How to Replace Garage Window Glass

Replacing the glass on your garage window can be a great way to improve its overall appearance and add a layer of security.

How to Replace Garage Window Glass

Window glass that is cracked or broken needs to be replaced for safety and aesthetic reasons. Replacing the glass in your garage window may seem intimidating initially, but it’s a pretty straightforward process.

Replacing garage window glass offers a number of benefits. First, it can help improve the security of your home by providing an additional layer between the exterior and interior. This can also reduce noise and make it easier to keep out pests.

Additionally, replacing the window glass helps reduce energy costs as well since new, insulated windows are more efficient than older models. In this blog post, You will learn in detail how to replace garage window glass.

Tools You Will Need

  • Hammer
  • Screwdrivers (both Phillips and flathead)
  • Pry bar or crowbar
  • Utility knife
  • Glass cutters
  • Caulking gun
  • Glazier’s points
  • Putty knife
  • Safety glasses
  • Work gloves

Once you have all these tools, you can begin the replacement process.

Step-by-Step Processes for How to Replace Garage Window Glass

Step 1: Inspect the Window Frames

Inspect the Window Frames

Before you begin, take the time to inspect the window frames carefully. Make sure that the frame has no rot or damage and is in good condition overall.

Using a measuring tape, measure the length and width of your old garage window glass and make a note of these measurements so that you can purchase replacement glass accordingly.

Step 2: Purchase Replacement Glass

Once you have taken the necessary measurements, purchase replacement glass that is the same size as your original window glass. Make sure to buy safety glass if you are replacing a window in a higher-up location or near children’s play areas.

Step 3: Remove the Old Glass

Before you can install the new glass, remove the old glass. This will require a putty knife to pry off any nails or staples that are holding the pane in place. Once all of the old glass has been removed, use a damp cloth to clean up around the window frame and remove any remaining debris.

Step 4: Install Insulating Foam Tape

Before you can place the new window glass, ensure that the frame is properly insulated by installing insulating foam tape around the edges. Next, carefully place the new glass into the window frame and use a putty knife to press it into the tape gently.

Step 5: Secure with Nails or Staples

Use Nails or Staples

Once the glass is securely in place, use nails or staples to firmly secure it. Make sure that they are evenly spaced and not too close to the edge of the window frame. To prevent any drafts or moisture from entering the window frame, apply a bead of caulk around the edges of the glass.

Once you have completed all these steps, you can now sit back and enjoy your newly replaced garage window glass! It should provide you with a beautiful view to look out onto and will add to the overall energy efficiency of your home.

Safety Tips for How to Replace Garage Window Glass

  1. Make sure to wear protective gear such as gloves, goggles, dust masks, and a hard hat when replacing glass in your garage window.
  2. Check that the area is well-ventilated before beginning any work with potential airborne hazards or debris.
  3. Properly secure ladders or other equipment used to access the window.
  4. Remove any broken glass pieces before installing the new window glass to prevent further injury or damage from occurring.
  5. Make sure that the new window glass is the same size and shape as the old one in order to fit properly in the space.
  6. Securely fasten the new window glass using putty, caulk, or other suitable materials.
  7. Check the window for any cracks, gaps, or imperfections and make necessary repairs before finishing the job.

By following these safety tips, you can ensure that your garage window glass is properly replaced with minimal risk of injury or damage to yourself or your home.

Is It Necessary to Have a Professional Install New Garage Window Glass? 

Replacing garage window glass can be a daunting task for a novice DIYer. Understanding the process and taking safety precautions before attempting the job on your own is important.

Doing so will help ensure that you are successful in replacing your window glass safely and effectively. In some cases, it may be necessary to hire a professional to complete the job, depending on the size and shape of the window.

Hire a Professional

When replacing garage window glass, measuring the area where the new window glass will be installed is important. This step should not be neglected as improperly measuring can lead to an inaccurate fit for your replacement window.

If you are unsure how to proceed with this step, it may be best to hire a professional who will be able to measure and install the new window accurately.

What is the Best Way to Seal Around the Edges of Your New Garage Window Glass? 

It comes to replacing garage window glass, proper sealing is key. To ensure that your new window glass is secure, you use a high-quality sealant or caulking around the edges of the frame.

The type of sealant you choose may vary based on the material for your garage window frame; silicon caulk is best for wood frames, while polyurethane caulk is preferable for metal frames. Be sure to follow the instructions on your product before you begin caulking.

Before applying the sealant, it’s important to clean around the edges of the frame. Remove all the dirt, dust, and debris that could interfere with the sealant’s ability to form a strong bond. Allow the frame to dry completely before moving on.

To apply your sealant, use a caulk gun with a steady hand and even pressure. It is important to not leave any gaps in the caulking around the window glass as these may allow drafts or insects into your garage.

Apply Your Sealant

What Maintenance is Required to Ensure the Longevity of Your New Garage Window Glass? 

Proper maintenance is essential to ensure the longevity of your new garage window glass. To protect your investment, here are some tips to keep in mind:

  • Clean Regularly: Dust and dirt can build up on the glass over time, which can cause scratches or other damage. Wipe away any dust with a damp cloth and mild cleaner to keep the glass looking its best. 
  • Check for Damage: Inspect your new window regularly to ensure that no cracks or chips have developed in the glass. If you notice any, contact a professional as soon as possible to repair them before they become worse.
  • Take Care When Opening and Closing: To avoid scratches or chips, open and close your garage window carefully and slowly. Be wary of sharp objects or tools that may come into contact with the glass when opening or closing the window.
  • Keep an Eye on Temperature Changes: If you live in a climate where temperatures fluctuate drastically throughout the year, keep an eye on your window to ensure the glass isn’t expanding or contracting too much. If you notice any warping or cracking, contact a professional for help.

Following these tips will ensure that your new garage window glass has a long life and stays looking great for years to come.

Where Can You Find More Information or Help With How to Replace Garage Window Glass?

If you’re looking for more information or help with replacing garage window glass, a few options are available. First and foremost, you can look up the specific manufacturer of your garage door or windows to get detailed instructions on replacing the glass.

Most manufacturers have a website or phone number to call for help. If you do not have that information handy, your local home improvement store may be able to provide it or point you in the right direction.

You can also look up tutorials on YouTube and other sites for step-by-step instructions on window glass replacement. Many of these videos are extremely helpful and offer detailed instructions on the process.

In addition, your local home improvement store may offer classes on window glass replacement. You can check with your local store to see if they have any courses that you can attend to learn how to do the job yourself. Finally, you can always hire a professional to replace the garage window glass for you.


In conclusion, replacing garage window glass is a relatively simple process and can easily be completed by the average homeowner. While it may require some technical knowledge, most of the steps are straightforward. It is also a cost-effective way to improve the look and security of your garage. 

Before embarking on this project, however, make sure to consult with an expert if you have any doubts or questions. This will ensure that you complete the job correctly and adhere to safety protocols.

I hope this article has been beneficial in learning how to replace garage window glass. Make Sure the precautionary measures are followed chronologically. 

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Rick Kelly

I am Rick. I grew up helping my dad with his handyman service. I learned a lot from him about how to fix things, and also about how to work hard and take care of business. These days, I'm still into fixing things- only now, I'm doing it for a living. I'm always looking for new ways to help people grow and develop. That's why I have created this blog to share all my experience and knowledge so that I can help people who are interested in DIY repair.

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