: Measure the height, width, and thickness of the opening. Subtract approximately 1/8 inch from the width and height to allow for the frame's expansion and contraction.

: Typically use annealed glass. If yours broke into large, jagged shards, it's likely annealed.

: Large retailers like The Home Depot and Lowe's sell glass sheets and many locations will cut them to your specific dimensions in-store.

: If the glass crumbled into tiny, dull pieces, you need tempered or safety glass, which is common for doors and low-reaching windows. Quick DIY Replacement Steps

: Sites like One Day Glass and Royalty Mirror allow you to order custom-cut insulated glass units (IGUs) for double-pane windows online, often with shipping directly to your door. Choosing the Right Glass

: For wood frames, sand the grooves and apply a sealer or linseed oil to prevent the new putty from drying out too quickly.

: Apply a thin bead of glazing compound or silicone. Press the new pane into place and secure it with glazier points (metal clips).

: Wear heavy-duty gloves and eye protection to remove broken shards. Use a heat gun and putty knife to soften and scrape away old glazing compound or sealant.