbing contractor, it’s my phone that rings :rofl:

I guess that’s why I’m not on the message board very much. I’m always working. You’re on here 24/7. Sorry.

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Hey everyone,
I want to thank you all for taking the time to post comments on this thread. There may be differing opinions on this but I really appreciate all of the insight and experience you have shared! I am a new inspector and this was my first post to the forum. I really value this information source and the ability to connect with many seasoned inspectors on a variety of topics! I will plan to post more in the future.

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Although our internal “bickering”, you will learn a lot from the forums. Just keep a thick skin and look pass the assholes, not that I personally know of any here, :shushing_face: :wink:

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Always crude when he doesn’t get proper recognition (maybe he did). Being crude is sooo manly…What a dope!

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Have you been listening to my wife or heard her diagnose my problems? :laughing:

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Yes, and it can be entertaining. :grinning:

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Up next…

Caulk or no caulk around a toilet? :man_shrugging:

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I’m with you. My kitchen faucet is hot in the up position. Often the supply lines are labeled hot and cold. You might want to check how they’re connected under the sink. Hot supply is normally on the left.

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I usually inforthe client about the burn hazard to children when the hot is not in the up position. I let them choose what their level of comfort is.

This is exactly how I’ve seen hundreds of sinks installed. (Kitchens and bathrooms)
The clamp holds until the silicone or epoxy was dry.

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similar to what I used to see in the field,

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Agree 100%. The clips that hold the sink in place for the silicone to cure aren’t always accessible or the holes were never drilled in the granite or corian to accept the clip insert.

Do you think this professional used a bonding caulk that can be cleaned up with water or is a solvent like mineral spirits needed?

That picture has to have the dontcha know wannabe plumber from the frozen tundra walking in circles around his moms basement!

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I have an opinion on that one. I have replaced countless wax rings.

Guess which ones have subfloor damage?

As to the thread, I have not installed any undermount sinks, but I have deconstructed quite a few. The first few times I tried to “save” the sink by removing the clips or blocks and fighting with the stupid adhesive. “could you save a piece of countertop and sink, I want to put it on my work bench/slop sink/whatever”.

Now I just bash it apart with a sledge hammer and if I can save anything, here ya go. It’s just not worth the time with that stuff.

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Both will have subfloor damage.

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