Window Putty Repair May 2026

For $20 and a few hours, you can extend the life of a historic window by 30 years. That’s a win for your wallet, your home’s character, and the landfill.

Remove any glazing points you find (those tiny metal triangles) with needle-nose pliers. You’ll replace them later. This step separates pros from amateurs. window putty repair

The putty should slope from the glass down to the wood. This sheds water away from the glass. Flat or reverse slopes trap water and guarantee failure. For $20 and a few hours, you can

Wipe the bare wood with a brush and denatured alcohol to remove dust, oil, and old paint residue. —new putty will not stick to dirty or oily wood. You’ll replace them later

The glass is cracked, the sash is rotted through, the window is second-story or higher, or you have 20+ windows to do. Professional glaziers can also remove and reset an entire pane in minutes. The Bottom Line Window putty repair is not glamorous. But finishing a window that no longer whistles on a windy night? That feels like a victory.

Happy glazing, and may your putty knife never slip.