When the summer sun is beating down, many Kiwi homes can quickly become uncomfortably hot. This is particularly so in homes with a lot of glass facing north or west and in homes on the Kapiti Coast or near the beach.
While these homes are double glazed, they often only use standard double glazing that lets in too much heat. Without the right glazing technology, families are left relying on fans or air conditioning to stay comfortable. That’s where SuperTherm™ Cool double glazing makes a big difference.
Stay Cool Without Blasting the Air Con
SuperTherm™ Cool or Protect is advanced Low-E (low emissivity) double glazing designed specifically for New Zealand’s climate. It reduces solar heat and harmful radiation from entering your home, while still allowing abundant natural light. The result is bright, open living spaces that stay cool and comfortable, even on the hottest summer days.
Unlike tinted glass, which often leaves rooms feeling dim, SuperTherm™ Cool & Protect achieves the ideal balance between comfort and clarity. You’ll enjoy uninterrupted views and natural daylight, without the harsh heat or glare.
Why Standard Double Glazing Isn’t Enough
While double glazing is now common in modern builds, standard double glazing isn’t designed for our strong New Zealand sun. Without the right Low-E technology, living rooms, bedrooms, and sun-facing spaces can still feel hot and uncomfortable when the sun pours in.
With SuperTherm™ Cool, you get glazing specifically engineered for Kiwi summers AND winters. It not only keeps your home cooler in summer, whether it’s a retrofit in a classic Wellington villa or an upgrade to a newer property but also protects against glare and fading of furniture and floors due to the combination of light, heat and UV rays and lowers reliance on air conditioning.
Learn more about retrofitting your home
The Science Behind Summer Comfort
Low-E technology works by applying a virtually invisible coating to the glass surface. With SuperTherm™ Cool & SuperTherm™ Protect, this coating reflects a large portion of the sun’s infrared energy back outside, preventing your interiors from overheating. At the same time, it blocks damaging UV rays, helping to protect your furniture, flooring, and artwork from fading and your eyes from summer glare.
As a proud RetroGlaze® partner, Wellington Glass & Mirror offers SuperTherm™ Cool double glazing, bringing the best in global Low-E glass technology to local homes. By reducing heat gain, SuperTherm™ Cool helps your home stay cooler naturally, meaning less dependence on energy-hungry air conditioning systems, lowering your power bills while reducing your carbon footprint.
Source: RetroGlaze® Learn more here
Why Choose SuperTherm™ Cool in NZ?
New Zealand’s unique climate calls for smarter glazing solutions. Traditional single glazing or standard double glazing just can’t provide the same year-round performance. With SuperTherm™ Cool, you’ll benefit from:
- Superior summer comfort – double glazing that keeps indoor spaces cooler.
- Lower energy use – less need for constant air conditioning.
- UV protection to reduce fading of furniture and fabrics.
- Uninterrupted views with clear, natural light.
- Better resale value for your home thanks to modern, energy-efficient glazing.
Make Your Home Summer-Ready
If you’re renovating, upgrading, or retrofitting your windows, SuperTherm™ Cool double glazing is one of the best investments you can make for long-term comfort. Designed specifically for Kiwi summers, it helps you enjoy your home the way it was meant to be – light, bright, and effortlessly comfortable.
At Wellington Glass & Mirror, we specialise in retrofit double-glazing for Wellington, Hutt Valley and Kapiti Coast homes. From classic villas and bungalows to modern apartments, townhouses, and coastal homes, our team tailors every installation to your property’s unique style and sun exposure. Whether you want to stop overheating in your living spaces, cut down on UV damage, or simply future-proof your home, we’re here to help.
👉 Get in touch with our local experts today and discover how SuperTherm™ Cool & SuperTherm™ Protect can keep your Wellington home comfortable all summer long.
FAQs
Yes. At Wellington Glass & Mirror, we specialise in retrofitting older Wellington homes — including timber-framed villas and bungalows. Our team carefully assesses your existing joinery to ensure the new SuperTherm™ units and high-performance draft seals fit seamlessly, improving comfort without changing the character of your home.
SuperTherm™ Cool is designed to let in plenty of natural daylight while reducing heat and glare. Unlike tinted glass, it won’t make your rooms feel dark or block your views — you’ll still enjoy bright, open living spaces.
Yes. The Low-E coating blocks a significant portion of the damaging radiation from the sun which causes fading in furniture, flooring, curtains, and artwork. By upgrading, to SuperTherm™ Cool, you’re protecting both your comfort and your home interior.
Standard double glazing is a much less efficient insulator in winter and does very little to stop solar heat gain in summer. SuperTherm™ Cool is engineered for New Zealand’s sun, reflecting more heat before it enters your home and keeping your home warmer in winter, cooler in summer and more comfortable year-round.
Not necessarily. Many Wellington homeowners choose to retrofit the rooms that get the most sun, like living rooms and bedrooms, first. Our team can help you prioritise which areas will benefit most from SuperTherm™ Cool glazing.