What is Retrofit Double Glazing? 

Retrofit double glazing is the process of removing the existing single pane of glass in your windows and doors and replacing it with an insulated glass unit that also has a high quality low-e glass, which ensures your home is light, warm and comfortable all-year-round.

Throughout the South Island, and in parts of the North Island our Viridian Glass branches offer a premium retrofit double glazing service. 

For more information on the process: click here

To find your nearest retrofit double glazing installers: click here

double glazed windows

A lighter, brighter home

Our low-E glass has a clear metallic coating that keeps the heat locked inside the home without sacrificing natural light. And, with 81% light transmission, it is the clearest Low-E glass available in New Zealand. 

double glazed windows cost

Always stay warm

Heat loss can be reduced by up to 80% using our retrofit system. The combination of low-e glass within a double-glazed glass unit with argon gas provides the ultimate solution for all homes, ensuring you'll always be warm in your home. 

double glazed windows

An easy choice

Using our premium low-e glass, you will save 52% on electricity compared to standard double glazing. Capturing and trapping the suns heat and light allows your family to be more comfortable in a much more economical way. 

Retrofit Double Glazing

Reduced Condensation

Viridian Retrofit double glazing will help significantly reduce condensation on your windows. This saves you all the hassle wiping and drying off your windows and window sills.

Money saving

Lower Heating Costs

Because Viridian Retrofit double glazing helps reduce heat that is lost through your windows, your home will stay warmer and you can enjoy the added benefit of lower heating costs.


Reduced Noise

Viridian Retrofit double glazing provides better noise reduction than single glazing. By reducing the amount of outside noise that enters your home you can have a quieter and more peaceful interior.