| 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) |
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. double pane glass window repair
Here are your three real-world options:
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. | Repair Type | Cost per 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. And before you DIY, remember: modern double pane
Check your original window warranty. Many high-quality windows have 20-year seal warranties that transfer with the home. You might get free glass replacement!