How To Seal A Garage Door On The Sides: 5 Simple Methods

by Mohammad Sameer

How To Seal A Garage Door On The Sides: A Step-by-Step Guide

Are you wondering how to properly seal your garage doors on the sides and prevent drafts from coming in? We’ll also discuss common issues that can arise from inadequate sealant and give you an overview of different methods you can use to effectively seal those garage door seals.

Sealing the sides of your garage doors with a reliable sealant is crucial for several reasons. It helps to prevent drafts and keep out unwanted elements from the outside, ensuring a well-insulated space between your walls and the doors.

it helps keep unwanted elements outside, such as dust, pests, drafts, and garage door seals. The door stops and door frame of garage doors play a vital role in maintaining the integrity of the seal.

It also prevents heat or cold air from escaping through the door seal, making your garage doors and door frame more energy-efficient by eliminating any gap.

Proper side sealing of garage door gaps and door frame spaces enhances security by reducing potential entry points for burglars.

Garage door seals play a crucial role in ensuring the safety of your property.

When your garage door isn’t adequately sealed on the outside, various problems with molding, views, and the jamb can occur.

These issues may include water leakage during rainstorms, increased noise levels from outside traffic or neighbours, and even reduced insulation efficiency due to garage door gaps.

To address these problems, it is recommended to install a garage door seal or weatherstripping seal to prevent water and air leakage.

Additionally, adding molding around the garage door can help improve insulation and reduce noise. By properly addressing these issues through side sealing techniques, you can improve both the functionality and comfort of your garage space.

This includes ensuring that the molding is secure and providing a barrier against outside elements, while also considering the views from inside the garage to enhance the overall experience.

In our next sections, we’ll explore different methods for side sealing in detail and provide practical tips to help you choose the right approach for your specific needs.

We’ll discuss various views on side sealing techniques and offer guidance on selecting the most suitable method for your requirements. So let’s get started!

Different Methods to Weather-Seal a Garage Door

An image of tools and materials for sealing a garage door, including a caulk gun, weatherstripping, insulation, a putty knife, gloves, safety glasses, and a measuring tape.

To effectively weatherproof your garage door and keep out the elements, there are several methods you can employ. One method is to install weatherstripping seals along the edges of your garage door.

These side seals act as a barrier against rain, wind, and other outdoor elements. By properly sealing your garage door with weatherstripping seals, you can ensure that your garage remains protected from the weather while also improving energy efficiency.

Additionally, installing weatherstripping seals can help reduce noise and provide better insulation for your garage.

So, if you want to keep your garage comfortable and protected from the elements Let’s explore some of the different ways you can seal a garage door on the sides.

Brush Seals for Effective Weatherproofing

Brush seals are an excellent option for sealing gaps around your garage door. These seals consist of thousands of bristles that create a barrier against wind, dust, and pests.

Installing brush seals on the sides of your garage door helps to prevent drafts and maintain a comfortable temperature inside.


  • Easy installation process.
  • Durable and long-lasting.
  • Provides effective insulation.


  • May require periodic maintenance to ensure proper functionality.
  • Can accumulate dirt and debris over time.

Vinyl or Rubber Astragal Seals for Added Insulation

Vinyl or rubber astragal seals are another popular choice for weather-sealing garage doors. These flexible strips attach to the bottom edge of the door, creating a tight seal when closed.

Garage door seals not only help keep out cold air but also provide additional insulation against noise and moisture.


  • Offers excellent insulation properties.
  • Reduces energy costs by preventing heat loss.
  • Helps minimize noise from outside sources.


  • Requires careful measurement and installation to ensure proper fit.
  • May need occasional replacement due to wear and tear.

Installing PVC Stop Molding as a Cost-effective Option

If you’re looking for a cost-effective way to seal your garage door on the sides, consider installing PVC stop molding. This type of molding is made from durable plastic material and is designed to fit snugly against the edges of the door.

