How to Repair a Damaged Rubber Garage Door Seal

  • 2-4 hours
  • Intermediate
  • 30-50
What You'll Need
Weather Stripping
Socket Set
Flat Head Screwdriver or Claw Hammer
Wood Sealer
Stiff Brush
Roofing Nails

A rubber garage door seal prevents debris and water from entering into your garage. It also keeps the snow, rain and pests out of the garage. However, the rubber garage door seal can become damaged over time, as drastic weather changes cause the expansion and contraction of the door seal. If the door seal is showing signs of wear and tear and you notice that light is coming into the garage, it is time for a repair. Repairing a damaged rubber garage door seal is not difficult, and you do not need to hire a repair person. Simply follow the step-by-step instructions below for repair.

Step 1 – Loosen the Adjustable Bracket

Steps 1 through 3 are to seal the sides of the garage door. Find the adjustable brackets which are on one side of your garage door. Once you have located the brackets, use a ratchet and socket to loosen the bolt on one of the brackets that is connecting to your garage door, and not the one that is screwed into the garage wall.

Step 2 – Press the Garage Door, and Tighten the Bolt

After you have loosened the adjustment bolt, press the garage door outwards until the gap is completely closed. Be sure that you press the garage door as close to the adjustable bracket as possible. This prevents your garage door from denting. Then, tighten the bolt with a ratchet and socket quickly.

Step 3 – Check the Garage Door Seal

Switch off all the lights and check whether there is any daylight from outside coming in through the side door seal. If so, adjust the next adjustable bracket as in the steps above. If not, proceed to the next step.

Step 4 – Survey the Weather Stripping

Examine the rubber weather stripping located at the bottom of the garage door. If it is damaged or cracked, you will see light coming in under the door.

Step 5 – Remove the Old Weather Stripping

Remove any nails or staples holding the weather stripping to the garage door with a flat-head screwdriver or claw hammer. After removing them, examine the garage door edge again to ensure that it is obstacle-free and smooth.

Step 6 – Apply Wood Sealer

Use a piece of sandpaper to smooth out the door bottom. Use a stiff brush to remove any debris and dust. Then, apply a thin layer of wood sealer to protect the garage door from being damaged by water. To achieve the best results, follow the manufacturer’s instructions. Let it air dry.

Step 7 – Install New Weather Stripping

Place one edge of the new weather stripping onto the bottom left side of the garage door. Allow for ¼ inch extra room, making sure that it lines up with the door's outside edge too. Staple it onto the door. Stretch out the weather stripping, stapling every 3 inches. Make sure that it is not stretched too tightly. When you have worked through to the end of the door, trim the stripping with scissors, and staple it down.

Step 8 – Nail the Weather Stripping

Secure the weather stripping in place permanently using a claw hammer and roofing nails.