Skip Navigation

How to Install Garage Door Bottom Seal


Two men crouching by a garage door to install new garage door weatherstripping

If the weather seal (aka bottom seal or weatherstripping) on your garage door is cracking or not making a tight seal to the ground, it’s time to replace it. We’ll walk you through how to replace your garage door weather seal in 6 steps.

What you’ll need to replace your garage door weather seal:

  • New garage door weather seal
  • New retainer and self-tapping screws (if your retainer is rusty or coming apart from the door)
  • Socket wrench or screwdriver (depending on how your track is attached to the garage door)
  • Bucket of warm water
  • Rag
  • Concentrated dish soap (like Dawn®)
  • Strong scissors
  • Extra person

Tip: Make sure you have the right weather seal for the retainer (the retainer is the metal strip on the bottom of the garage door that has a track for the weather seal). If the top of the seal doesn’t match the aluminum retainer, you won’t be able to complete the job.

How to replace your old garage door weather seal:

  1. Remove the retainer by using the socket wrench or screwdriver.

    Tip: If you’re cutting a new retainer, go to minute 2:15 of this video. (How do you know if you need a new garage door retainer? If the retainer is rusty, coming apart from the door or not sealing properly, buy a new one.)

  2. Remove the old rubber seal by pulling it through the track.

  3. Wash the retainer track with a rag and soapy water to remove residue. (Don’t skip this! It will help when it’s time to install the new garage door weatherstripping.)

  4. Squeeze a small amount of dish soap in the retainer track to lubricate it. Then, feed the weather seal into the track (ridges of the seal facing outward) while the other person pulls it down the retainer.

  5. Cut off the excess seal with scissors. If there are caps for the weather seal, put them on the ends.

  6. Reattach the track to your garage door while the other person holds it in place.

There you have it! A new weather seal to keep out rodents, drafts and dust. Nice job!

How to install weatherstripping on your garage door
How to Install Garage Door Weather Seal