It creates a barrier that prevents drafts, insects, and debris from entering your garage.


  • Affordable option compared to other sealing methods.
  • Easy installation process with basic tools.
  • Provides adequate protection against weather elements.


  • May not offer the same level of insulation as other sealing methods.
  • Requires periodic inspection and maintenance to ensure proper function.

Using Garage Door Side Seal Kits for Comprehensive Protection

For comprehensive protection, garage door-side seal kits are an excellent choice. These kits typically include a combination of brush seals, astragal seals, and PVC stop molding.

By using these different components together, you can achieve maximum weatherproofing and insulation for your garage door.



  • Can be more expensive than individual sealing methods.
  • Installation may require some expertise or professional assistance.

How To Seal A Garage Door On The Sides – step by step

How To Seal A Garage Door On The Sides

To effectively seal your garage door on the sides, follow this step-by-step guide that will help you keep out drafts, pests, and unwanted elements.

Measure and Cut Weatherstripping to Fit the Sides of the Garage Door

Man using a measuring tape to measure weatherstripping for sealing a garage door, ensuring a tight fit to prevent air leaks and improve energy efficiency.

The first step in sealing your garage door on the sides is to measure and cut weatherstripping that fits perfectly. Use a tape measure to determine the length needed for each side of the door. Make sure to account for any gaps or unevenness in the door frame.

Once you have your measurements, use a utility knife or scissors to cut the weatherstripping accordingly.

Attach Weatherstripping Using Nails or Screws at Regular Intervals

Image of a man wearing work gloves and using a caulking gun to apply weatherstripping to the sides of a garage door.

Now that you have your weatherstripping ready, it’s time to attach it to the sides of your garage door. Start by positioning one end of the weatherstripping at the top corner of one side and secure it with either nails or screws.

Make sure to leave some slack in the strip so that it can move freely when opening and closing the door.

Continue attaching the weatherstripping along the entire length of each side, placing nails or screws at regular intervals.

Ensure a Tight Seal by Pressing Down Firmly Along the Entire Length of The Strip

Once all sides are secured with weatherstripping, it’s crucial to ensure a tight seal. To do this, go along each side and press down firmly along the entire length of the strip.

This will help create a snug fit between the weatherstripping and the door frame, preventing any air leaks or unwanted intrusions.

Trim Any Excess Material for a Neat Finish

After pressing down firmly on all sides, you may notice some excess material sticking out from under or above your weatherstripping.

To achieve a neat finish and avoid any obstructions when opening or closing your garage door, trim off any excess material using a utility knife or scissors. Be careful not to cut into the weatherstripping itself, as this could compromise its effectiveness.

By following these steps, you can effectively seal your garage door on the sides and enjoy a more comfortable and energy-efficient space.

Remember to regularly inspect your weatherstripping for any signs of wear and tear, and replace it as needed to maintain its effectiveness.

Sealing your garage door on the sides is a relatively simple task that can make a significant difference in maintaining temperature control, reducing energy costs, and keeping pests at bay. So go ahead and give it a try!

Fixing Gaps on the Sides of a Garage Door

If you’ve noticed gaps on the sides of your garage door, don’t fret! It’s a common issue that can be easily fixed.

Identifying Common Causes of Gaps in Garage Doors

Before diving into the solutions, it’s important to understand why these gaps occur in the first place. There are several reasons why you may be experiencing gaps on the sides of your garage door:

  • Track misalignment: Over time, the vertical alignment of your garage door tracks can shift due to regular use or even accidental bumps. This misalignment can lead to uneven spacing between the door and frame, resulting in noticeable gaps.
  • Worn-out rollers: The rollers attached to your garage door play a crucial role in maintaining proper alignment. If these rollers become damaged or worn out, they can cause the door panels to sag and create gaps along the edges.

