If you’ve noticed a hazy, milky film between your window panes that refuses to wipe away—or worse, a puddle of water on the sill after a rainstorm—your double pane window has likely lost its seal.
| Problem | Repairable? | Best Solution | | --- | --- | --- | | Foggy glass (failed seal) | Not truly repairable on-site | Replace the IGU | | Broken glass (cracked pane) | Not repairable while installed | Replace the IGU | | Broken seal but no fog yet | Rarely worth it | Replace IGU | | Condensation on the surface | Yes (not a seal failure) | Adjust humidity / clean | double pane glass repair
That gas is the key. It slows heat transfer, keeping your home warmer in winter and cooler in summer. The perimeter seal of the IGU has broken. Moisture from outside air enters the space between the panes. The desiccant becomes saturated, the glass fogs up, and the insulating gas escapes. If you’ve noticed a hazy, milky film between
Once that happens, your "double pane" acts more like a single pane—with condensation stuck in the middle where you can't clean it. It depends on what you mean by "repair." It slows heat transfer, keeping your home warmer