If the problem with your window is limited to a cracked or broken pane of glass, you may be able to repair just the sash rather than replacing the entire window. Replacing the glass in a sash window can be a manageable DIY project, saving you the cost of a full window replacement. However, more extensive damage to the sash or frame may require a professional window repair service. Let’s explore the steps to repair a cracked or broken window sash.
Assessing the Damage
The first step is to carefully inspect the window sash to determine the extent of the damage. If the glass is the only issue, with no other structural problems, you can likely proceed with a DIY glass replacement. However, if the sash itself is warped, cracked, or otherwise damaged, you may need to replace the entire sash or even the entire window.
Look for signs of damage beyond just the cracked or broken glass, such as: – Cracks or splits in the sash frame – Loose or missing hardware – Deterioration of the sash materials (wood, vinyl, etc.) – Issues with the window’s operation, like sticking or binding
If the sash appears to be in good condition aside from the glass, you can move forward with a DIY glass replacement. But if there are any structural concerns, it’s best to consult a professional window repair service to ensure the job is done properly and safely.
Removing the Old Glass
Once you’ve determined that a DIY glass replacement is feasible, the next step is to carefully remove the old, broken glass. This process requires patience and a steady hand to avoid further damage to the sash.
Start by using a utility knife or multi-tool to score the existing putty around the perimeter of the glass. This will help loosen the seal and make the glass easier to remove. Then, use a putty knife or chisel to gently pry the glass out of the sash. Be careful not to apply too much force, as this could crack the sash frame.
If the glass is completely shattered, you may need to use a shop vacuum or other tool to carefully remove all the glass fragments from the sash. Dispose of the broken glass safely, and thoroughly clean the sash to prepare for the new glass.
Measuring and Cutting the New Glass
Once the old glass is removed, measure the opening in the sash to determine the size of the replacement glass. It’s important to measure accurately, as the new glass needs to fit snugly into the sash without being too large or too small.
Take the measurements to a local glass supplier or hardware store and have them cut a new pane of glass to the exact size you need. Double-check the measurements before the glass is cut to ensure a perfect fit.
If you’re comfortable with the process, you can also cut the glass yourself using a glass cutter and a straight edge. This can save you a bit of money, but requires more skill and care to avoid cracking the glass.
Installing the New Glass
With the new glass cut to size, it’s time to install it into the sash. Start by applying a bead of glazing putty or sealant around the perimeter of the sash opening. This will help hold the glass in place and create a weathertight seal.
Carefully lower the new glass into the sash, pressing it firmly into the putty. Use glazier’s points (small metal clips) around the edges to help secure the glass in place.
Once the glass is seated, use a putty knife to apply a new bead of glazing putty around the entire perimeter of the glass. Smooth the putty with the knife to create a clean, angled edge between the glass and the sash.
Allow the putty to fully cure according to the manufacturer’s instructions, which may take several days or even weeks. During this time, avoid opening or closing the window to prevent disturbing the new seal.
Finishing Touches
After the putty has cured, you can paint the new putty to match the existing sash color. This will help the repair blend in seamlessly with the rest of the window.
If the window has any other hardware, such as weatherstripping or pulleys, be sure to clean, lubricate, and reinstall them properly. This will ensure the window continues to operate smoothly and effectively.
With the new glass installed and the sash fully repaired, your window should be as good as new, providing a clear view and improved energy efficiency.