Adjusting Track Alignment to Eliminate Gaps Between the Door and Frame

One effective solution for sealing gaps on the sides of your garage door is adjusting track alignment. Here’s how you can do it:

  1. Inspect the tracks: Examine both vertical tracks on either side of your garage door for any signs of damage or misalignment.
  2. Loosen mounting brackets: Use a wrench or socket set to loosen the bolts holding the mounting brackets in place.
  3. Align tracks: Gently tap each track with a rubber mallet until they are perfectly straight and aligned with each other.
  4. Tighten mounting brackets: Once you have aligned the tracks, tighten all bolts securely using your wrench or socket set.

Replacing Damaged or Worn-Out Rollers

Another common cause of gaps between garage door panels is worn-out rollers. To fix this issue, follow these steps:

  1. Close the garage door: Make sure the door is fully closed before proceeding.
  2. Disconnect the opener: Unplug the power to your garage door opener to prevent any accidents while working on it.
  3. Remove old rollers: Use a wrench or socket set to remove the bolts securing the damaged rollers. Slide them out of their brackets.
  4. Install new rollers: Insert the new rollers into their respective brackets and secure them with bolts.
  5. Test the door: After replacing all the worn-out rollers, open and close your garage door several times to ensure smooth operation without any noticeable gaps.

Adding Additional Bracing or Reinforcement

In some cases, gaps may occur due to panel sagging caused by insufficient support.

Using Adhesive Instead of Nails/Screws

Using adhesive can be a convenient alternative to nails or screws. Not only does adhesive provide a strong bond, but it also eliminates the need for drilling holes in your garage door.

Let’s explore the benefits of using adhesive and learn how to properly apply it for long-lasting results.

Benefits of Using Adhesive for Attaching Weatherstripping

  1. Convenience: Unlike nails or screws, adhesive allows for quick and easy installation without the need for additional tools. You can simply apply the adhesive directly onto the weatherstripping and press it firmly against the garage door.
  2. Aesthetics: Adhesive provides a seamless finish as there are no visible nail or screw heads protruding from the weatherstripping. This clean look enhances the overall appearance of your garage door.
  3. Reduced Risk of Damage: By avoiding nails or screws, you minimize the risk of damaging your garage door during installation. Adhesive provides a secure attachment without compromising the integrity of your door.

Choosing an Appropriate Adhesive Based on Your Specific Needs

When selecting an adhesive for attaching weatherstripping to your garage door, consider factors such as material compatibility and durability. Here are some options to consider:

  1. Weatherproof Construction Adhesive: This type of adhesive is specifically designed to withstand outdoor conditions, making it ideal for sealing gaps on a garage door exposed to varying temperatures and moisture levels.
  2. Silicone-Based Adhesive: Silicone-based adhesives offer excellent flexibility and resistance to extreme temperatures, ensuring that your weatherstripping stays securely in place even during temperature fluctuations.
  3. Polyurethane Construction Adhesive: Known for its strong bonding capabilities, polyurethane construction adhesive provides reliable adhesion between different materials, including wood and metal.

Proper Application Techniques to Ensure Long-Lasting Adhesion

Image of a man using a cleaning cloth to wipe down the sides of a garage door, removing dirt and grime.

To ensure that the adhesive creates a strong and lasting bond between the weatherstripping and your garage door, follow these steps:

  1. Clean the Surface: Before applying adhesive, clean the surface of your garage door thoroughly to remove any dirt, dust, or grease. A clean surface will promote better adhesion.
  2. Measure and Cut Weatherstripping: Measure the length of each side of your garage door where you want to install weatherstripping. Cut the weatherstripping into appropriate-sized pieces using a utility knife or scissors.
  3. Apply Adhesive: Apply a thin line of adhesive along one side of the weatherstripping, making sure to cover the entire length.

Installing a Garage Door Threshold Seal and Replacing Weatherstripping

These two steps are crucial for keeping your garage protected from the elements and ensuring energy efficiency.

