What is double glazing?

Double glazing is a way of holding in heat by creating an insulating layer – either normal air or special heavy gases – between two panes of glass while still letting in as much sunlight as single-glazed windows.

It is worth installing in existing homes if you’re doing substantial repairs or replacing windows, but if you need to prioritise, install double glazing to the main heated areas of the house and to large windows.

The bonus: you reduce the amount of external noise you hear, and reduce or remove condensation build-up in cold weather.