Adhesive that has let go
Glue along the rim can fail when it was applied to a dusty or wet surface, or when moisture has been working at the joint for a long time.
Undermount Sink Repair in Temecula
Temecula Custom Countertops is a trusted specialist in undermount sink repair in Temecula, CA and across Riverside County, specializing in stainless, fireclay and composite sink reattachment to the countertop. We offer sink re-mounting and support work.
- Free in-home measure
- You approve the seams on the slab
- Price in writing first
Get a free measure or a bid
Or call (951) 466-2371. Calls only, we do not receive text messages.
About our undermount sink repair & reattachment
Our team provides a full check of the cabinet and plumbing beneath the sink, delivering a sink that sits tight to the stone for both residential and commercial countertop projects. Because we template the cutout and fabricate the stone in our own shop, we know how much weight the stone around the opening can carry.
From a hairline gap at the rim to a sink hanging off one side, our team handles every detail. Serving Temecula, Fallbrook and French Valley, we start with a free look under the counter.
How we work
Measured, Cut and Set by One Crew
Homeowners get a free measure. Wineries, restaurants, offices and builders get a bid from their drawings.
One crewThe people who measure your cabinets are the people who set the tops
Seams on the slabSeam lines marked on the slab you picked, and approved by you before cutting
Wet-cut in the shopStone is cut and polished in the shop, never sawn inside your house
CA License #585047Licensed, bonded and insured
What Holds an Undermount Sink Up
An undermount sink is fixed to the underside of the stone, with no rim on top. That is what gives the clean look and lets you wipe crumbs straight into the bowl. It also means the sink hangs from the countertop, not the other way round.
Most are held by adhesive along the rim, supported by clips, brackets or a support rail. The stone around the opening carries the load, and a full sink of water, a stack of dishes and a disposal add up to a lot of weight.
When that system works, nobody thinks about it. When it fails, the first signs are small: a gap at the rim, a sink that looks lower on one side, or water running under the lip rather than into the drain.
Kitchens in Temecula get hard use. A big family sink, a wine glass wash after a party and a disposal that runs every day all load the same few inches of stone. A mount that was only just adequate in year one shows its limits as the years pass.
Why Undermount Sinks Fail
Failures tend to come from a handful of causes.
Clips that were never enough
Clips alone are rarely enough for a heavy cast sink. If the installer used too few, or screwed into weak material, the sink slowly pulls away.
Cabinet movement
If the cabinet below has sagged, the rail that held the sink goes with it.
Weight over time
A deep farmhouse or double bowl full of water is heavy, and a garbage disposal hanging below adds load. Support that was marginal at the start gives out eventually. Moisture is the quiet partner in most of these failures. Water that seeps under the rim softens the adhesive and the cabinet floor together, which is why a sink that has been loose for some time often comes with a damaged cabinet.
Re-Mounting With Proper Support
A sink that has dropped once will drop again if it is only glued back. A safe repair adds mechanical support so the weight no longer rests on adhesive.
We lift the sink back to its position against the stone, clean the mating surfaces, and fix it with fresh adhesive. The weight is then carried by brackets or a support frame under the sink, tied into the cabinet or the stone rather than into a thin panel.
The plumbing is disconnected before we start and reconnected afterwards, and the disposal and the supply lines are checked for strain. We then run water through the bowl and look along the rim from above and below for leaks before we call it finished.
The aim is a sink that stays in position with the bowl full, not one that only looks right when empty.
Where we can, we also re-check that the drain is aligned and the rim is even, so the bowl drains fully rather than holding a pool in one corner.
Checking for Water Damage
A sink that has been detached for a while has usually been leaking into the cabinet. Damage is quiet at first and expensive later, so we open the cabinet and look.
- Swollen or crumbling cabinet floors, which show as soft or bubbled particleboard.
- Dark marks, mould or a musty smell around the plumbing.
- Rust on the support brackets, the disposal flange or the supply valves.
- Staining on the underside of the stone where the sink meets it.