Understanding the Purpose and Benefits of a Threshold Seal

A garage door threshold seal is a strip of material that is placed along the bottom edge of your garage door, creating a barrier against drafts, pests, dirt, and water. It acts as an additional layer of protection to prevent these elements from entering your garage.

Key points:

  • Prevents drafts, pests, dirt, and water from entering the garage
  • Enhances energy efficiency by reducing air leakage
  • Protects belongings stored in the garage from moisture damage

Step-by-Step Instructions for Installing a Threshold Seal

To install a garage door threshold seal effectively, follow these simple steps:

  1. Measure: Start by measuring the width of your garage door opening. This will help you determine the length of the threshold seal needed.
  2. Clean: Thoroughly clean the bottom edge of your garage door to ensure proper adhesion. Remove any debris or old adhesive residue.
  3. Cut: Using scissors or a utility knife, cut the threshold seal to match the width of your garage door opening.
  4. Position: Place one end of the threshold seal against one side of the opening and slowly unroll it along the bottom edge until you reach the other side.
  5. Adhere: Peel off the backing tape on one side of the threshold seal and press it firmly onto the cleaned surface at one end. Slowly work your way across, peeling off more backing tape as you go and pressing down firmly to ensure good adhesion.
  6. Trim (if necessary): If there is any excess length at either end of the threshold seal, use scissors or a utility knife to trim it to fit perfectly.
  7. Test: Open and close your garage door several times to ensure that it moves smoothly over the threshold seal without any obstruction.

Pro tip: It’s recommended to install the threshold seal on a warm day, as the adhesive will adhere better in warmer temperatures.

Removing Old, Worn-Out Weatherstripping Before Installation

Before installing a new threshold seal, it’s essential to remove any old, worn-out weatherstripping that may be present. This will ensure a clean surface for proper adhesion of the new seal.

Key points:

  • Inspect the existing weatherstripping for signs of wear and tear.

Caulking the gaps for effective sealing

To ensure that your garage door is properly sealed on the sides, one effective method is to use caulk.

Caulk is a sealant that can fill in gaps and cracks, preventing unwanted pests, water, cold air, dirt, and other elements from entering your garage. Let’s explore how to effectively seal a garage door using caulk.

Types of caulk suitable for filling gaps around garage doors

There are a few options to consider. Here are some common types of caulk that work well for this purpose:

  • Silicone caulk: Known for its durability and flexibility, silicone caulk is an excellent choice for sealing larger gaps or joints.
  • Acrylic latex caulk: This type of caulk is easy to apply and clean up. It works best for smaller cracks and gaps.
  • Polyurethane-based caulks: These caulks provide excellent adhesion and flexibility. They are ideal for sealing wider gaps and areas with movement.

Preparing surfaces before applying caulk

Before you start applying the caulk, it’s essential to prepare the surfaces properly. Here’s what you need to do:

  • Clean the area: Remove any dirt, dust, or debris from the surfaces where you plan to apply the caulk. Use a brush or vacuum cleaner to ensure a clean surface.
  • Remove old caulking: If there’s existing caulking that has deteriorated or cracked, remove it using a putty knife or scraper.
  • Fill larger gaps: For wider gaps or holes in the molding or trim around your garage door, consider using foam backer rods as fillers before applying the caulk.

Applying caulk in a continuous, even bead for optimal sealing

Image of a man wearing work gloves and using a caulking gun to seal the edges of a garage door.

Now that you’ve prepared the surfaces let’s move on to applying the caulk. Follow these steps for optimal sealing:

  1. Load the caulk gun: Insert the tube of caulk into the caulk gun and cut off the tip at a 45-degree angle.
  2. Begin at one end: Start at one corner or edge of the garage door and apply a continuous bead of caulk along the gap, moving in a steady motion.
  3. Maintain even pressure: Squeeze the trigger on the caulk gun with consistent pressure to ensure an even flow of caulk.
  4. Smooth it out: Use your finger or a caulking tool to smooth out the applied caulk, ensuring it fills in all gaps completely.

