SuperTherm Low-E Double Glazing

Supercharge your windows and doors with SuperTherm™ Low E double glazing. Experience real home comfort with warmer, drier and quieter windows thanks to SuperTherm™ Low E double glazing.

The SuperTherm™ range of double glazing solutions, allow your windows to filter the right heat and light from the sun, all without compromising the clarity of the glass, keeping views more natural and a whole lot more comfortable on the eyes. 

Traditionally, homes in New Zealand were fitted single-pane glass however in more recent years, double glazing has become increasingly popular and is now required to be installed in all new home builds due to its improved insulation and energy-saving performance.

What is Double Glazing?
Double glazing is a sealed unit comprising two panes of glass held apart by a thermal spacer with air or argon gas fill sealed inside.  The space acts as a thermal blanket to slow down the transfer of heat through the double-glazing, helping to keep the inside pane at a constant temperature - unaffected by outside temperature changes.  

What is Low E?
Low E (or Low Emissivity) glass contains a coating that acts as a filter to let the right solar energy in whilst rejecting the damaging effects of excessive heat and light.  This filter also works to keep the heat generated within your home, in your home where it belongs. 

SuperTherm™ Low E
SuperTherm™ high-performing Low-E double glazing is superior in its performance and quality with excellent thermal performance and with noticeable clarity.  

Choose from the range of SuperTherm™ double glazing options to suit the requirements of different areas in your home.

  • Category
    Double and Triple Glazing, Sash Windows, Acoustic Insulation
  • Range
  • Brand
  • Designer
  • Year
  • Warranty
    10 years
Scope of use

New and existing window joinery.

Understanding SuperTherm™

SuperTherm™ High Performing, Low-E double glazing
SuperTherm™ Low-E double glazing is a new generation of glass that is noticeably clearer than traditional window glass and doesn’t include the slight purple haze of some other Low-E products. 

In New Zealand, we generally want lots of the healthy ‘daylighting’ that comes from visible light, and much less of the unhealthy UV light that fades furniture and damages our skin, all whilst managing a comfortable level of warmth inside our homes.

SuperTherm™ Low E double glazing allows you to filter heat and light all without compromising the clarity of the glass, keeping views more natural and a whole lot more comfortable on the eyes. 

Different SuperTherm™ Low E double glazing solutions mean you can select the best option to suit the unique challenges of your home or areas of your home. 

SuperTherm™ Low E double glazing is produced under controlled factory conditions to ensure consistent high-quality double glazing. The manufacturers meet BRANZ-tested requirements and the double glazing is compliant with required NZ Standards and Building Code regulations.

SuperTherm Warm™ double glazing

lets daylight and warmth in, and keeps it in

SuperTherm Warm™ double glazing is designed to maximise daylight and free warmth from the Sun, whilst providing outstanding thermal insulation.

The glass used in SuperTherm™ is a neutral, lower iron glass, designed to let in lots of daylight. Its nanoscopic coating is specially designed to let the radiant heat from the Sun pass through, yet stop the heat produced within your home from escaping (for example, from a fireplace or electric heater, from electrical appliances, and from people).  The SuperTherm Warm™ heat-loss-stopping-power is remarkable.  Compared with single glazing, it can reduce heat loss through double glazing by up to 81%!

SuperTherm Warm™ double glazing is designed for homes, or areas in a home, where the owners are seeking to capture as much warmth from the Sun (particularly in the cooler months) and keep the warmth in.

SuperTherm Cool™ Double Glazing

lets daylight in while managing solar heat, and insulates superbly

SuperTherm Cool™ double glazing has been developed for homes and areas of homes where the Sun’s radiant heat causes overheating.  For example, it is an excellent solution to use in West-facing windows that have too much solar gain in Summer.

SuperTherm Cool™’s nanoscopic coating is designed to block the Sun’s heat and reduce glare, while still letting through a large proportion of daylight.   While its heat rejection properties don’t eliminate the need for summer cooling ventilation, SuperTherm Cool™ does something remarkable.  It has heat rejection performance that is better than tinted glass commonly used all around New Zealand, yet without compromising daylighting.  Its insulation performance is also superior.  SuperTherm Cool™ reduces heat loss through glass by up to 83%, compared with single glazing.

SuperTherm Cool™ double glazing is designed for homes, or areas in a home, where owners are seeking to reduce the radiant heat from the Sun in summer, and excellent thermal insulation in the cooler months – to keep the warmth in.

SuperTherm Protect™ Double Glazing

provides superior all-round home comfort and protection

SuperTherm Protect™ double glazing combines the superior insulating performance of SuperTherm™ double glazing together with acoustic laminated glass and provides increased home comfort and protection in three areas:

–  First, it provides impressive noise insulation, which compared with 3mm single glazing, equates to a perceived noise reduction of up to 63%.

–  Second, it has far superior protection of furnishings from fading.  This comes from its virtual elimination of UV, together with stopping the majority of the Sun’s radiant heat.

–  Third, the inside glass pane has superior strength and safety properties that provides a greater level of home security.  In the event of a natural disaster, the glass is more likely to hold in place, protecting the occupants of the home.

SuperTherm Protect™ is designed for New Zealand homes and areas of a home that require a higher standard of all-round comfort and protection.


What is genuine double glazing?
When it comes to improving your home comfort by increasing the insulation performance of your windows, there are many products available in New Zealand to choose from. Genuine double glazing is a unit that consists of two pieces of glass connected by a hermetically (air-tight and water-tight) sealed spacer and filled with either air or argon gas. Read more….

Will double glazing help me beat the cold and damp this winter?
Did you know that up to 50% of a home’s heat is lost through windows and doors!? Single-glazed windows lead to colder homes and a greater likelihood of condensation and moisture. High-performing, Low E double glazing, such as the RetroGlaze SuperTherm™ range, can keep the cold temperatures at bay giving you a better-insulated home. Read more…

  • Superior Insulation Comfortable Home.
  • Reduce the Impact Of Unwanted Noise.
  • Minimise Furniture Fading and Glare.
Get in touch
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About the

Your trusted double glazing solution with RetroGlaze Network

We are a network of "RetroGlaze Partners" that provide specialist services in Timber and Aluminium Retrofit Double Glazing and Replacement Windows & Doors.   

Timber and Aluminium Retrofit Double Glazing is the process of removing the inefficient single glass and replacing it with genuine double glazing, so you can keep the character and feel of your home whilst improving the comfort inside.

Replacement Windows and Doors provide a fresh look to your home. Choose from a range of new thermal aluminium window and door options, further enhanced with SuperTherm™ Low-E double glazing.

When you double glaze your home with a RetroGlaze Partner you can have complete confidence that your double glazing will be customised to your specific needs, look great, perform exceptionally and be built to last.

The network of RetroGlaze Partners is local family-owned businesses around New Zealand, with a central support base in Taupo. These businesses employ systems developed and proven here in New Zealand over the last two decades.

Right solutions
Whether you have timber or aluminium joinery, we have spent years researching and refining our solutions and installation process to ensure your windows provide the right results for your home.

Superior products
There is a large range of products on the market and we have carefully selected what we believe are the leading products and technologies to provide you with a superior double glazing solution.

Trusted service
We expect that your situation is unique, so our double glazing specialists work with you to understand your needs and ensure your solution genuinely improves the health and comfort of your home.