Condensation Between Window Panes: Causes and Solutions
What Condensation Between Panes Usually Means Fogging between the panes generally points to seal failure, not a cleaning problem or a normal weather event. People often assume the window just needs better ventilation, but if the fog is between the panes, the glass unit has already lost part of its insulating performance. Once the seal fails, outside air and moisture can enter the space, and the glass may stay cloudy in certain weather or remain permanently hazy.