Windows - what to look for
Double glazing works by creating an insulating layer of gas between two panes of glass.
Retrofit double glazing is still quite expensive in New Zealand so it's worth repeating that it's not required in HomeFit as long as the home has 'good' curtains. However, double glazing is very effective at reducing heat lost through windows and will make the home significantly more comfortable. Consider retrofitting when carrying out a major refurbishment or replacing windows.