The Truth About Failed Sealed Units
When your double glazed windows develop condensation between the panes, many glazing firms will tell you the only solution is to replace the entire sealed unit — or worse, the whole window frame.
What they don't tell you is that failed sealed units can be repaired in around 20 minutes, using nothing more than a standard household drill and some tap water for lubrication.
Why Don't Glazing Firms Tell You This?
The answer is simple: there's far more profit in selling new windows. A replacement sealed unit typically costs £100-£300 per window fitted. Multiply that by the average home with 10-15 windows, and you're looking at thousands of pounds.
A Condensation2Clear repair kit, by contrast, can fix multiple windows for a fraction of that cost.
The Repair Process
The repair involves drilling two tiny 4mm holes through the inner pane (using diamond-coated drill bits), applying drying agent pellets to absorb the moisture, and fitting one-way vents once the window has cleared.
The repair converts the sealed unit into a pressure-equalised unit — meaning it can breathe without trapping moisture. This actually makes the unit more stable than the original sealed design, as it's no longer subject to the destructive cycle of solar pumping.
But Won't I Lose My Argon Gas?
If your unit has failed, the argon gas has already escaped. You're now looking through two panes of glass with damp air between them. After repair, you have dry air between the panes — which performs nearly as well as argon (within 1-2%).