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Foggy Windows: Causes, Fixes, and When to Replace
Foggy or hazy windows? Learn why double-pane windows fog up, how to fix failed seals, and when to call Virginia Glass Windows for professional IGU repair.
5
Warning Signs
5
Known Causes
6
Solution Steps
Free
Professional Assessment
Common Symptoms
Cloudy or hazy appearance between glass panes
Condensation that cannot be wiped away from either side
White or milky film inside the glass unit
Moisture droplets visible between panes in morning or evening
Distorted view through the window
What Causes This
Failed or broken seal on the insulated glass unit (IGU)
Age-related seal degradation from UV exposure and thermal cycling
Manufacturing defect in the original seal
Improper installation causing premature seal failure
Physical damage to the window frame warping the seal
How to Fix It
Solution Steps
1Inspect all windows to identify which panes have failed seals
2Check if the window is still under manufacturer warranty
3For newer windows, contact the manufacturer about warranty replacement
4For out-of-warranty windows, get a professional assessment for IGU replacement
5A technician will measure the glass unit and order a custom replacement
6The old IGU is removed and a new sealed unit is installed in the existing frame
When to Call a Professional
When fog or haze appears between double or triple pane glass
When the condensation cannot be reached for cleaning
When you notice increased drafts or energy bills alongside fogging
When multiple windows in your home show the same symptoms
Stay Ahead
Prevention Tips
Choose windows with high-quality seals and spacer systems
Avoid pressure washing directly on window seals
Keep window frames properly caulked and maintained
Address any water drainage issues near windows promptly
Schedule annual window inspections to catch seal failures early
Common Questions
FAQs About This Problem
Yes. In most cases, only the insulated glass unit (IGU) needs replacement, not the entire window frame. This is significantly less expensive than a full window replacement.
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