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Double Glazing

What is double glazing?

A Double Glazed Unit is made from two panes of glass separated by a layer of air or gas.

Also known as an Insulating Glass Unit (IGU) they can be made from two different types of glass depending on the specific requirements of your home. Single glazed windows are the most significant source of heat loss in a home. The more glass surface area you have, the more heat you stand to lose. In a well-insulated home, approximately 51% of heat is lost through single-glazed windows.

However, heat loss through single glazed windows can be halved using double glazing. In a double glazed window the gap between the two panes of glass is filled with air. Air is a poor conductor of heat, so heat loss is reduced.

Double glazing a window can halve the heat loss compared with a single glazed window. You can reduce heat loss further by using different glass types (such as Low E Glass) or by choosing units which use argon gas instead of air to fill the space between the two panes of glass.

Since 2007, New Zealand building standards have specified that new homes must be fitted with double glazing. When double glazing is combined with ceiling, wall and floor insulation you will reduce your energy use, save money on your energy bills and improve the comfort of your home. The overall result for you and your family is a healthier home.

Benefits of Double Glazing

  • A cozy, comfortable home all year round - warmer in winter and comfortably cool in summer
  • Healthier home with less condensation - warmer houses have drier windows and a drier home is much healthier
  • Quieter nights - creating a shield against external noises
  • Lower energy bills - double glazing offers superior energy efficiency
  • Increased security - double glazed windows are much harder to break
  • Reduces draughts - well insulated, warm homes aren’t draughty
  • Adds value to your property - indicates to potential buyers that the house is well insulated, warm and cared for
  • Reduces fading of furniture and furnishings - minimises the impact of the sun’s harsh ultraviolet rays


Thermal Insulation (Argon Gas)

Boost the insulation benefits of double glazing by combining argon gas and Low E glass. This will create high performance double glazing.

What is Argon Gas?

Argon gas is a naturally occurring, non-harmful gas. When argon gas is inserted between the panes of glass it increases the insulating performance of your double glazing. Argon gas is denser than air, so adding it to the air between the two panes improves thermal insulation efficiency. When a glazing unit features Low E glass and argon gas it brings the temperature of the window closer to room temperature. This combination eliminates air currents and drafts that occur when differing temperatures meet.


Triple Glazing

Three Panes of Glass

Triple glazing takes window insulation one step further.  A Triple Glazing Unit comprises of three panes of glass separated by air gaps.  Triple glazing provides the highest levels of heat retention and noise reduction.

Triple glazing is a great option to further enhance thermal performance.  It is also available for certain architectural designed window frame systems.