Over time, the trapped moisture breeds mold and mildew between the panes. This can turn the fog into a black or green film, blocking natural light entirely.
While it might seem like a minor cosmetic issue, a failed seal is a sign that your insulated glass unit (IGU) is no longer performing its primary job. Here is everything you need to understand about why seals fail, what it costs you, and how to fix it. To understand the problem, you first need to understand the engineering. A double-pane window (also known as a thermal or insulated window) consists of two sheets of glass separated by a spacer. That spacer is filled with a moisture-absorbing material called a desiccant. broken seal in double pane window
Argon gas is roughly 67% more insulating than regular air. When the seal breaks, the gas escapes and is replaced by humid air. This drops the center-of-glass R-value (insulation rating) by nearly half. You will pay more to heat your home in winter and cool it in summer. Over time, the trapped moisture breeds mold and