How to seal a leaky garage door

You may be wondering what a garage door seal is and why you might need one. In this article, we’ll look at the different types of seals available for your garage door and assess which ones will work best in your situation. We’ll also talk about how to install these seals yourself so you can save money on hiring someone else.

How to seal a leaky garage door, Zazzy Home

The most important thing to remember when installing any type of seal around your garage door is to measure twice before cutting once — if the weatherstripping isn’t cut correctly, it won’t fit properly or provide adequate protection against water damage. The first step is always making sure that the rubber seal fits snugly along the edge of both sides of your doorway with no gaps in between where air or water could seep through.

You’ll want to measure the distance from the edge of one side of your door’s frame and then use this measurement to cut a new seal for the other side. If you’re using a seal that has been installed on both edges before, then you can simply remove it and put it back in place on your door. When measuring, be sure that you get an accurate measurement by placing the tape measure as close to the interior of each side of your doorway as possible, rather than at some point in between them.

Pre-made seals: There are garage door seals available that already have pieces cut out of them, so they fit snuggly around both sides of your garage door without any cutting required. These seals cost a little more, but they’re very convenient if you don’t want to spend extra time and effort cutting your own seal.

You can also purchase seals that have the lip/flange ends pre-cut at both sides of the door; these lips are designed to fit snugly between the top edge of one side of the garage door and the bottom edge of another side.

However, this type of seal is more expensive than other seals because you’ll be paying for labor rather than just a specific piece of material. In addition, installation may take longer and require additional tools as opposed to installing a rubber seal that has not been machine-cut already.

In both of these cases, the other advantage is that you won’t be able to see the unsealed edge between the doors. This also means that it is easier to remove and replace a pre-cut seal than it would be if you needed to cut your own.

Cutting your own: The cheapest type of seal for many people is simply cutting their own from one long piece. However, this involves a lot more work since you will have to measure accurately and then use an Exacto knife or similar tool to cut along the line, so the rubber fits together snugly on both sides of your garage door. If you do decide to go this route, make sure that whatever material you are using comes in two parts — one part for each side of the door.

Some materials, such as T-Ply Weatherstrip, have flanges on both sides so that you can snap them together over the doorway to ensure a tight seal. Most types of weatherstripping need to be about 1-2 inches larger than your door in order to be installed correctly; if you’re able to cut something out of one long piece, then this is easy enough for most people — however, it won’t matter much at all unless you’ve measured carefully and made sure that the weatherstripping fits snugly around each side before cutting. If you don’t cut a perfect fit, then air and water will seep through where it isn’t sealed properly.

How to seal a leaky garage door, Zazzy Home

Weatherstripping: A lot of people have wondered how to seal a garage door using foam weatherstripping. Unfortunately, no commercial products will work for this purpose; the types of weatherstripping available today are designed to go around the edge of a doorway and prevent air from leaking out.

The pre-cut pieces of the material sold at hardware stores may look similar to these products, but they’re intended only for use with doors where air leaks are — not so much for preventing water from seeping through your garage door’s edges or bottom.

The most common type of foam strip is made from neoprene and can be easily cut into suitable shapes. This type of material is usually attached together by small expandable strips on each side; as long as you have enough material, these can be put into place to hold the pieces of the foam seal together.

You can also use some other types of weatherstripping for sealing a garage door, such as strips made from urethane or ether rubber. However, you will need to make sure that whatever type of weatherstripping you choose is thick enough so that it won’t let water seep through. In addition, try to avoid using weatherstripping with metal components since this may interfere with closing and opening your doors.

The most important part of determining what type of material would work best for you is considering the cause of your original problem — in particular, whether moisture was leaking between the garage door (in which case finding something curved rather than flat would be best) or if the seal was simply worn out from being used over a long period.

Once you’ve determined this, it will be easier to find a material that matches your needs and can help prevent water from coming in through the unsealed edges.

The type of weatherstripping should be enough to keep out most water, and it should fit snugly together; however, the door is not going to seal itself completely. Therefore, you will still need to take specific steps so that you can close your garage doors.

If you’ve noticed significant amounts of water inside your home that you believe is seeping in through unsealed parts of the house, this is a problem that you need to address immediately.

