That means the window is double-glazed, which is a good thing. But it also indicates the gap between the panes is no longer ...

Condensation is rife at this time of year, and it can be difficult to know the best way to deal with it. But once you do know ...

We're often urged to double glaze our windows ... should fit over quite comfortably, leaving a small air gap between the inner and outer layers of plastic. This creates your 'double glazing ...