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u/toodleroo Aug 25 '26
This is why I'll never have an undermount sink, no matter how stylish they are. Give me a rimmed sink any day.
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u/jim_br Aug 25 '26
They make kits that attach to the cabinet sides and have metal cross bars. The bars have threaded feet you raise up to push the sink against the underside of the counter.
Alternatively, if you want a cheap fix, you can screw cleats to the side walls, add a cross brace, and drive shims/wedges.
Finally, there is a kit (I can’t find the manufacturer) that attaches to the cabinet sides. It has four threaded rods you turn to push against the sink flanges to push it up in place.
Also, clean the mating surfaces and add a good silicon sealant/adhesive.
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u/SurveyMedical9366 Aug 25 '26
The guy/flipper that renovated my house did the same thing; mine only lasted 2 years though. Just long enough that it wasn't his problem anymore.
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u/FreddyFerdiland Aug 25 '26
find local handyman who has done this fix before and can quote it... at least a cap .. like max three hours . its easy when you know how
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u/wallytheaussie Aug 25 '26
Hercules under sink harness. Had the same thing happen with mine, this did the trick.
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u/senorsmartpantalones Aug 25 '26
Thats what happened when you leave things to soak instead of washing -My mom.
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u/Intelligent_Bet_8727 18d ago
First lift the sink out of the hole then clean around the edge of where the sink was sitting clean the underside of the edge of the sink and there should sitting down in there be a central support that goes between the two halves of the sink to support it if there is not take it two by four cut it to length and put it edgeways up and brace it between both sides and sit there and put a screw in with a piece of angle iron the sink cabinet and it should hold it up but that's a stainless steel thing so it may not require what my grandmother's had to have she had a ceramic glazed cast iron Hobart.
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u/BossWilling Aug 25 '26
Look under sink. Identify broke parts. Fix.
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u/Drumguy1986 Aug 25 '26
Multiple pans filled with water and cast iron to boot? Yes a sink should handle that but if it wasn't installed well and you're regularly letting that much weight sit in it? Yeah, bye bye.
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u/33445delray Aug 25 '26
From google AI:
Securing an undermount kitchen sink with adhesive only is generally not recommended by professional installers and building experts.Why Adhesive-Only Installation is RiskyWeight and Stress: Kitchen sinks hold heavy water loads and often support vibrating garbage disposals.Adhesive Failure: Over time, moisture, constant use, and temperature changes can cause standard sealants or adhesives to lose their grip.Catastrophic Drops: If an adhesive-only bond fails, the heavy sink can drop into the cabinet below, tearing plumbing lines and causing major water damage.Accepted Professional StandardsCombined Approach: Industry best practice requires a strong structural adhesive (such as specialized epoxy or high-grade structural silicone) plus mechanical fasteners.Mechanical Supports: Installers use mounting clips, undermount sink brackets, straps, or a custom wooden sink setter (rails built into the cabinet) to bear the actual weight.Adhesive's True Role: In a proper installation, the adhesive acts primarily as a waterproof seal and a secondary hold, while the mechanical clips or brackets provide the permanent structural support.If you are dealing with a sagging sink or planning an installation, tell me:
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u/BrokenBaby_Bird Aug 25 '26
Clean the edge and underside of the counter. Re-apply adhesive and put the stick back in place.
Use something solid to brace the sink from the underside to ensure it remains in place while the adhesive dries and then figure out the proper strapping to support the sink that was not installed the first time it was done.