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 ...

or double-hung windows, as well as sliders and patio doors. Window glazing services can recommend replacement glass with different colors and opacity, and may also be able to install replacement glass ...