How to seal a leaky garage door, Zazzy Home

Another useful option for those who want to seal a garage door instead of replacing the entire seal is using flexible caulk between the two pieces. This works best when there’s no visible space between both sides; if there is more than just a thin gap, then sealing with caulk may not be appropriate. This can help prevent water from seeping through the small cracks, and you may be able to prevent a leak in your door if it isn’t very large.

Once again, this is much more useful for preventing air from leaking out than for keeping water from coming into the garage. However, when used properly, sealing with caulk is a good alternative if you’re on a budget or don’t want to spend too much time replacing worn-out weatherstripping. You may need to reapply this as needed over time, but it should last long enough until you’re ready to replace the entire seal.

When choosing materials to seal a garage door, you should consider the type of weatherstripping that will keep out water effectively. If possible, avoid using metal parts if you’re planning on keeping both doors closed — and make sure that whatever material you choose is thick enough so there are no gaps in the seal, as this could also contribute to allowing moisture inside your garage.

You may need to reapply caulk or weatherstripping periodically, but this can be done with little effort; however, it would be much better to find something that’ll last longer without needing replacement or maintenance.

In many cases, simply replacing or repairing broken weatherstripping is enough to stop water from coming through the cracks in your garage door. However, if you have worn-out strips that are not easy to replace, using caulk can also work well for preventing water from getting into your house.

You may need to reapply this seal over time, but it should still be relatively effective at keeping moisture away when used properly and correctly laid on both sides of the crack or gap.

You can prevent many potential leaks by ensuring that your garage doors are always closing properly; if they don’t attach together tightly, then air will leak out more easily than with a good fit between the two doors. This guide will help you identify how to seal a garage door so that you can prevent water from leaking in and keep the doors shut snugly. How to seal a garage door: 

Even if you have a good seal, there are still other ways that air can leak out of the garage and into your home. In particular, make sure that both doors close properly and that they align together, so they fit tightly together. In addition, if you’ve noticed larger amounts of moisture inside your home, this may be due to water seeping in through unsealed parts of the house — such as small cracks between different pieces or strips used to cover these cracks.

You can use caulk or weatherstripping to prevent this from happening but make sure that you choose something thick enough that fits well around the edges without leaving gaps in the seal; otherwise, simply replacing or repairing worn-out weatherstripping could also work well. If you want to choose a fairly convenient seal, caulk can be useful for sealing small cracks; however, if the crack is larger or there are large gaps between the two pieces, you may need to replace weatherstripping on both sides of this gap so that water doesn’t get in through more than one area.

You can easily seal a garage door to prevent leaks by simply ensuring that your weatherstripping is in good condition and that it fits tightly around the edges. The more you’re willing to spend, the longer your seal should last, and the less maintenance is necessary for keeping this leak-proof.

How to seal a garage door: Important notes

While sealing with caulk may be cheap and convenient, you need to make sure that the material you choose is thick enough or there are no gaps, so water doesn’t get through where it’s supposed to be sealed off.

Unfortunately, even when used correctly, caulk can still crack over time — especially in cold weather — but this will usually stay intact long enough while any worn strips of weatherstripping are replaced.

How to seal a leaky garage door, Zazzy Home


If you’ve noticed that your garage door no longer seals, the rubber weatherstripping around the edges of the door may be old and worn out. A quick replacement will prevent water from seeping in and getting into your house through cracks in the doorway. In addition to this, a new sealant can help keep air pollutants like pollen or mold spores outside where they belong! You don’t need any special skills for installation – just some patience while it dries overnight. Thanks for reading our article about how to seal a garage door! Have you experienced similar problems with yours? What was your solution? Let us know below by commenting on this blog post.


Meet Jeff. For the last 10 years, he's been repairing and fixing problem homes - from leaky roofs to faulty wiring. He started blogging about his experiences as a way to help others who might be struggling with home repairs, and he's become something of an expert in the field. Jeff is always up for a challenge, and he loves sharing his tips and advice with others. When it comes to home repairs, Jeff knows what he's talking about. So if you're looking for some help and guidance, be sure to check out his latest guide!

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