Double Glazing

Double glazing can make a big difference to comfort levels in your home. Combined with insulation in the walls, ceiling and floor, double glazing your windows and doors will help keep temperatures stable and reduce heating and cooling costs.

By double glazing a window with clear glass, you can halve the heat loss compared to a single-glazed window of the same size and shape. You can reduce the heat loss further by using different glass types (such as Low-E glass) and using argon gas to fill the space between the two panes of glass.

Double glazing also helps to reduce condensation.

What is double glazing?

A double-glazed window uses two panes, separated by a 6-12mm gap which is filled with air or an insulating gas such as argon. It is also known as an Insulating Glass Unit (IGU).

How effective is double glazing?

Double glazing can make a big difference to comfort levels in your home. Combined with insulation in the walls, ceiling and floor, double glazing your windows and doors will help keep temperatures stable and reduce heating and cooling costs.

By double glazing a window with clear glass, you can halve the heat loss compared to a single-glazed window of the same size and shape. You can reduce the heat loss further by using different glass types (such as Low-E glass) and using argon gas to fill the space between the two panes of glass.

Double glazing also helps to reduce condensation.

Double glazing and noise reduction

Double glazing can also help to reduce noise levels, particularly in the medium to high frequency range (including voices). However, double glazing on its own won't filter out loud or low-frequency noise such as that from traffic.

More effective noise reduction can be achieved by using thicker glass or by using laminated glass (some laminated glass comes with a thick acoustic inter-layer). The gap between the panes can also be increased for more effective noise insulation, but this reduces the effectiveness of double glazing as a heat insulator.

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