How to Install Garage Door Weatherstops (DIY Guide)

Do you need to replace your old garage door weather strip? You are in the right place! Today, I’m walking you through the simple steps to replace that worn-out seal and keep pests, dust, and cold air where they belong – outside.

Last year, I shared a post about garage door maintenance, and it struck a chord with a lot of you. In this guide, I cover essential tips for keeping your garage door running smoothly, including one crucial step – checking the garage door seal along the bottom of the garage door.

After posting, many of you reached out and asked for a complete tutorial dedicated to replacing your garage door weatherstripping – and here we are!

Garage door weather seal story

Replacing the old weather seal on our garage door was actually one of the first DIY projects we did on this house in nearly six years. Our inspector noticed that ours was in rough condition and told us what we needed to do to replace it. We were amazed at how simple it was, and as new homeowners, we felt so proud of ourselves!

However, over time, corrosion took its toll. How do we know it’s time to replace?

When the garage door was in the closed position, we could see gaps of light shining from below, near the garage floor. This was a clear indication that the current seal was no longer doing its job anymore. Another sign was visible corrosion on the weather strip itself.

Why install Weatherstripping?

Installing garage door weather strips is one of the easiest ways to boost the energy efficiency of your garage, especially if the garage is attached to your home. By filling the gaps, you can prevent hot or cold air from escaping, which helps regulate the temperature. Our garage is separate from our house, but we still don’t want it to get too cold, wet, or drafty in there.

But it’s not just about energy efficiency. The weatherstripping process also acts as a protective barrier against pests, such as insects and rodents, preventing them from sneaking inside. Additionally, it helps reduce the amount of dust and debris that can blow into your garage, leaving the space cleaner and easier to manage.

Supplies

Make sure you measure your garage door carefully before purchasing air stripping. They come in many sizes and lengths, so double check your measurements. It is always best to purchase a slightly longer piece that can be cut to fit your door exactly.

A step-by-step guide to installing a garage door weather barrier

1. Remove the bottom seal

First, put on work gloves and place the door in the open position where you can easily reach it.

Most weather protection is installed using a metal track on the bottom panel of the garage door. It should slide right out, but sometimes, it takes a little effort. Be patient and gently pull the old seal off.

My current seal was a little stubborn, but after a lot of tugging, it came off.

2. Clean the channel

Once the old seal is removed, clean the bottom of the garage door and the channel well with a rag. Dirt and debris can prevent the new weather stripping from sliding into place smoothly.

Our room was very dirty, so it was a good thing we cleaned it.

3. Install the new Weatherstripping tool

Again, I assumed I would easily insert the new weather seal directly into the grooves and be done with it. It was a little more difficult than that.

I found that I would eventually route it through the channels and then have to go and pull the new tape through it. It was back and forth like this a few times until I moved the new weather strip all the way down. I suggest working in sections, dragging and adjusting as you go.

4. Trim the excess seal

I ended up leaving about 1/2 inch of weather stripping on each side. To cut them, I used my favorite electric scissors. These things are the best because they can cut anything with minimal effort! You can also choose a sharp knife.

5. Test the door

Finally, make sure your door is closed and that all gaps at the bottom of the door are closed. You want to have a tight seal without any light leaks at the bottom.

How often should you replace weather stripping?

On average, garage door weather strips should be replaced every two to three years, but this schedule can vary depending on your climate and how often you use your garage door opener.

If you live in an area that experiences extreme weather conditions—such as heavy rain, snow, or intense sun exposure (hello, Chicago!)—you may need to replace it more frequently.

Regular inspections are key. Take a few minutes at least once a year to check for cracks, warping, or any signs of damage. Catching problems early can help you avoid bigger problems in the future and ensure that weather stripping lasts as long as possible.

Final thoughts

Replacing a garage door weather strip is one of those DIY projects that is easier than it sounds and worth the effort. In about an hour, you can close those annoying gaps, keep cold air out, and save some money on your energy bills.

Plus, there’s something very satisfying about a quick fix that makes a big difference. So grab your tools, measure twice, and get to it!