Window replacement can be costly, but removing old window glazing or putty can be a DIY project. Home Depot explains that repairing windows can be more cost-friendly than replacing them. They recommend that you remove the window sash first and wear safety goggles and heavy gloves, particularly if any glass is broken.
What removes putty from glass?
A sharpened, stiff-edged putty knife can help break away the putty, but old putty can be very hard and tough to loosen from the glass and frame. A heat gun can help soften the putty and work in conjunction with the putty knife for easier removal.
Can you putty over old putty?
You can patch in new putty on top of old putty as long as the old stuff is still adhering well. We call this spot glazing and here’s how you do it: Using a putty knife or 5-in-1, dig out as much of the old putty as possible. Leave the really stubborn stuff in place.
