The bigger the glass area the bigger the heat loss so take advantage of Thermoglaz’s unique system designed in accordance with BRANZ specifications for double glazing into timber windows (as per diagram). All existing timber windows and doors are machined and glazed on site. The Thermoglaz system can fit double glazed units into existing timber windows of any size and shape.

Using the existing windows means a saving of between 30% and 40% over other methods of double glazing in which whole new windows are installed.