How to Seal a Garage Door from the Inside

In this article, I’ll be guiding you through some of the best methods on how to seal a garage door from the inside.

If you plan on operating loud equipment’s such as shop vacs it’s paramount to have your garage door sealed.

Additionally, sealing the garage door will also ensure that you keep insects and small rodents away from the garage.

You can use a quiet garage door opener to compliment this process.

A-List of Hacks on How to Seal a Garage Door from the Inside

Below are some of my recommended methods on how to seal a garage door from the inside.

1. Seal the Garage Door Bottom

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The easiest way to tell if the garage door bottom needs sealing is to turn off the lights in the garage during the day and check if you can see any light entering from the bottom of the door.

In case the bottom allows some light through, then you need to seal it.

There are two effective ways of sealing the garage floor bottom. Using bottom seals or floor seals.

2. Using Floor Seals

Floor seals are ideal because they are easy to install and effective in keeping off light and noise from outside.

These seals also help keep dirt and vermin at bay, as well as rain and wind during bad weather.

Floor seals function like the acoustic thresholds used for front door soundproofing.

Installing these seals is easy, and the steps involved include:

Cleaning the floor to ensure no dirt particles, oil spills, or any substances that can compromise the floor seal is present.

Cutting the floor seal to make the length of the garage door.

You may need to measure the garage door first and get a hack saw to cut the floor seal.

Place the floor seal under the door with the raised rubber lip on the inner side and don’t remove the protective cover.

This process should be completed when the door is closed

Mark the spot where the seal touches the floor.

Ensure that this area is well covered with the seal as directed by the manufacturer.

Give the seal a day or two to dry.

3. Use Bottom Seals

Bottom seals are designed to clip in place, so no glue or screws are needed during installation. All you need to do is slip them under the garage door.

Ensure that you have cut these U-shaped seals to fit your garage door.

This way, the door closes well, and no spaces are left.

4. Use Concrete

If you want to know how to seal a garage door from the inside when the floor is the problem, you may consider using concrete.

In the case of metallic garage doors, cracks may form at the floor, creating gaps that allow air, dirt, and other elements in the garage.

To take care of this problem, the easiest thing to do is use concrete to seal them.

Filling these gaps with concrete will raise the garage floor level and ensure that the door seals well when you look at it from the inside.

If you are handy, this can be a fun DIY project for you. You can also hire a professional to fill the cracks for you at a small fee.

5. Seal the Top of your Garage Door

Spaces at the top of your door will let noise, dirt, and other elements into your space.

If you want to isolate outdoor noise completely, you also have to consider the top and not just the garage door bottom.

Rubber strips

Get a rubber strip and use it to seal the top side of the door. Just ensure that you have cut the seal to match the door length, so no gaps are left.

Sealing the door top will not only soundproof your garage, but it will also help keep your home warm during winter.

You may notice a significant drop in your power bills after sealing your garage door’s top side.

This is because hot air rises during the cold months, and if there are any spaces above the door, this hot air will escape to the outside; hence more energy is used to keep the house warm.

6. Seal the garage door sides

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Weatherstripping is perfect when the problem is coming from the sides.

These spaces, just like the door top and bottom, are notorious for letting insects, vermin, dirt, and noise inside the house.

Mostly, gaps on the sides of the garage door are caused by aging and improper fitting. Whatever the cause, weatherstripping can help take care of this problem.

The installation process is straightforward, and you do not need any specialized tools.

Just ensure that you have the right measurements, so you know how to cut the weatherstripping to fit the door.

Once you have cut the weatherstripping to size, use rubber adhesives to glue them to the garage door. Notable adhesives include Sikaflex 1A by Sika.

Once you are done installing the weatherstrip, close the door and let it remain closed for a day.

This will give the strip enough time to glue to the door.

Ensure that no glue is left on the door surface as this may rip off the seal when you open the garage door.

If the garage door is too small for the garage, weatherstrips may work for a while, but you may need to seek a permanent solution in the long run.

Having a garage door that doesn’t close well will raise your energy bills, not to mention the damage this can cause to your property.

7. Garage Door Insulation

Instead of just installing some door seals, you can opt to a step further and improve your garage door as well.

Insulation is another great option If you are wondering how to seal a garage door from the inside.

This method will ensure that you have a quieter and warmer home in winter and a much cooler one in summer.

Insulation can be inexpensive, and with just 200 dollars, you can have your garage door insulated.

Types of garage door insulation readily available in the market include:

Foam board insulation – done using polystyrene material grip panels. The panels are thin but quite effective in insulation.

Reflective insulation – made of several layers of insulation material.

The primary material is polyethylene and cardboard with aluminum foil on both sides for heat insulation.

Batt insulation – Made of fiberglass. This insulation comes with paper or foil that helps shield it from vapor and air.

Choose whichever insulation you think will work best for your garage door and install it as directed by the manufacturer.

These insulation types are made with the end-user in mind, and you often do not need any specialized skills or tools to put them in place.

Final Thoughts on How to Seal A Garage Door from The Inside

Above are some of recommended hacks on how to seal a garage door from the inside.

You will not only reduce unwanted noises which may cause neighbor conflict but also be able to keep away rodents, snow, insects, and pests away from the garage.


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