Get comfortable the easy way, with RetroFit® double glazing by Metro Glass.

Get comfortable the easy way, with RetroFit® double glazing by Metro Glass.

RetroFit® Double Glazing are New Zealand’s trusted Retrofit glazing specialists, transforming existing windows and doors with energy efficient double glazing solutions. Delivering year round comfort, improved insulation and a healthier home environment.

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Retrofit double glazing promotion and offers

Making it easier to enjoy comfortable living and experience the benefits of a healthier, warmer, drier and cooler home year-round.

Don't forget to check out our attractive payment terms.

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How retrofit works?

What is retrofit double glazing?

Retrofit double glazing involves replacing the single pane of glass in your windows and doors with new energy efficient double glazed units into your existing window frame.

Learn more Get a free quote
Hand touching double-glazing windows

Retrofit aluminium and timber, reglazing

We can retrofit new energy efficient double glazed units into your existing timber or aluminium window frames

Learn more Get a free quote
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The benefits of retrofit double glazing

Retrofit double glazing can enhance your in-home living comforts. You and your family should be comfortable in your home no matter what the season or the weather is doing outside.

Learn more Get a free quote

What is retrofit double glazing?

Retrofit double glazing involves replacing the single pane of glass in your windows and doors with new energy efficient double glazed units into your existing window frame.

Learn more Get a free quote
Hand touching double-glazing windows

Retrofit aluminium and timber, reglazing

We can retrofit new energy efficient double glazed units into your existing timber or aluminium window frames

Learn more Get a free quote
Girl playing sitting in front of double glazed windows

The benefits of retrofit double glazing

Retrofit double glazing can enhance your in-home living comforts. You and your family should be comfortable in your home no matter what the season or the weather is doing outside.

Learn more Get a free quote
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The biggest and best double glazing range in New Zealand

All our factory sealed double glazed units are processed in New Zealand and made for New Zealand conditions. All our units come with a 10-year manufacturer warranty.

View our range

New product launch

Introducing our SunX™ Reflect Low E glass with cutting-edge solar technology

SunX™ Reflect Low E double glazing

Our newest ultimate solar control technology with a reflective appearance for privacy

☀️   Reduce solar heat gain by up to 74%* to help with overheating

🌡️  Up to 78%* better heat retention keeping your home warmer

*compared to single glazing. 

View our range

SunX™ Reflect Low E double glazing

Our newest ultimate solar control technology with a reflective appearance for privacy

☀️   Reduce solar heat gain by up to 74%* to help with overheating

🌡️  Up to 78%* better heat retention keeping your home warmer

*compared to single glazing. 

View our range

Don't miss our Spring promo out now!

There’s never been a better time to double glaze your home – and we’ve made it even more exciting.

Spring retrofit double glazing special -
3 Deals, You Choose!

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Why RetroFit® is a trusted choice

Instead of replacing your whole window which can be expensive. We replace your existing single glazed glass with a new factory sealed energy efficient double glazed unit into your existing window frames, saving you on costs. We work with your budget and have attractive payment terms to suit.
Our process
elderly couple looking out of double glazed windows

We find the right double glazing solution for your home by helping you prioritise what is most important to you, such as retaining heat, solar control, level of natural light or noise control. Our experts then tailor a suitable option for your home.
Your priorities
Koru fern

Our double glazed units are made for New Zealand conditions and are factory sealed locally in our New Zealand plants. We're part of Metro Glass and have been pioneering glass for over 35 years.
Locally Processed
family relaxing on couch with double glazing windows

By choosing us you're guaranteed the biggest and best double glazing range in New Zealand. Because of our diverse range - whatever your priorities are we can tailor a double glazing solution to suit.
Your solution

Instead of replacing your whole window which can be expensive. We replace your existing single glazed glass with a new factory sealed energy efficient double glazed unit into your existing window frames, saving you on costs. We work with your budget and have attractive payment terms to suit.
Our process
elderly couple looking out of double glazed windows

We find the right double glazing solution for your home by helping you prioritise what is most important to you, such as retaining heat, solar control, level of natural light or noise control. Our experts then tailor a suitable option for your home.
Your priorities
Koru fern

Our double glazed units are made for New Zealand conditions and are factory sealed locally in our New Zealand plants. We're part of Metro Glass and have been pioneering glass for over 35 years.
Locally Processed
family relaxing on couch with double glazing windows

By choosing us you're guaranteed the biggest and best double glazing range in New Zealand. Because of our diverse range - whatever your priorities are we can tailor a double glazing solution to suit.
Your solution
Couple talking in home, while looking at double glazed windows online

Find out if retrofitting is right for your home

We understand that each home is different, our expert Retrofit consultant will assess your home, and recommend a tailored solution for you and your budget.

Get a free quote

Learn more about retrofit double glazing

Check out some of our key blogs about retrofit double glazing. To view all our blogs click here.

What is double glazing?

Read more
Couple dancing in lounge in front of double glazed sliding doors

Is retrofit double glazing worth it?

Read more
Double Glazing in Aluminium Windows

How does retrofit double glazing work?

Read more
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View what our customers have to say about us

View testimonials and reviews

Spring special - Upgrade your home and choose from: 10% off, Free performance glass upgrade or 12 months interest free directly with us. No finance companies. No credit checks. Find out more HERE or 👉 Click here to get your free quote and claim your offer. Use code: SPRING2026. Terms apply.