How to Replace Your Garage Door Weatherstripping

Garage door weatherstripping is the primary line of defense between your climate-controlled interior and the unpredictable outdoors. Over time, constant friction against the driveway and exposure to UV rays turn the rubber brittle, causing it to crack or tear. Replacing this seal is a high-impact, low-cost project that instantly improves insulation and prevents pests from entering the structure. Done well, a new seal sits flush against the concrete floor without creating a trip hazard or putting unnecessary strain on your garage door opener. The secret lies in ensuring the track is clean and the rubber profile matches your specific door model. Once completed, your garage will be quieter, cleaner, and significantly more energy-efficient.

  1. Lock Down the Door First. Open the garage door fully to access the bottom track comfortably. Place a ladder or a support prop to ensure the door cannot accidentally close while you are working underneath it.
  2. Extract the Old Rubber. Pull the old weatherstripping out of the aluminum track at the bottom of the door. If the rubber is stuck due to years of debris, use a flat-head screwdriver to gently pry it loose from the channel.
  3. Scour the Channel Clean. Wipe out the aluminum channels with a rag and a mild cleaning solution to remove dirt, dried mud, and grit. Use a wire brush if there is significant buildup or rust inside the tracks.
  4. Lubricate Before You Install. Lay out your new rubber seal along the length of the door to get it straight. Apply a thin coat of silicone spray or dish soap into the aluminum tracks to act as a lubricant for the installation.
  5. Feed the Seal Steady. Starting at one end, feed the T-shaped edge of the new seal into the tracks. Work in tandem with a partner, with one person feeding the rubber into the track while the other pulls it across the length of the door.
  6. Trim and Secure the Ends. Once the seal is centered and seated fully, use a utility knife to trim the excess rubber, leaving about an inch of overhang at each end. Fold these ends inward to prevent the seal from sliding out over time.