Replacement glass (cut to size), glazing compound (putty) or silicone sealant, and new glazing points or clips.
If your window is simply cracked—not shattered—you can sometimes avoid replacement. For small cracks, clean the glass, apply clear nail polish or specialized glass repair resin, and scrape off excess. But if the crack spans more than a few inches, or the glass is missing pieces, replacement is the only durable fix.
Fixing a broken window pane is satisfyingly straightforward. It saves money, keeps the weather out, and gives you that small-but-mighty feeling of having mended something with your own hands. Just remember: measure twice, wear gloves, and let the putty cure. Your window—and your heating bill—will thank you.