If the cabinet floor or the supporting rail is soft, it has to be dealt with before the sink goes back, because new support screwed into rotten board will fail like the old one. We tell you what we find and what it means for the repair.
None of this is meant to alarm you. A caught early problem is usually a short job, and the checking is just so that the repair we do is not undone by a hidden one.
When the Cutout Is the Problem
Sometimes the sink was not the weak part. A cutout made too tight, with sharp inside corners, can start a crack in the stone that runs out from the corner. A narrow strip of stone left between the sink and the edge of the top can crack under load.
If we find a crack at the opening, repairing the stone has to come first, and in some cases the right answer is a new top section. When we remake it, we template again on the installed cabinets, and we fabricate the cutout in our own shop with rounded corners and enough stone around the bowl to carry it.
If that is the situation, we explain it plainly and quote both options.
Swapping the Sink at the Same Time
A repair is a good moment to change the sink, because the old one is already disconnected. If you want a deeper bowl, a different material or a new faucet position, we can look at whether the existing opening suits the new sink.
A sink of the same make and size usually fits the same opening. A different size may need the cutout adjusted, and that depends on how much stone is left around it. We check the template of the new sink against the opening before cutting anything.
We can also look at whether a faucet hole or soap dispenser hole needs to move. If you are changing the whole kitchen, our replacement page covers the larger job.
If the faucet is being replaced as well, the hole in the stone has to suit it, which is another reason to decide before the sink goes back.
What Sink Repair Costs
As a guide from industry ranges, undermount sink repair and reattachment is typically estimated at roughly $200 to $600. The price depends on the sink weight and material, the support needed, whether the plumbing and disposal have to be disconnected and reconnected, how much cabinet repair is involved, and whether the stone at the opening is cracked.
Replacing the sink itself is quoted separately, since the sink is priced on its own. A remade top section is priced from its size and material.
None of these amounts is fixed: they are estimates, subject to change, and the final price is set in your written quote. Call for a free estimate before water does more damage.
Edges and Finishes
The process
Four Steps From Call to Countertop
No stone is cut until you have seen the slab and signed off on where the seams go.
Call or send the form
Tell us the room and the material you have in mind. Businesses and builders send drawings for a bid.
Pick the slab
You choose the slab at the supplier, and we mark where each seam and cut will fall for your approval.
Measure and fabricate
We measure on your installed cabinets, then cut, edge and polish the tops in the shop.
Set the tops
The same crew sets the tops, mounts the sink, closes the seams and cleans up before leaving.
Also from our shop
Related Countertop Services
Service area
Towns We Install In
Questions
Undermount Sink Repair & Reattachment: Common Questions
Why is my undermount sink sagging?
The adhesive has let go, the clips or brackets were not enough for the weight, or the cabinet support underneath has moved.
Can a dropped sink be glued back on?
Glue alone is not a lasting fix. We add mechanical support so the weight no longer rests on adhesive.
Do I need to stop using the sink?
Use it as little as you can, because a heavy sink full of water puts more load on a failed mount, and the gap lets water into the cabinet.
Will you check the cabinet underneath?
Yes. We look for swelling, mould, rust and soft board before the sink goes back.
Do you reconnect the plumbing and disposal?
Yes. We disconnect and reconnect the supply lines, drain and disposal, then run water to test for leaks.
What if the stone is cracked around the sink?
The crack is dealt with first. If it runs through the strip beside the opening, we usually recommend replacing that section of the top.
Can I change to a different sink during the repair?
Often yes. We check the new sink against the opening and adjust the cutout if there is enough stone around it.
Does this apply to granite, quartz and marble tops?
Yes. The mount and support method is the same, and the stone type affects only how we handle the cutout edge.
How do I get an estimate?
Call us or describe the gap on the contact form. We visit for a free estimate and a look under the sink.
Is an undermount sink repair covered by a written warranty?
We provide a written warranty on our work. Ask us for it when you request the quote.
Free measure
Ask us about undermount sink repair & reattachment
A free measure for homeowners, and a written bid from drawings for businesses and builders.
Licensed, bonded & insured · License #585047. Calls only, we do not receive text messages.