Kitchen Sink Leak Subfloor Damage — Fruit Heights, UT

Loss Type: Category 1 Water / Kitchen Sink Drain Leak
Location: Fruit Heights, UT near Davis Boulevard
Response Time: Next-day scheduled
Job Duration: 4 days
Insurance: No – homeowner self-pay

The Situation

A homeowner near Davis Boulevard in Fruit Heights noticed their kitchen cabinet floor had developed a soft spot when they pulled out the base cabinet drawer. Investigation revealed a slow drain line leak at the P-trap connection under the kitchen sink that had been seeping onto the cabinet floor for an unknown period — likely several weeks based on the extent of the wood degradation in the cabinet base. The cabinet floor panel had partially delaminated and the subfloor beneath showed significant moisture accumulation.

The homeowner repaired the P-trap themselves and called Upkeep the following morning to assess and dry the structural damage.

The Problem

Drain line leaks introduce Category 1 water in early stages but can shift toward Category 2 classification depending on what materials the drain water contacts and how long it has been sitting — this is why professional water damage restoration response matters even for seemingly minor kitchen leaks. In this case the water had been pooling on the cabinet floor and absorbing into the subfloor for long enough that the cabinet floor panel was unsalvageable and the subfloor beneath had reached moisture levels well above the threshold for secondary mold risk.

Moisture readings under the cabinet showed the plywood subfloor was elevated across a 28-square-foot area extending beyond the cabinet footprint — indicating water had migrated laterally under the flooring toward the kitchen island and the adjacent pantry wall. A pin meter reading at the base of the pantry wall confirmed moisture had wicked 6 inches up the drywall on the pantry side.

The homeowner elected not to file an insurance claim given the gradual nature of the loss and its likely exclusion under their policy language for slow seepage.

What We Did

We removed the saturated cabinet base panel and the toe kick to allow direct access to the subfloor beneath. The dishwasher adjacent to the sink cabinet was pulled from its bay to expose the subfloor in that zone as well — moisture readings confirmed water had tracked under the dishwasher bay subfloor and required drying from above.

Rather than cutting out the subfloor we deployed an injectidry floor drying mat system as part of our structural drying process across the full moisture-affected area to draw moisture up through the subfloor from above. Daily readings tracked progress across the 28-square-foot zone. The pantry wall base drywall was removed to 8 inches on the pantry side to expose the bottom plate and allow the wall cavity moisture to clear.

The drying system included:

• Injectidry floor mat system covering the full 28-square-foot subfloor zone
• 2 air movers directed at the open cabinet bay subfloor and pantry wall base cavity
• 1 LGR dehumidifier running continuously in the kitchen
• Twice-daily moisture readings on subfloor, bottom plate, and pantry wall drywall base

Subfloor readings dropped consistently through days 2 and 3. All materials reached target moisture content on day 4 without requiring subfloor replacement.

The Outcome

The subfloor was saved entirely — no cutting or replacement required. The cabinet base panel and the small section of pantry wall drywall were the only materials replaced. The homeowner’s contractor rebuilt the cabinet base, reinstalled the toe kick, and patched the pantry drywall. Total remediation cost was significantly lower than a subfloor replacement scenario would have been. We provided a written drying report for the homeowner’s records.

“I was expecting them to tell me the whole subfloor needed to go. They used a mat system to dry it without cutting anything out and it worked. Saved me a significant amount of money compared to what I thought this was going to cost. Very knowledgeable crew.”

— F. Barlow, Fruit Heights UT

We’ve also documented a sprinkler line rupture we handled nearby in Fruit Heights and a water heater garage flood in Fruit Heights — together these projects reflect the range of water damage scenarios we regularly resolve in this area. View more of our water damage case studies from across Davis County.