Window seal failure can occur for various reasons. The most common sign of window seal failure is moisture between the glass panes. To address the problem, it is still critical to identify what caused it in the first place.

In this post, Renewal by Andersen® of Denver discusses the common culprits that cause window seals to fail.
Age
Windows that are old and drafty are more likely to have seal failure. To prolong the life of your windows and avoid untimely window seal failure, update the weatherstripping and maintain your windows regularly.
Extreme Weather Conditions
Window seals are designed to withstand harsh elements. However, water can seep behind the seals if the windows are constantly exposed to moisture. Extremely hot or cold temperatures can also cause window seals to shrink, sag or crack.
Mold
Mold can grow due to excessive moisture and damage the window seal. It can render the seal ineffective, especially if it is made of rubber. To kill the spores, immediately remove the mold or discoloration with an alcohol-based cleaner or vinegar.
Movement
If the window seal was not installed correctly or has become dislodged over time, it will eventually fail. Remember that the weatherstripping must be installed in a specific location depending on the variety used and the window type. Proper tools must be utilized to install weatherstripping, and replacements must be made as needed.
Poor Maintenance
Overlooking your dirty or damaged windows can also lead to window seal failure. Have your windows regularly inspected by a professional to ensure the necessary upkeep.
Ensure the seals of your replacement windows are working. Renewal by Andersen of Denver is ready to offer help if you suspect something is wrong with your window seals. Call (303) 968-3287 (Denver) or (719) 313-5403 (Colorado Springs). You can also request a consultation by filling out our contact form.