Double-pane windows are sealed units. If there is a manufacturing defect in the seal or the spacer, the unit might not handle barometric pressure changes correctly. If the pressure outside drops significantly (like during a heavy storm), the glass can bow outward. Since the outside pane is resisting the pressure, it may crack under the stress.
A crack in the exterior pane is a specific issue with specific causes. In this post, we’ll break down why it happened, what risks it poses to your home’s efficiency, and exactly what you need to do next. double pane window cracked on outside
You might be tempted to put a piece of duct tape over the crack or apply a glass repair resin (like the ones used for windshields). , it is not a permanent solution. Double-pane windows are sealed units