Window Seal Failure: Causes, Signs, and How to Fix It
Window seal failure occurs when the airtight barrier between insulated glass panes breaks down, allowing moisture and air to enter. This leads to foggy windows, condensation, and reduced energy efficiency. Common causes include aging, poor installation, and weather extremes. Fixing seal failure may involve replacing the insulated glass unit (IGU), using defogging kits, or installing new windows. Prevent future failures by choosing high-quality windows, ensuring proper installation, and reducing indoor humidity.