Achieving Effective Side Sealing

To ensure that your garage door is properly sealed on the sides, there are a few key steps you can take. Let’s dive in and explore how to achieve effective side sealing for your garage door.

Regular Inspection and Maintenance of Weatherstripping

One of the most crucial aspects of achieving effective side sealing is regularly inspecting and maintaining the weatherstripping on your garage door.

Over time, weatherstripping can become worn or damaged, compromising its ability to create a tight seal. By inspecting it periodically, you can identify any issues and address them promptly.

Adjusting or Replacing Weatherstripping as Needed

If you notice that the weatherstripping on your garage door is damaged or no longer provides an adequate seal, it may be necessary to adjust or replace it. This process involves removing the old weatherstripping and installing new seals that are in good condition.

You’ll want to ensure that the new seals are the right length for your specific garage door and position them correctly along the sides.

Ensuring Proper Alignment of Garage Door Panels

Another factor that can affect side sealing is the alignment of your garage door panels. If they are not properly aligned, gaps may form between them, allowing air drafts to enter.

To address this issue, it’s important to check the alignment of your garage door panels regularly and make any necessary adjustments. This will help ensure a tight fit when the door is closed.

Addressing Any Underlying Issues

In some cases, poor side sealing could be indicative of underlying issues with your garage door system. For example, if there are gaps at the bottom edge of your garage door when closed, it could be due to a misaligned threshold seal or worn-out bottom seal.

Identifying and addressing these underlying issues will contribute to achieving effective side sealing.

Having the right tools is essential:

  • Utility knife: A utility knife will be handy for removing old weatherstripping and cutting new seals to the required length.
  • Screwdriver: You may need a screwdriver to adjust the alignment of your garage door panels.
  • Measuring tape: To ensure accuracy when installing new weatherstripping, a measuring tape can help you determine the correct length.

By following these steps and using the right tools, you can effectively seal your garage door on the sides.

Remember, if you’re unsure about any aspect of this process or prefer professional assistance, don’t hesitate to reach out to a garage door specialist who can provide expert guidance.

Now that we’ve covered achieving effective side sealing, let’s move on to exploring other essential aspects of maintaining a well-sealed garage door.

Utilizing a Garage Door Threshold Seal and Bottom Seal Combination

Installing a garage door threshold seal and bottom seal combination can provide numerous benefits for your garage.

By effectively sealing the sides of your garage door, you can prevent water, dirt, and pests from entering while also reducing drafts and improving insulation.

Benefits of Using Both Threshold Seal and Bottom Seal Together

Utilizing both a threshold seal and a bottom seal is highly recommended. Here’s why:

  • Enhanced Protection: The combination of these two seals creates a comprehensive barrier against external elements such as rainwater, dust, leaves, and pests. This ensures that your garage remains clean and free from unwanted intruders.
  • Improved Energy Efficiency: The joint effort of the threshold seal and bottom seal helps minimise drafts that can enter through gaps around the sides of the garage door. This leads to better insulation, keeping your garage at an optimal temperature throughout the year.
  • Reduced Maintenance: By preventing water from seeping into your garage, you can avoid potential damage to stored items or flooring. With fewer drafts entering the space, there is less strain on heating or cooling systems.

How Threshold Seals Prevent Water, Dirt, and Pests from Entering the Garage

Threshold seals are designed to create a tight barrier between the bottom edge of your garage door and the floor. Here’s how they work:

  1. Measure: Begin by measuring the width of your garage door opening to determine the appropriate size for your threshold seal.
  2. Clean: Thoroughly clean the area where you will be installing the threshold seal. Remove any debris or obstructions that may hinder proper adhesion.
  3. Apply Adhesive: Apply a generous amount of adhesive to the underside of the threshold seal, ensuring even coverage.
  4. Position and Press: Carefully position the threshold seal at the bottom of the garage door opening and press it firmly into place. Make sure it is aligned properly.
  5. Secure and Trim: Use screws or nails to secure the threshold seal in place, following the manufacturer’s instructions. Trim any excess length if necessary.

