Before you begin, make sure to read our other articles on replacing broken window panes in steel-casement windows, sliding-sash windows, and metal storm windows for additional guidance and tips.

Step 1: Measure and Cut the Replacement Glass

To begin the process of replacing broken glass panes in wooden windows, accurately measure the grooves’ length and width where the pane will fit. Cut the new glass 1/8 inch shorter than the groove dimensions in both directions, creating a 1/16-inch gap on each side. This gap allows the glass to expand and contract with weather changes.

Step 2: Gather Your Tools and Supplies

Prepare all the necessary tools and supplies for the job, including latex glazing putty, metal glazing points, pliers, a heat gun, flexible putty knife, 1- or 2-inch stiff steel putty knife, and a flathead screwdriver.

Step 3: Remove Glass Shards Safely

Safety is of the utmost importance when dealing with broken glass. Put on safety goggles and gloves to protect your eyes and hands from potential injuries. Use pliers to carefully remove all glass shards from the window frame.

Step 4: Remove Old Putty with Heat and Patience

Use the heat gun to warm the old putty and then scrape it away with a putty knife. If the putty doesn’t lift off easily, apply more heat and try again. Be patient, as the putty around older windows can be hard as concrete but will soften with enough heat and time. Avoid chiseling out the old putty to prevent damaging the window.

Step 5: Remove Old Glazing Points

Use a putty knife or the tip of a screwdriver to remove the old glazing points, which will be buried under the old putty.

Step 6: Clean and Inspect the Rabbet Groove

Clean the rabbet groove thoroughly and inspect it to ensure that no glazing putty, glass shards, or glazing points remain.

Step 7: Apply Putty to the Groove

On the glass side of the rabbet groove, squeeze out a 1/16-inch bead of putty between the edge of the glass and the window frame.

Step 8: Embed Glass into Putty

Gently press down on the glass edges to embed the glass into the putty, allowing the putty to spread out and form a moisture seal on the inside of the window between the glass and sash.

Step 9: Position the New Pane in the Rabbets

Carefully shift the new pane until you have a 1/16-inch gap between the pane and sash on all four sides.

Step 10: Insert New Glazing Points

Place at least two new glazing points in each section of the window sash surrounding the new glass. Space the points evenly around the perimeter, approximately 6 inches apart.

Step 11: Push Glazing Points into the Wood Sash

Use the flat side of a putty knife or a screwdriver blade to push one corner of each triangular glazing point into the wood sash, securing the glass in place.

Step 12: Apply Putty to Glass Edges

Roll a glob of putty between your bare hands to form a 1/2-inch-thick rope. Press the length of this rope along all four sides of the glass, ensuring a proper seal.

Step 13: Smooth Glazing Putty and Remove Excess

Holding the putty knife at a 45-degree angle, press and smooth the glazing putty against the glass and sash. Scrape away any excess putty to ensure a clean, professional finish.

Step 14: Allow Putty to Dry and Repaint the Area

Allow the putty to dry completely before repainting the putty and the repaired area. When repainting, don’t mask off the glass. Instead, let the paint overlap about 1/8 inch onto the glass to help form a moisture seal between the glass pane and the sash.

Step 15: Clean Up and Dispose of Materials

Once the window repair is complete, clean up your work area, disposing of any broken glass, old putty, and other debris properly. Keep your tools organized and stored safely for future use.

Choose for Professional Window Repair

The window repair experts at are dedicated to delivering exceptional service and top-notch workmanship. We guarantee customer satisfaction by ensuring we complete your window repairs with the highest level of care and attention to detail, keeping your home safe from the elements.

Before attempting a DIY window repair project, consider the advantages of placing your trust in the professionals at for your home’s window needs. Not only will you save time and effort, but you’ll also enjoy peace of mind knowing that experienced professionals are handling the job.

Reach out to us today, and let our experienced team assist you in bringing your windows back to their original splendor and functionality while offering you a stress-free experience. With, you can be confident that your home’s windows are in good hands.