Technical information

Technical information

Technical support

  • Retrofit double glazing is part of Metro Performance Glass (Metro Glass) which has been leading and innovating glass technology for over 30 years.

  • We pride ourselves on delivering comprehensive, accurate, and up-to-date technical insights and making them accessible for Kiwi homeowners.

  • If you're seeking guidance on how you can make your home a healthier home to live in, our dedicated team is committed to providing you with the essential information you need to make the best choice for your home.

  • With our expertise and resources, navigating the complexities of technology and understanding how it can benefit you has never been easier.

  • Trust us to be your reliable source for all your double glazing technical inquiries and get started on your journey to making your home a warmer, drier healthier place to live in.

Find your local branch call 0800 658 658

Download our technical brochure - Low E double glazing

We have developed a technical brochure to help you determine the right level of performance for your home. Every home is different and we will help tailor a solution based on your performance requirements and comfort priorities exclusive to your home.

Technical brochure

Performance data

Click the individual products below to view their performance values.
Or click here to view our full retrofit double glazing range.

View range
Pile of double glazed windows

Learn about glass from New Zealand Window and Glass Association.

Here are two useful guides to visual quality of glass for residential homes and general information about the different types of glazing.

Glass quality guide Glazing guide

CHRISTMAS & NEW YEAR HOLIDAY CLOSURE: All Retrofit branches will be closed from 12pm Friday 20th December, returning Monday 13th January. Have a safe & happy holidays!
SUMMER PROMOTION - Get a FREE UPGRADE on your Retrofit Double Glazing quote. Use promo code: FREEUPGRADE25. Request your free quote here. Terms apply.