What to Do When Water Leaks Under Kitchen Sink


If you’ve ever had a water leak or spill under your sink, you know how inconvenient and potentially damaging it can be. In this blog post, we’ll go through the steps you can take to assess, clean up, and repair any damage that may have occurred.

I had this happen to me recently, so I’m speaking from my personal experience here. Caveat: If there’s any potential for major damage or mold growth beyond a small water spill, you should bring in a pro from the get-go.

Stop the Leak and Assess the Damage

The first thing you want to do when you discover a leak or spill under your sink is to stop the source of the water. In some cases, this might mean fixing a broken sink sprayer or tightening a loose pipe fitting.

You can also turn off the water supply to the sink by turning the knobs under the sink clockwise or, in the case of a more serious break, shutting off the main water supply to your home.

Once the source of the water has been addressed, you can begin assessing the extent of the damage. This will likely involve removing any items stored under the sink and checking for signs of water damage, such as warped or damaged cabinetry.

Cleaning Up and Drying Out the Area

First, clear out the space under the sink by removing all items. Then, use paper towels or a mop to dry up any standing water.

To help speed up the drying process and prevent mold growth, leave the cabinet doors open and place a fan in front of the area for at least 24 hours. If possible, use a powerful fan to increase airflow and promote faster drying.

Inspecting for Damage and Repairing If Necessary

Once the area has had time to dry, inspect the cabinet for signs of damage. This may include warping, swelling, or other visible signs of water damage. In some cases, you may need to use a wood filler to repair any damaged areas and repaint the cabinet to restore it back to normal, or just clean the cabinets up.

The most important thing to avoid when dealing with water damage is mold growth. Be sure the area is completely dry before closing the cabinet doors. Keep an eye out for any signs of mold, such as musty odors or visible spores. If you suspect mold growth or have concerns about the extent of the damage, it’s best to consult with a professional.

When to Call in a Professional

In some cases, water damage under a sink may be too extensive for a DIY approach. If you have a burst pipe or a significant amount of water has soaked the area, it’s best to contact a professional water damage restoration company.

These experts have specialized equipment and knowledge to thoroughly dry out and repair the affected area, helping to prevent long-term problems like mold growth.

Additionally, if you need to make a homeowners insurance claim, contacting professionals early on in the process can be beneficial.


Dealing with water damage under a sink can be a hassle, but following these steps can help you address the problem quickly and effectively.

Remember, the key is to stop the source of the water, assess the damage, clean up and dry the area, and repair any damage as needed. Always err on the side of caution and consult a professional if you have concerns about the extent of the damage or suspect mold growth.

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Key Takeaways

  • Switch off the water at the knobs or main water meter if there is a leak.
  • Assess and clean up the damage by removing all items from underneath the cabinet and drying up any remaining water.
  • Keep the cabinet doors open for 24 hours and use a fan to dry the area out.
  • Check for any signs of mold growth, such as musty odors or spores, and bring in a professional if necessary.
  • If the damage is extensive, consider bringing in a mitigation company or making a homeowners insurance claim.