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High-Performance Glass Technology

What Makes Our Double-Glazed Units Better

Our double-glazed units are engineered using world-class components and industry-leading technology to deliver superior comfort and energy performance in New Zealand homes. At the core of every unit are two panes of glass separated by a thermally improved warm-edge spacer and a sealed cavity filled with argon gas. This design creates an effective thermal barrier, reducing heat transfer and improving insulation far beyond single glazing.

Low-E Coatings

Low-emissivity (Low-E) glass features a microscopic metallic coating that reflects radiant heat energy, helping keep warmth inside during winter and reducing solar heat gain in summer. Our Low-E glass is specifically designed in New Zealand for New Zealand conditions, ensuring it performs effectively across our climate zones. 

Argon Gas

All of our double-glazed units are filled with argon gas, a denser, inert gas that improves insulation by slowing the transfer of heat between glass panes. Combined with advanced warm-edge spacer technology and high-performance sealing systems, this helps reduce gas dissipation over time, supporting long-term thermal performance.

Thermally Improved Spacer 

Each double-glazed unit uses a thermally improved warm-edge spacer to separate and bond the two panes of glass. Unlike traditional aluminium spacers, warm-edge spacers reduce heat transfer around the edge of the glass, helping improve overall insulation performance. This technology also supports better argon gas retention and reduces the risk of condensation forming around the perimeter of the unit.

Performance Options 

We offer a range of glazing options to suit different performance needs and budgets, from standard double-glazed units to advanced High-Performance Low-E and Ultra Low-E glass. Each glass type is engineered to control heat transfer, manage solar gain, and improve year-round comfort. 

01. Standard

Standard double glazing with a thermally improved spacer & argon gas.

02. Low-E

Low-E glass, thermally improved spacer & argon gas. (H1 code standard, U-Value 1.1)

03. Low-EUltra

Low-E Ultra glass, thermally improved spacer & argon gas. (Market Leading Glass , U-Value 1)

55%*

Thermal Improvement

81%*

Thermal Improvement

83%*

Thermal Improvement

*Compared to single glazed 3mm clear glass. Data is indicative of performance and is not a guarantee of in-service performance.

Acoustic Glass

For homes near busy roads or noisy environments, acoustic glazing options combine thicker and laminated glass with the insulating properties of double glazing to significantly reduce exterior noise and enhance tranquillity inside

Privacy Glass

We can supply a range of tint and obscure glass choices for privacy, solar control, and aesthetic preference. Whether it’s subtle shading to reduce glare or textured glass to maintain privacy in bathrooms and living spaces, there are options to suit your needs.

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Glass Performance

01. Standard

02. Low-E

03. Low-E Ultra

U-Value (Centre of glass)

Solar Heat Gain (SHGC)

Fading Control (Tdw-ISO)

Visible Light Transmittance

Nicky Sevier, Christchurch

On the 19th January your team of extremely competent young men arrived to install our retrofit . double glazing after patiently waiting while we struggled with health issues which we greatly appreciated. They showed such care to the install and worked so well as a team.
They were very efficient, caring and respectful and the end result is we have a wonderful warm cosy house which is so quiet we can't even hear the dogs barking next door. It is absolutely fabulous. One very large window which we had been told could not be double glazed was fitted by your boys seamlessly and it was exciting to see it going in. We would highly recommend Comfortglaze for any of your window needs, they are an extremely competent, friendly and wonderful company to deal with.
Nicky and Moses

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