How to Install a Garage Door Weather Seal?

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. Our team at North Shore has been in the business for decades, and below you’ll find an easy DIY garage door guide for installing a bottom seal on your garage door as well as replacing the seal’s retainer, if necessary.

Why Should You Replace or Install a Weather Seal?

If you’ve ever felt air blowing through the cracks in a shut door, you know being closed does not equal being sealed. Weather seals act as a protective sealant from the garage door to the garage floor and block harmful pests, debris, and hot and cold air from leaking into a building. Installing seals can lower unnecessary utility bills with their insulation and help keep your space clean from unwanted visitors and dirt.

What to Know Before Installing a Garage Door Weather Seal?

Should You Replace Your Retainer?

Before installing your new seal, decide if you also need to replace your retainer. The retainer is the metal strip on the bottom of the garage door that has a track for the weather seal. If the track is rusty, coming apart from the door, or not sealing properly, we suggest replacing it while adding a new weather seal for less hassle.

Tip: If you’re replacing your retainer, our Universal Weather Seal Kits have everything needed for installation, and the seal is guaranteed to fit the included retainer.

Decide Which Seal Style You Need

When buying a replacement weather seal, you’ll need to know the length of the seal, the width, and the “style.” Measure the width of the garage door to find your seal length. Don’t rely on the length of the existing seal in case it has shrunk. Lie the existing seal flat and measure the width. Look at the top of the seal, where the edges go into the retainer. This is your “style” of seal. See below for identification:

The T-shaped style is most common seal, with the tops being “T” shaped. For T-style seals, you’ll need to measure the top end of the “T” and order the same size.
P-bulb seals are shaped like a "P" and made from a black vinyl compound for strength and durability. Bottom Seal, Windsor P-Bulb, Per Foot (107-0045)
Bead End Weather Seals are easy to install and built to be durable. Garage Door Bottom Bead End Vinyl Weather Seals

Note: The style of seal is what allows it to fit in the track. If the top of the seal doesn't match the aluminum retainer, you won't be able to complete the job. For bottom weather seal replacement, we recommend buying EPDM, not vinyl seals. Learn more about choosing the right material here!

What Do You Need to Replace Your Garage Door Weather Seal?

Before installation, be sure you have the following materials at your disposal:

How to Replace Your Old Garage Door Weather Seal?

Make the most of your home repairs by referring to our step-by-step tutorial and full video below to get your new bottom seal installed in no time!

To begin, lift your door and remove the retainer from the bottom of your garage door by using the socket wrench or screwdriver. Remove the old rubber seal by pulling it through the track.
Remove the old rubber seal by pulling it through the track.
If installing a new retainer, cut it to size. Measure the length of your door before cutting the retainer. Also mark and cut off the edge of the retainer for a proper fit installation. The retainer can be cut with a hacksaw and we recommend filing the edges to reduce sharp corners on the retainer.