Foggy Window? Cracked Seal? A Homeowner’s Guide to Double Pane Glass Window Repair
| Repair Type | Cost per Window | Lifespan | Energy Efficiency Restored? | | :--- | :--- | :--- | :--- | | Defogging service | $60–$100 | 1–3 years | No (low) | | DIY IGU replacement | $50–$150 (glass only) | 5–15 years | Yes (if sealed correctly) | | Pro IGU replacement | $150–$400 | 10–20 years | Yes | | Full window replacement | $500–$1,200+ | 20–30 years | Yes (plus new frame) | double pane glass window repair
Double pane windows (also known as insulated glass units or IGUs) are a staple of modern energy-efficient homes. They consist of two panes of glass separated by a spacer and a layer of gas (usually argon or krypton) or dry air. Foggy Window
But when they fail, they don’t fail like a single sheet of glass. If you see fog, condensation between the panes, or a hazy film, Here’s what you need to know about repairing them. | | :--- | :--- | :--- |
Contrary to popular belief, you generally simply "reseal" a foggy window. Once the desiccant (moisture-absorbing material inside the spacer) is saturated and the seal fails, the unit is compromised.
Have you tried defogging or replaced an IGU yourself? Share your experience in the comments.
If you have foggy double pane windows, is almost always the right answer. Defogging is a band-aid. And before you DIY, remember: modern double pane glass is heavy, and a measurement error of 1/8" means your new glass won't seat properly.