What Are the Signs of Water Damage Under a Kitchen Sink?

Start by opening the cabinet doors and inspecting the floor and walls inside. Look for dark rings, brown streaks, or any color change on the wood, which often means water has been sitting there. Warped or swollen panels are another red flag, as moisture makes the material buckle and soften.

Check the pipes themselves for rust, corrosion, or mineral buildup around joints. Peeling or cracked caulk where the sink meets the counter or the cabinet can let water seep through. A small stain might seem minor, but it can hide a slow leak that has been going on for weeks.

• Discolored or stained wood inside the cabinet
• Swollen or warped cabinet panels
• Rust or corrosion on pipes and fittings
• Peeling or cracked caulk around the sink edge
• Water rings on the cabinet floor

Most under-sink water damage starts with a slow leak. A loose connection, a worn washer, or a crack in a supply line can drip for weeks before you notice. The tight, enclosed space traps the moisture, giving it time to soak into the wood and create the conditions for mold.

Cypress's humid climate can make the problem worse, as high humidity slows drying and encourages growth. Even a small leak that would dry out quickly in a drier area can linger here. That is why catching the early signs matters, especially if you live in Cypress.

If you see any of the signs above, do not ignore them. Start by checking the shutoff valve under the sink and turning it off if you feel comfortable doing so. A plumber can fix the leak itself, but the water damage may need more attention from a professional who handles drying and repair.

A water damage inspection can reveal hidden moisture in the walls or floor that you cannot see. The pros use moisture meters and other tools to find wet areas and determine the right way to dry them. If the damage is widespread, they can also help with documentation for your insurance claim, though policies vary.

Policies vary, and your insurer decides what is covered.