How to Install Weatherstripping on a Garage Door

Weatherstripping acts as the primary defense for your garage against the elements. Over time, rubber seals become brittle, crack, or compress, leaving gaps that invite rain, debris, and rodents into your workspace. Replacing these seals is one of the most effective ways to climate-control your garage and protect the structural integrity of the door frame. Getting this done well means more than just slapping on new rubber. It requires a clean surface, precise measurement, and the right tension to ensure the door closes flush against the floor without binding. Once finished, you will immediately notice a quieter operation and a significantly tighter seal against the outside world.

  1. Strip Out the Old Seal. Open the garage door halfway and lock it in place. Use a utility knife to slice through the old, stuck-on rubber, then use a flathead screwdriver or pry bar to pull out the old stripping from the tracks.
  2. Scrub Down the Frame. Scrub the door tracks and frame thoroughly with a wire brush to remove rust, peeling paint, or dried mud. Wipe everything down with a clean rag dampened in mineral spirits to ensure the new adhesive or seal fits perfectly.
  3. Measure Twice, Cut Once. Measure the width of your garage door precisely. Cut your new rubber seal to length using heavy-duty shears, leaving about an extra inch on each side to account for shrinkage and perfect fitment.
  4. Slide In the Bottom Seal. Slide the new T-shaped rubber seal into the metal channel at the bottom of the garage door. Use a second pair of hands to guide the rubber while you pull it along the length of the door.
  5. Secure the Side Strips. Close the garage door completely. Nail or screw the vinyl-and-rubber side stripping into the door frame, keeping it snug against the door, but not so tight that it prevents the door from moving freely.
  6. Fine-Tune for Smooth Operation. Cycle the door open and closed several times to ensure it doesn't catch or bind. Make minor adjustments to the side strips if the door feels sluggish or pops open due to excess friction.