
Sealed unit failure is a constant headache for many people who have spent their money on double glazing. There are hundreds of thousands of units with moisture in between the two panes of glass. There are many different common names for this failure.
Unit breakdown, sealed unit failure, failed seal, broken down unit, fog, misted units, foggy units, broken seal and others. However they all mean one thing. The unit needs replacing. Or does it? Look here for my explanation: Welsh Windows

