How To Fix Broken Window Pane [patched]

Replacement glass (cut to size), glazing compound (putty) or silicone sealant, and new glazing points or clips.

Take a golf-ball-sized lump of glazing compound and knead it until soft and pliable. Roll it into a long rope (about ½ inch thick). Press this rope firmly around the glass-to-frame joint at a 45-degree angle. Then, using a putty knife, smooth the putty into a neat, sloped bead that overlaps the glass by about 1/8 inch and the frame by ¼ inch. Wipe away excess. how to fix broken window pane

Allow the putty to cure for 7–14 days (check the manufacturer’s instructions). Do not paint immediately—most glazing compounds need to form a skin first. Once cured, paint over the putty and frame edge with exterior primer and paint. This seals the wood and protects the putty from weather. Replacement glass (cut to size), glazing compound (putty)

These video guides offer visual demonstrations for different types of window frames, including wood and aluminum, to help you master the repair process: How to Replace a Broken Window Pane | Ask This Old House This Old House Press this rope firmly around the glass-to-frame joint