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How to Replace Window Glass

If you find yourself staring at a cracked or shattered window—don’t panic.

Window glass replacement might seem daunting, but with extra caution and expert tips, you can tackle this DIY project like a pro. Whether it’s a minor crack or a complete break, we’ll guide you through the steps to restore your window to its former glory. So, roll up your sleeves, and let’s get started!

Why You Might Need to Replace Window Glass

Before diving into the nitty-gritty, let’s take a moment to consider why you might need to replace window glass in the first place. Perhaps a rogue cricket ball has made an unexpected entrance, or maybe the wear and tear of time has taken its toll. Whatever the reason, replacing window glass can improve your home’s aesthetics, enhance energy efficiency, and keep you safe from the elements—as such, it’s important to replace damaged glass as soon as possible. 

How to Replace Window Glass: A Step-by-Step Guide

Step 1: Gather Your Tools and Materials

Before you start, gather all the necessary tools and materials. Here’s what you’ll need:

Tools:

  • Safety goggles
  • Work gloves
  • Putty knife
  • Glass cutter
  • Measuring tape
  • Hammer
  • Chisel
  • Pliers
  • Caulking gun

Materials:

  • Replacement glass (cut to size)
  • Glazing putty or silicone sealant
  • Glazing points (if applicable)
  • Paint (optional, for finishing touches)

With your toolkit assembled, you’re ready to embark on your window glass replacement project. 

a flatlay of materials and toola used for window glass replacement

Step 2: Safety First!

Before you begin, keep in mind that safety should always be your top priority. Remember, a safe DIYer is a happy DIYer!

  • Wear Safety Goggles: Protect your eyes from glass shards and debris.
  • Use Work Gloves: Shield your hands from sharp edges and splinters.
  • Clear the Area: Ensure the workspace is free from clutter and tripping hazards.
  • Work on a Stable Surface: Use a sturdy ladder or step stool if working at height.
  • Working from Heights: Ensure you have a stable ladder and someone to assist you if needed, if possible. 
  • Handle Glass with Care: Always carry glass vertically to prevent breakage.
  • Dispose of Broken Glass Properly: Use a sturdy container to avoid accidents.
  • Keep a First Aid Kit Nearby: Be prepared for minor cuts or injuries.

Step 3: Remove the Old Glass

Carefully remove the old glass from the window frame. Use your putty knife to pry away any glazing putty or sealant holding the glass in place. If there are any glazing points (small metal clips), use your pliers to remove them. Take your time with this step, as you want to avoid damaging the window frame.

Once you’ve removed the old glass, clean the frame thoroughly, removing any remnants of putty or debris. A clean surface will ensure a better seal for your new glass.

Step 4: Measure and Cut the New Glass

Next up, it’s time to measure and cut your new glass. Measure the height and width of the window opening, and subtract a few millimetres to allow for expansion and contraction. If you’re not comfortable cutting glass yourself, many hardware stores offer cutting services. Just provide them with your measurements, and they’ll have you sorted in no time. 

a person cutting glass for a window glass replacement project

Step 5: Prepare the Frame for the New Glass

Once you have your new glass ready, it’s time to prepare the frame. Apply a thin layer of glazing putty or silicone sealant along the frame where the glass will sit. This will create a watertight seal and help hold the glass in place.

Step 6: Install the New Glass

Carefully place the new glass into the frame, ensuring it fits snugly. If you’re using glazing points, now’s the time to insert them to secure the glass. Gently press the points into the frame, making sure they’re evenly spaced around the glass.

After securing the glass, apply another layer of glazing putty or sealant around the edges. Smooth it out with your putty knife for a clean finish. If you’re feeling artistic, you can even paint the putty to match your window frame once it’s dry.

Step 7: Finishing Touches

With the new glass installed and sealed, it’s time to step back and admire your handiwork. Allow the putty or sealant to cure as per the manufacturer’s instructions. This may take a few days, so be patient. Once cured, you can clean the glass and frame for a sparkling finish.

Step 8: Regular Maintenance

Congratulations! You’ve successfully replaced your window glass. To keep your windows in tip-top shape, perform regular maintenance checks. Clean the glass regularly, inspect for any signs of wear, and ensure the seals remain intact. A little TLC goes a long way in extending the life of your windows.

a beachside home with new window glass replacements

Take a DIY Detour: Choose the Kandus Glass Road for Optimal Solutions

While replacing window glass can be a rewarding DIY project, sometimes it’s best to leave it to the experts for elevated convenience and peace of mind. If you’re searching for high-quality glass solutions, look no further than Kandus Glass—a trusted company that’s proudly been serving the Eastern suburbs of Melbourne since 2008.

Our team of professionals is ready to assist you with everything from glass replacement to custom solutions for your home or business. Here’s why we’re the go-to choice in the community: 

Skilled Professionals: Our certified experts employ cutting-edge tools and methods to ensure top-notch repairs.

Swift and Dependable: We value your time, providing prompt and efficient services to restore your windows in no time.

Budget-Friendly: Exceptional service shouldn’t be costly. Our competitive rates are designed to suit your budget.

Commitment to Excellence: Your satisfaction is our main goal. We aim to surpass your expectations with every repair we undertake.

Contact us today to get started. 

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Matej Kandus

Matej Kandus is a fully qualified glazier with over 15 years of experience serving Melbourne’s Eastern suburbs. Through his business, Kandus Glass, he provides expert glazing solutions for homes, businesses, and builders — from custom splashbacks and frameless shower screens to repairs and shopfront replacements.