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How To Fix a Cracked Window in 8 Quick Steps

A cracked window can be a pesky problem for homeowners, allowing drafts, compromising insulation, and detracting from the aesthetics of…
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Jacob Wadding

A cracked window can be a pesky problem for homeowners, allowing drafts, compromising insulation, and detracting from the aesthetics of your home. However, fixing a cracked window is a manageable DIY project that can save you money on professional repairs. In this homeowner’s guide, we’ll walk you through the steps to fix a cracked window quickly and efficiently. Get ready to restore your window’s functionality and curb appeal!

Inside this blog:

  • The 8 easy steps fix your cracked window
  • Extra tips + tricks to ensure a successful window repair

Keep reading to learn how to repair your cracked window like a real pro!

🧰 Tools You’ll Need 🧰

Before diving into the repair process for how to fix window glass cracks, gather the necessary tools and materials. Here’s a checklist to help you get started:

  • Safety glasses and gloves
  • Screwdriver and a putty knife
  • Utility knife or glass cutter
  • Glazing compound or window putty
  • Painter’s tape, paint and primer (if needed)
  • Replacement glass or acrylic sheet
  • Measuring tape and sandpaper
  • Paintbrush

Now that you know exactly what you need to fix cracked glass, let’s get to how to fix your cracked window in 8 easy steps!

1. Prioritize Your Safety

Safety should always be your top priority when working with glass. Put on safety glasses and gloves to protect your eyes and hands from potential glass shards during the repair. Additionally, consider using a dust mask to avoid inhaling any fine glass particles that may be present during the repair.

2. Remove Broken Glass

Using a screwdriver, carefully remove any loose or broken glass pieces from the window frame. Be gentle to avoid causing further damage, and use a small broom or vacuum cleaner with a nozzle attachment to clean up any glass fragments from the surrounding area.

3. Measure and Prepare


Measure the dimensions of the opening where the glass or acrylic sheet will fit. Take accurate measurements to ensure a proper fit for the replacement material. Double-check your measurements to avoid errors that could lead to an ill-fitting replacement.

4. Cut Replacement Material

Using a utility knife or glass cutter, cut the replacement glass or acrylic sheet to match the measurements from Step 3. Make clean and precise cuts to achieve a snug fit. It’s essential to use a straightedge or guide to ensure straight and accurate cuts.

5. Apply Glazing Compound

Lay a thin bead of glazing compound or window putty along the edges of the window frame where the replacement glass will sit. Ensure the putty is evenly applied and covers the entire frame. Properly applied putty creates an effective seal and prevents drafts and water infiltration.

6. Insert Replacement Material

Gently place the cut replacement glass or acrylic sheet into the frame. Press it firmly against the glazing compound to create a secure seal. Pay close attention to aligning the edges of the replacement material with the frame to ensure a flush fit. Wipe away any excess putty that squeezes out from the edges with a putty knife or a damp cloth.

7. Secure and Paint (if needed)

Use painter’s tape to hold the replacement material in place while the glazing compound sets. Allow the compound to dry according to the manufacturer’s instructions, which typically involve a curing period. If your window requires painting, apply primer and paint to match the window’s appearance, ensuring it blends seamlessly with the rest of the window frame.

8. Clean Up and Final Touches


Once the glazing compound is completely dry, remove the painter’s tape and clean up any excess putty or paint. Use sandpaper to smooth any rough edges if necessary. Take a final look at your repaired window to ensure it is securely sealed and aesthetically pleasing

Additional Tips and Considerations 🪟

Below we cover some tips for how to ensure you fix your cracked window like a true pro.

Type of Glass

Depending on the location and purpose of the window, you may choose either glass or acrylic for the replacement. Acrylic is shatter-resistant and often preferred for safety. It’s an excellent choice for windows in high-traffic areas or homes with children and pets due to its durability and resistance to breakage.

Paint Matching

If you need to paint the window frame, ensure you choose a paint color that matches the existing frame to maintain a cohesive look. A well-matched paint job will seamlessly blend the repaired window with the rest of your home’s exterior or interior decor.

Multiple Cracks

For windows with multiple cracks or extensive damage, consider consulting a professional for repair or replacement. Repairing multiple cracks can become complex, and a professional can assess the overall condition of the window and recommend the best course of action.

Preventive Measures

To avoid future cracks, inspect and maintain your windows regularly. Address any issues promptly to prevent further damage. Regular maintenance can include checking for loose or damaged window putty, sealing any gaps or cracks, and cleaning the glass to prevent deterioration.

Window Pane Replacement

In cases where the entire window pane is damaged, you may need to replace the entire window. Consult a professional for this type of repair. Replacing a window pane can be a more intricate task, and a professional can ensure the new window fits correctly and is properly sealed to prevent drafts and water leaks.

Say Goodbye to Cracked Windows 🛠️

Fixing a cracked window is a satisfying DIY project that can improve your home’s comfort and appearance. By following these eight quick steps and taking the necessary safety precautions, you can successfully repair a cracked window on your own. Remember to choose the appropriate replacement material and paint if needed, and don’t forget to inspect your windows regularly to catch any issues before they become major problems. 

Contact Arch Exteriors today to get in touch with our expert team of contractors. With our top tier craftsmanship and dedicated customer service, we guarantee you’ll be thrilled with the final product. Let’s get started on your next home improvement project today!

About the Author
Your home is probably the most expensive thing you own. When you hire somebody to make improvements, you want high-quality work. In addition, you hope they’ll take the same care you would. You want someone with a good reputation, legitimate credentials, well established, using quality materials, and who charges a fair price. For over 11 years, I have worked hard to provide all of those benefits to my clients. One of the major reasons we have been able to do that is our ability to keep highly qualified personnel. Our workers are well trained, properly motivated, and managed professionally. I make certain that I convey measurable systems and procedures that our team understands and can readily follow.

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