You’re not alone with your rattling windows. A home’s windows might start rattling after 10-20 years of use. Wear due to age will lead to dislodged glass and loose window frames, which may warrant possible replacement windows in the future.

Here are some common causes of window rattling.
Dislodged Glass
Loose window glass is often due to the window frame being poorly adjusted to the glass itself. The best way to fix this is to fill window frame spaces with silicone caulk to reduce air leaks and vibrations.
Loose Frame
Old windows commonly have loose window frames because of their susceptibility to dry rot. Aged windows also have painted wood, which can peel off and expose the window frame to the weather. Filling spaces with caulk can be a band-aid solution to vibrations.
Solutions to Prevent Window Rattling
Now that you’ve identified the causes, it’s time to see the solutions to prevent window rattling.
Solution #1: Weather Stripping
Weather stripping is a solution that uses a strip of rubber, vinyl or other material that fits between the windowpane and the frame. It prevents noise from entering your house through windows when you open and close them.
Solution #2: Rotten Section Removal
Saw off the rotten sections of window frames that can loosen the windowpane. Then apply wood putty to reform the frame’s form and wait for it to cure. Lastly, reinstall the windowpane and ensure it snugly fits to avoid vibrations and rattles.
Solution #3: Mortise Plate Adjustment
A window’s mortise plate is the metal or wood fitting attached to the window frame that locks into the window frame when fully engaged. The function of a window’s mortise plate is to hold the window in place.
In some cases, the mortise plate will loosen for various reasons. Sometimes, the window’s mounting plate will be loose or have come off if the casement or sash is open. If the window is fixed, there may be a broken fastener holding it in place. And lastly, a screw that holds the pane in place may have pulled out of its hole.
Readjustments with screws and wood fillers to restore screw paths are easy ways to adjust and restore mortise plate functionality.
Solution #4 (Recommended): Window Replacement
When your windows are rattling due to age or when the window frame begins to crack, you may want to consider replacing them altogether. Window replacement is a much better option than repair work because new windows offer a long-term solution. Plus, new windows made from high-quality materials are better insulated than older windows prone to rattling.
If you’re looking for excellent window replacement teams in Denver, you can always count on Renewal by Andersen® of Denver for the best project results. Contact us at (303) 968-3287 (Denver) or (719) 313-5403 (Colorado Springs) or use our contact form to request a free quote.