The short answer
Common Faucet Leak Sources
A dripping faucet handle is usually due to worn internal components. The rubber washers or ceramic cartridges inside the valve seat can degrade over time, failing to create a watertight seal. This allows water to escape even when the handle is fully turned off. Replacing these small parts often fixes the issue.
Leaks originating around the faucet's base, where it meets the countertop or sink, indicate a different issue. A loose mounting nut or a degraded seal can allow water to seep out. This water runs down the fixture and can pool, potentially damaging cabinetry or subflooring if not addressed.
Consequences of a Leaky Faucet
Beyond water waste, a leak causes persistent moisture that damages materials. Water from a faucet base or supply line leak soaks into wooden cabinet bases and particle board shelves, causing them to swell and warp. Over time, this moisture weakens the structural integrity of your cabinetry and creates an ideal environment for mold growth.
If water penetrates the cabinet floor, it can reach the subfloor. Plywood or oriented strand board subflooring absorbs water, leading to soft spots, sagging, and eventual rot. This damage is often hidden until it becomes severe, requiring costly repairs to the flooring and potentially the underlying joists.
Immediate Steps When You Find a Leak
Your first action should be to stop the water flow. Locate the shutoff valves under the sink and turn them clockwise until they stop. If those valves are also leaking or missing, you may need to turn off the main water supply to your home. This prevents further water release while you assess the situation.
After stopping the water, contain any standing water. Use towels to soak up visible pools in the cabinet or on the floor. Place a bucket under the leak to catch any residual drips. It is crucial to dry the area thoroughly to prevent secondary damage like mold or wood decay from setting in quickly.
When to Call a Professional
For complex leaks or if you are unsure of the source, contact a local water damage pro. They have specialized tools like moisture meters and thermal cameras to detect water you cannot see behind walls or under flooring. They can assess the full extent of moisture migration and plan the proper drying strategy.
If the leak has been ongoing, significant hidden water damage is likely. The pros have industrial-grade air movers and dehumidifiers to dry structures properly. They can also advise if cabinetry, drywall, or subflooring needs removal and replacement. For the faucet repair itself, a plumber is the right professional to fix or replace the fixture.
Water damage does not wait
Every hour counts once water gets into floors and walls. One call starts the response.
Call Now (208) 537-2633Frequently asked questions
Can a leaky faucet cause mold?
Yes. Constant moisture from a leak creates perfect conditions for mold growth, especially in dark, enclosed spaces like under a sink. Mold can develop on damp wood, drywall, and organic materials within 24 to 48 hours. If you smell a musty odor, a professional mold inspection may be needed.
Will my insurance cover damage from a faucet leak?
It might, but coverage depends on the cause and your policy specifics. Sudden, accidental leaks are more likely covered than damage from long-term neglect. You should document the damage and contact your insurer promptly. Policies vary, and your insurer decides what is covered.
How much does it cost to fix water damage from a leak?
Costs vary widely, from a few hundred dollars for minor drying to several thousand for subfloor and cabinet replacement. The final price depends on the leak's duration, the materials affected, and the extent of hidden damage. A water damage inspection provides a clearer scope and cost estimate.