You can make your older windows last a little longer with a little window glazing know how. This process for single pane windows can help ensure they stay draft-and leak-free for years to come.
Glass on older windows is usually held in place by glazing compound, but over the years this can get hard, crack, or fall off. If your window has loose or missing compound, you might have a drafty or leaky window on your hands.
For supplies, you`ll need a putty knife, a heat gun, and, if you`re replacing any broken glass, the new glass piece, sized appropriately to fit the window. You`ll also need glazing putty (oil or latex), glazing points, and latex caulk. It`s also advisable to wear gloves and eye protection for this project. To begin, it`s best to remove the single window pane from its mounting in the wall so you can access it from all sides. Lay it on a flat, solid surface like a sturdy table or workbench.
Next, use the putty knife to loosen and remove chunks of glazing compound from the window. For stubborn areas, soften them with the heat gun (with gloves on). Keep the heat gun moving; you`ll crack the glass if you keep it in one spot too long. Scrape away the putty once it is pliable.
Prime the bare wood inside the frame with a shellac-based primer that dries fast. Next, follow the directions on the glazing compound. (Instructions may differ for laying new glass versus glazing existing glass.) Apply a layer to fill in the recesses, not leaving any gaps or hollow spots. Smooth the new glazing compound in place with your putty knife. Remove the excess from the glass.
Read the label on your putty to learn the drying time so you know how long to wait before priming and painting your window.
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