Arvada, CO · Jefferson County · Everything under the cabinet, sorted
Sink Leak Detection & Repair in Arvada, CO
Open the cabinet under any kitchen sink and you face the busiest square foot of plumbing in the house. Two supplies, two stops, a trap, a disposal, maybe a dishwasher tie-in and a filter. When the cabinet floor swells, one of them is talking.
A Census of the Cabinet
Under-sink leaks divide by neighborhood within that square foot. Supply-side suspects run continuously: braided connector lines, shutoff stops, and filter or ice-maker tees weep around the clock once they start. Drain-side suspects only perform when water flows: trap joints, tailpieces, disposal connections, and the dishwasher hose looping into it. Deck-level suspects, the faucet base and the sink rim seal, leak only during use and travel down the back where nobody looks.
The pattern of when the cabinet gets wet is therefore the first instrument. Damp every morning means supply. Damp after dinner dishes means drain or deck. That single observation, offered on the phone, meaningfully shortens the visit.
Mounting style adds its own suspects. Undermount sinks hang from adhesive and clips that fatigue, letting the rim seal shear invisibly. Farmhouse aprons flex their front joint with every lean. Pedestals hide their connections inside the column where drips run straight to the floor plate. Knowing what holds your sink up tells us where to point the light first.
The Tissue Test and Other Honest Diagnostics
Dry everything, then wrap plain tissue at each joint and run the sink through its jobs: fill, drain, spray, disposal, dishwasher cycle. The first tissue to spot names the culprit with courtroom confidence. On our visits the same logic runs with moisture meters and a flashlight mirror, plus checks the tissue cannot make. Stop valves get exercised, supply lines dated, the disposal splash seal inspected, and the rim seal probed where counter meets steel.
In the newer builds around Candelas, the usual suspect list shifts toward reverse-osmosis fittings and refrigerator lines, quarter-turn plastic connections that were tightened once in 2019 and never looked at again.
Repairs That Outlast the Cabinet
Supply-side fixes are decisive: new braided lines rated for continuous pressure, stops replaced rather than coaxed when they weep, and tees reseated with proper ferrules. Drain-side work rebuilds the trap assembly with aligned, hand-plus-quarter joints, since overtightened plastic cracks and undertightened plastic drips, and both arrive at the same puddle.
Rotted cabinet floors get honesty: we dry and treat minor swelling, and we tell you plainly when a base needs carpentry beyond our trade. Hiding soft particleboard under a mat helps the mold more than the homeowner. Before we close the doors, everything under there gets a final wipe-down and a dry paper towel left on the floor. If that towel spots by morning, you know before the swelling does, and so do we.
The Disposal and Dishwasher Complications
Half of kitchen-sink leak calls involve the appliances hanging off the drain. Disposal bodies rust through at the seams, their sink-flange putty dries out, and the dishwasher hose clamped to their inlet works loose with vibration. Each has a distinct drip signature, and each is covered in depth on our garbage disposal page. What matters here is sequence: we test the sink's own plumbing first, because replacing a disposal to cure a trap leak is a popular and pointless expense.
Bathroom Sinks, Same Logic, Different Suspects
Vanity sinks run the identical diagnostic but rank their suspects differently. Pop-up drain assemblies loosen and overflow channels crack inside the porcelain. The supply stops, often original to the house in the older stock around Allendale, seize or weep at the packing. The faucet itself sits one layer up and gets its own treatment under our faucet leak service. Wherever the tissue spots first, the repair books at (303) 552-3896 and typically finishes the same visit.
Under-Sink Questions From Arvada Kitchens
The cabinet is wet but everything I touch feels dry. Where is it coming from?
Classic deck leak. Water from the faucet base or rim seal runs down the back of the cabinet where fingers never reach, wetting the floor from behind. A flashlight on the rear wall during a spray-hose run usually catches it in the act.
Are braided supply lines really a big failure risk?
The lines themselves are decent; their age is the risk. The rubber core inside the braid hardens over years, and failures are sudden and pressurized. Replacing them on a schedule, and whenever they came with the house, is the cheapest insurance in the kitchen.
My sink smells but nothing looks wet. Related?
Possibly. A dried-out trap after vacations, a cracked overflow channel harboring residue, or a disposal splash guard past its prime all smell before they show. A smell with no moisture is worth the same inspection, since several of those causes leak next.
Can you fix the swollen cabinet floor too?
We dry, treat, and assess. Minor swelling stabilizes once the leak stops. Structurally soft floors need a carpenter, and we will tell you which you have rather than parking a repair over rot. The leak documentation helps if insurance enters the picture.
Name the Joint Before Touching the Wrench
Supply, trap, deck, or appliance, identified honestly and rebuilt to outlast the cabinet.
☎ Call (303) 552-3896