How to replace garage door bottom seal?

How to replace garage door bottom seal?


Replacing the bottom seal of a garage door is an essential maintenance task that helps to keep your garage clean, dry, and free from pests. Over time, the bottom seal can become worn out or damaged, leading to drafts, water leaks, and unwanted critters making their way into your garage. In this article, we will guide you through the process of replacing the garage door bottom seal, ensuring that your garage remains well-insulated and protected.

Step 1: Measure and Purchase the Correct Seal

Before you begin the replacement process, it’s crucial to measure the length of your garage door to ensure you purchase the correct size of bottom seal. Measure the width of the garage door opening and add a few inches to allow for a proper fit. Once you have the measurements, you can purchase the appropriate bottom seal from a local hardware store or online retailer. Make sure to choose a seal that is compatible with your garage door type and material.

Step 2: Prepare the Garage Door

To replace the bottom seal, you will need to open the garage door fully. Disconnect the power to the garage door opener to prevent any accidental activation during the replacement process. Then, raise the door to its highest position and secure it in place using clamps or locking pliers. This will ensure that the door remains stable and won’t move while you work on replacing the seal.

Step 3: Remove the Old Bottom Seal

Inspect the bottom of the garage door to locate the existing seal. In most cases, the seal is attached using screws or nails. Use a screwdriver or pry bar to remove the fasteners and detach the old seal from the door. Take care not to damage the door or any other components while removing the seal. Once the old seal is removed, thoroughly clean the bottom of the door to remove any dirt or debris.

Step 4: Install the New Bottom Seal

Unroll the new bottom seal and place it along the bottom edge of the garage door. Make sure that the seal is centered and aligned properly. Use a marker or pencil to mark the positions for the fasteners. Depending on the type of seal you purchased, you may need to use screws, nails, or adhesive to secure it in place. Follow the manufacturer’s instructions for the specific installation method.

Step 5: Test and Adjust

After installing the new bottom seal, carefully lower the garage door and test its operation. Ensure that the door opens and closes smoothly without any obstructions or interference from the seal. If necessary, make any adjustments to the seal’s position or length to ensure proper functionality. It’s important to achieve a tight seal without impeding the door’s movement.


Replacing the bottom seal of your garage door is a relatively simple task that can have a significant impact on the overall performance and condition of your garage. By following the steps outlined in this article, you can ensure that your garage remains well-insulated, protected from the elements, and free from unwanted pests.


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