How to Repair Window Putty: A Step-by-Step Guide to Restoring Your Windows Old, cracked window putty isn't just an eyesore—it’s a draft-maker and a moisture-inviter. If you’ve noticed the glazing around your glass panes looking like a dry lakebed, it’s time for a weekend DIY project. Replacing window putty (also known as "glazing") is one of the most cost-effective ways to boost your home’s energy efficiency and protect the wood from rot. Here is everything you need to know to get those windows looking—and performing—like new. Tools and Materials You’ll Need Replacement Glazing Putty (oil-based or latex) Putty Knife (a stiff one for removal and a flexible one for smoothing) Heat Gun or Hairdryer (to soften old putty) Glazier’s Points (small metal clips that hold the glass in place) Linseed Oil or Exterior Primer Small Paintbrush Glass Cleaner Step 1: Remove the Old, Crusty Putty The hardest part is often getting the old stuff out. Use your stiff putty knife to carefully pry away the loose chunks. Pro Tip: If the putty is stubborn, use a
This guide explains how to identify, remove, and replace window putty to ensure a professional, weather-tight finish. repair window putty
Before starting, inspect your windows for these common indicators of failure: How to Repair Window Putty: A Step-by-Step Guide