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How to Seal a Garage Door From the Inside [3 Easy Hacks]

Silent Home Hub How to Seal a Garage Door From the Inside

The first step on how to seal a garage door from the inside is to use the proper materials.

What’s the point of a rubber strip and several floor seals if those garage door gaps still give way to noises?

But, you don’t have to worry about it anymore.

The quick fix is a little DIY magic ― whether you’re looking into repairing damages or revamping your garage. 

We’ll share 3 simple and foolproof ways on how to seal a garage door from the inside to make sure no noise gets in!

Table of Contents

What You’ll Need For Your Garage Door

Before we seal a garage door from the inside, we need to be fully equipped with the right tools.

Below is a list of what we’ll be needing:

  • Garage Door Seal
  • Weather Seal
  • Door Top Seal
  • Brush Strip
  • Tool box

Now, these are pretty basic and can be found in your local Handyman stores. We don’t need a lot of fancy tools because sealing your garage is easy to do.

How to Seal a Garage Door From the Inside Properly

A garage door is composed of different parts. To name a few, these are the brackets, springs, and garage cables.

However, we don’t need to concern ourselves with all that.

When it comes to sealing a garage door from the inside, we look out for the:

  1. Tops
  2. Sides
  3. Bottoms

These are places where wear and tear appear on your garage doors. It’s also the place where noise easily enters.

As such, repairing them is necessary to provide protection and to keep noise from escaping your garage.

Typically, there are 3 main ways to do so:

  1. Using garage door seals
  2. Weatherstripping
  3. Adding insulation

Take note there are many types of each that we can install, depending on where the gaps are and the type of material it is made of.

1. Garage Door Seals

A go-to for many DIY projects, a door seal is a sealing mechanism that closes the gap between the ground and the door. It’s usually in the form of vinyl or rubber strips. 

Apart from blocking gaps and noise, the role of a garage door seal is to provide added protection and insulation.

It prevents moisture from entering your homeperfect for keeping the cold air out of your garage!

Winter always brings its cold spell, but you can save energy and cut back on electricity expenses while keeping yourself warm with its sealing durability.

Door seals are commonly placed in the corners and the bottoms of a garage door, and it comes in many shapes and sizes.

Types of Floor Seals

We also have to consider its various types. Because it’s the first choice when sealing the garage door, a door sweep, brush, and threshold seal have different uses:

  1. Garage Door Bottom Seal: A.K.A. door sweep, is a strip-type seal. It’s usually attached to the corner bottom of your garage door, but you can also use it to seal the top of the door. It compresses whenever the garage door is closed so that rain, grass, muck, and leaves don’t come in. It’s best for keeping your garage tidy.
  2. Brush Seal: We’re sure you’ve seen this seal type, and you might even own one yourself. It has bristles to help reduce noise and keep out dust. Usually, these are installed at the sides or mounted at the top of the garage door.
  3. Threshold Seal: This seal type is best in preventing water from leaking in. It’s similar to the bottom seal. In this case, however, it’s secured to the floor itself rather than the door. Compared to other seals, it is the most durable with its rubber lip. It comes with its own adhesive, so you don’t need to buy sealants.

What we like about door seals is that it’s easy to install. Just stick it and seal it! You hardly need any other tools for it besides a good old measuring tape. As long as you invest in quality seal brands, you’ll be good to go.

How to Seal Your Garage Door Bottom

To seal the garage door bottom, you’ll need to affix the seal:

  1. Start by cleaning the entire area of your garage (i.e., the garage floor and the door). Debris on the floor and door can get in the way of the process and can impact the stickiness of the adhesive.
  2. Once done, get the measurements and mark them. For accurate results, close the garage door and outline the frame with chalk.
  3. Cut the floor seal according to the measurements.
  4. To directly attach the bottom seals to the bottom of your garage, raise the garage door halfway.
  5. Seal the bottom according to instructions and close the door firmly.
  6. Wait for 24-48 hours for the bottom seals to set in. During this time, do not open the garage door for whatsoever reasons. It can remove the bottom floor seal and damage your property.

How to Seal the Top of the Garage Door

When it comes to the top of the garage door, there are two options: either by weatherstripping the top or using the garage door bottom seal and top seal.

Although both work perfectly fine, a door seal is the better choice to seal the top. It does an excellent job in keeping air sealed inside:

  1. Clean the entire area before you start sealing the garage door.
  2. Measure, mark, and cut. Make sure to get accurate garage door top measurements.
  3. Apply the seal to the upper frame of the garage door. Avoid placing it on the garage entrance itself because it can tear off the rails, springs, hinges, or rollers.
  4. Let it dry for 72 hours. Make sure that there are no glue or other adhesive products along the surface for it to dry faster.
  5. OPTIONAL: As an added bonus (and if you have the budget), you can also consider getting an ultra-quiet garage door opener to reduce the sounds coming from the top of your garage door.

