Broken Seal — In Double Pane Window |link|

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.

You glance at your living room window on a sunny morning. The view of your garden should be crystal clear, but instead, you see a persistent, milky fog clinging to the inside of the glass. No amount of wiping will remove it. You’ve just discovered the classic hallmark of a broken window seal . broken seal in double pane window

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