How Can I Fix Moisture Getting Inside My Car?

by Leanne Clute

There are many reasons why moisture gets on the inside of a vehicle. Most often the seal between a door panel and frame has deteriorated or a window is not rolled all the way up. Alternatively, an improperly installed windshield or door window can also cause moisture in a vehicle. Some instances can be fixed at home, while others require professional assistance.

Clean along the door frame to remove dirt and debris that can create gaps in the seal and result in moisture getting inside the vehicle.

Clean the vehicle. Some leaks maybe caused by an excess buildup of dirt and grime on the inside panels of the car. Give the vehicle a thorough cleaning and detailing. This should include the door track, door latch and weatherstripping areas on all vehicle openings.

Determine where moisture is leaking in. While it may seem obvious by the spots in a vehicle, it is still beneficial to double check. There may be more than one point of entry for moisture. Moisture is most often experienced inside of a vehicle after a heavy rain or several inches of melting snow. To determine this, you will want to water down the vehicle with a hose. Have one person on the inside to indicate where the leak is coming from.

Cut weatherstripping in the section where leak is if this is the source of the leak. Weatherstripping is designed to keep moisture outside and warm or cool air inside of a vehicle. Over time this can deteriorate from road grime, dirt and some abrasive chemicals that are used during car cleaning. Using the X-Acto knife, cut a slit downward--to the car frame--at two ends of the strip. This is rather flexible, therefore it should be easy to pull the weatherstripping off of the frame of the vehicle.

Scrape adhesive residue from car frame. Using a plastic scrape, slowly remove the remaining adhesive from the car frame. Once this has been removed, use soap and water to thoroughly clean the area of any residue, dirt or debris.

Cut and apply new weatherstripping. Measure the space and cut a new piece of weather stripping to ΒΌ inch longer than the measured length. Apply adhesive to the vehicle frame and attach new weatherstripping. Tuck the extra edge into the old weatherstripping. This alleviates any gaps in protection.

Apply automotive protectant to the weatherstripping and vehicle frame. Protectant creates a coat that keeps weatherstripping flexible so that it will not crack or break.


  • check If the leak appears to be coming from a window or windshield seek professional help. There are specific tools needed to remove and reset a windshield.
  • check Only cut the space of weather stripping that is bad. Do not remove and replace the whole strip around the window.
  • check Keep up on car washing and apply automotive protectant after each wash to extend the life of the weather stripping.

Items you will need

About the Author

Leanne Clute started writing in 2009 with her work published in several magazines, including "All About Golf," "All About Snow," "All About Bikes," "All About Four Wheels" and "All About Outdoors." She holds an Associate of Science in mortuary science through Hudson Valley Community College, where she is also pursuing a Bachelor of Business in business management.