If you’re looking for a visual aid, you can check out this video below:

Using Floor Seals

To seal your garage door, we’ll have to make the most of a garage floor seal or what we know as the threshold seal:

  1. Clean the garage floor.
  2. Close the garage door. Using chalk, mark an outline where the entrance is. The area will be the home of the floor seals.
  3. Raise the garage door and affix the threshold to the floor in place. Follow the product instructions carefully.
  4. Use epoxy to keep it more secure.
  5. Wait for 4-48 hours to cure.

Using the Brush Strip Seals: When to Use One?

If garage doors are in damaged and poor condition, using the brush strip is needed.

Unlike the previous times, you can’t just stick a seal. It can damage your garage door even more. The best way to approach this is by using the brush strip:

  1. Once clean-up and measurements are complete, line up the brush at the height of your repair.
  2. Drill holes in the wall to secure the brush. You may do this as soon as the product is cut in the right size.
  3. Then affix the brush strip to seal the garage door bottoms. Whenever the doors are closed, the brushes splay out as forms of protection.

2. Weatherstripping

When asked how to seal a garage door from the inside, weatherstripping comes up the most. It’s basic but very effective and efficient.

But, what is it exactly?

It’s a type of garage door seal that involves replacing or adding a bottom door seal to stop molding and make the room as air-tight as possible.

It’s a simple insulation material to prevent noise from seeping through the gaps.

It comes in adhesive rolls that an ordinary utility knife can cut up.

We usually see weatherstrips on the sides and the top of a door.

A worn-out garage door makes use of it often. A door stop molding is a great option to replace that rotted one, while V-shaped garage door panel weatherstripping is perfect for sealing wooden grid panels with flat edges.

How to Seal Garage Door Sides

Side gaps form as a result of wear and tire over time.

When it comes to this, using weatherstripping tape on your garage door sides is the best solution. Unlike the other choices, it holds up better having not only relying on adhesives to keep it in place:

  1. Measure door jamb. A way to check if it’s accurate is to measure it twice.
  2. Cut the appropriate sizes.
  3. Place the strips parallel to the door’s side.
  4. And stick!
  5. Push the molding and secure it with nails.
  6. Close the garage door for at least 24 hours.

3. Insulating Your Garage

If your door isn’t insulated properly, cold air can easily come in. What’s more, noises from the outside and the inside can escape in and out of the room.

Insulating and soundproofing your garage door is KEY.

Here are 3 types of garage door insulations used for garages: reflective insulation, foam board insulation, and batt insulation:

  1. Reflective Insulation: Aluminum foil that’s perfect for reflecting radiant heat during the summer season.
  2. Foam Board Insulation: These thin polystyrene walls have one of the highest insulating values.
  3. Batt Insulation: Made up of fiberglass and stuffed into exterior walls.

What is a Well-Sealed Garage Door?

To check if you have installed everything correctly, close your garage door and turn off all the lights on a good sunny day. If light seeps out on the inside, then you probably did it wrong.

A well-sealed garage door will keep noise, bad weather, and pests away.

Because garage doors serve as protective barriers against the wind, rain, snow, bad weather, dirt, air, and even attacks from pests and rodents, damages and gaps that are left on their own can cause you trouble.

Ensure that nothing is forgotten when it comes to sealing gaps around doors!

Do Garage Doors Need to Be Sealed?

Short answer: Yes.

Long answer: Garage doors need to be sealed because of several factors we just mentioned:

  • It will protect your garage from bad weather, snow, water, and floods
  • It will keep rodents and pests from entering your garage
  • It will block dirt and wind from seeping through inside

Are You Ready for a Workshop Upgrade?

Handyman posing inside a garage workshop

There you have it.

If you’re thinking of a way to turn your garage into a personal workspace, this guide on how to seal a garage door from the inside is all the information you need.

Just follow these methods to make sure your next home DIY renovation will be a success!


July 8, 2021 – removed 4 article links, removed 4 product links, added 1 YouTube video

June 21, 2021 – fixed article links, replaced 1 article link, fixed and updated article formatting and content, added 1 new section, optimized content

About the Author


Andrea has always been bombarded by the hustle and bustle outside her home. Living in the city doesn’t get any quieter. The never ending noise from construction, traffic, and dogs barking on the streets day in and day out drove Andrea to a breaking point.

For 3 years, Andrea committed herself to studying DIY hacks, performing soundproofing experiments, and installing noise-free solutions. Now, she lives a quiet life free of the stress from noisy environments.

She hopes to share this knowledge so that others don’t have to endure the noise reigning in their ears and live a peaceful, stress-free life.