Removing old putty and replacing it with new in a wooden window can be challenging. Often the putty has hardened or has been painted over.
Sometimes the putty on your windows wears out, even though the glass is still perfectly good. The glazer’s putty is what creates an air and water tight seal between the window pane and the window frame. If the putty deteriorates, the seal is no longer functional. You can replace the putty on your windows with just a few simple tools.
8Dip your glazing tool into linseed oil before smoothing out the putty in Step 9. It will help make the job go easier and smoother. Supplies for replacing putty in windows are available at home improvement and hardware stores.Use caution when re-inserting window pane into frame. Firm even pressure will help prevent it from breaking under too much pressure.
Remove the glass. If the glass is intact, carefully press from the opposite side to remove it from the frame. Set it aside.
Knead the putty until it is soft and pliable. Apply a 1/16-inch layer of putty around the frame in the slot where you removed the window pane.
Knead more putty if necessary. Make putty "rope" by rolling between palms. Lay putty rope into slot where window pane rests, directly on top of the glazer's points. Use a putty knife to push the putty into the slot and create a seal between the window glass and wood frame. Don't put it on too thickly.