Microscopic crack in the sealant or desiccant tube. Invisible to the naked eye. Argon gas begins leaking out at a rate of roughly 0.5–1% per day.
A broken window seal occurs when the airtight barrier between the panes of a double- or triple-pane window fails, allowing the insulating gas (like argon) to escape and moisture to seep in How to Identify a Broken Seal Fogging or Condensation broken window seal exclusive
In the world of modern glazing, the "exclusive" nature of this problem is that it belongs strictly to insulated glass units (IGUs)—those double or triple-paned windows that rely on an airtight perimeter. Unlike a cracked single-pane window, a broken seal operates under its own rules. It doesn’t let drafts in immediately, but it destroys energy efficiency and curb appeal from the inside out. Microscopic crack in the sealant or desiccant tube
The "exclusive" feature of modern double or triple-pane windows is the IGU. When functional, it acts as a self-contained environment designed for thermal performance: A broken window seal occurs when the airtight