How to Replace Garage Door Weatherstripping
Weatherstripping seals your garage door against drafts, pests, water, and debris. Over time, these seals wear out, crack, or flatten, reducing energy efficiency and allowing moisture inside. This guide shows you how to inspect, remove, and replace weatherstripping on your garage door.
Signs Your Weatherstripping Needs Replacement
- Visible cracks or gaps
- Flattened or brittle rubber
- Water or light coming through the bottom or sides
- Drafts or temperature changes inside the garage
- Pests entering around the door
Types of Garage Door Weatherstripping
- Bottom Seal: Rubber or vinyl insert that fits into a retainer
- Side Seals: Vinyl or rubber strips attached to the jambs
- Top Seal: Mounted above the door to block drafts
- Threshold Seal: Adhesive strip installed on the floor
What You’ll Need
- Replacement weatherstripping
- Utility knife
- Flathead screwdriver
- Measuring tape
- Drill or screwdriver (for side/top seals)
How to Replace the Bottom Seal
1. Open the Door Slightly
Lift the door just enough to access the bottom seal without disengaging the opener.
2. Remove the Old Seal
- Pull the seal out of the retainer channels
- Use a screwdriver if it’s stuck
3. Clean the Retainer
- Remove dirt, rust, and debris
- Ensure channels are clear for the new seal
4. Install the New Seal
- Feed the T‑shaped edges into the channels
- Pull evenly across the length of the door
- Trim excess with a utility knife
How to Replace Side & Top Seals
1. Remove Old Seals
- Unscrew or pry off the existing strips
- Clean the jamb surface
2. Measure & Cut New Seals
- Cut to length with a utility knife
- Ensure a snug fit against the door
3. Install New Seals
- Attach with screws or nails
- Press firmly to ensure a tight seal
When to Consider a Threshold Seal
- Uneven garage floors
- Water intrusion during heavy rain
- Gaps under the door even with a new bottom seal