Benefits of Bottom Seals for Draft Reduction and Insulation Improvement

Bottom seals, also known as door bottom seals or astragal seals, play a crucial role in reducing drafts and improving insulation for your garage door.

By creating a tight seal along the bottom edge of the door, these seals prevent cold air from entering and warm air from escaping, making your garage more comfortable and energy-efficient.

Here’s why bottom seals are essential for draft reduction and insulation improvement:

Enhanced Energy Efficiency

  • Bottom seals effectively block drafts, preventing the entry of cold air into your garage and the escape of warm air. This helps maintain a consistent temperature inside, reducing the need for excessive heating in winter and cooling in summer.
  • By minimizing temperature fluctuations, bottom seals contribute to energy savings, resulting in lower utility bills and a reduced carbon footprint.

Improved Comfort

  • Drafts can create uncomfortable cold spots near the garage door, making it unpleasant to spend time in the space. Bottom seals eliminate these drafts, ensuring a more comfortable environment for various activities like DIY projects, hobbies, or parking your car.
  • With better insulation, bottom seals also help to regulate humidity levels, preventing excess moisture from entering your garage. This can help protect your belongings from damage caused by dampness or condensation.

Enhanced Protection

  • Bottom seals act as a barrier against external elements such as dust, debris, and pests. They help keep your garage clean and free from unwanted critters, ensuring a more hygienic and organized space.
  • By preventing drafts, bottom seals also help protect your stored items from temperature-sensitive damage. This is particularly important if you store items such as paint, electronics, or delicate materials in your garage.

Easy Installation and Maintenance

  • Installing bottom seals is a simple process that can be done by homeowners with basic DIY skills. They are available in various types, including adhesive seals, threshold seals, and weatherstripping, allowing you to choose the option that best suits your garage door.
  • Maintenance is minimal, typically requiring periodic cleaning to remove dirt or debris that may accumulate on the seal. Regular inspection ensures the seal remains intact and in good condition.


Can I use silicone caulk instead of adhesive?

Yes, silicone caulk can be an effective alternative to adhesive when sealing gaps on the sides of a garage door. It provides a strong bond and creates a waterproof barrier.

How often should I replace my weatherstripping?

Weatherstripping should be replaced every 2-3 years or as soon as signs of wear and tear are visible. Regular inspection is key to maintaining an effective seal.

Is it necessary to install both a threshold seal and a bottom seal?

While it’s not mandatory, installing both a threshold seal and bottom seal offers maximum protection against drafts, pests, and moisture infiltration. It provides comprehensive sealing for optimal results.

Can I hire a professional to seal my garage door?

Absolutely! If you’re unsure about tackling this project yourself or want expert advice, hiring a professional can ensure proper installation and long-lasting results.

Are there any specific safety precautions I should follow during this process?

Yes, safety should always be a priority. Remember to wear protective gear such as gloves and goggles when handling tools or working with adhesives. Ensure the garage door is properly supported and secured before starting any sealing work.

Conclusion: Achieving Effective Side Sealing for Your Garage Door

Congratulations! You’re now equipped with the knowledge and steps to effectively seal the sides of your garage door. By following the methods outlined in this blog post, you can ensure that your garage remains well-insulated, protected from the elements, and free from pests and debris.

Taking the time to properly weather-seal your garage door will not only enhance its functionality but also contribute to energy savings and a more comfortable environment inside.

Now that you know how to seal a garage door on the sides, it’s time to take action. Don’t let those annoying drafts or pesky critters invade your space any longer.

Grab your tools and get started on weatherproofing your garage door today. Remember, a well-sealed garage door is like armour for your home – providing protection and peace of mind.