Testing & Compliance

Testing & Compliance

Metro Performance Glass testing and compliance

The performance specifications require that insulated glass units have a minimum design life of 25 years. Metro Glass manufacturing sites are subject to regular and independent testing of insulated glass units to the BS EN 1279-2 in accordance with the Insulated Glass Units Manufacturing Association (IGUMA) rules inclusive of long-term tests. Although this process is considered a good indicator of long term durability, the Metro Glass warranty is limited to 10 years.

Our manufacturing sites across New Zealand are licensed producers of insulated glass and safety glass products in compliance with the BS EN 1279, AS/NZS 2208 standards respectively and are independently audited.

  • Single and laminated glass processing is undertaken in compliance to AS/NZS 4667:2000

  • Toughened and laminated is undertaken in compliance AS/NZS 2208:1996

  • Insulated Glass and glazing (BS EN1279 ) is undertaken in compliance to the NZS 4223, parts 1-4 Design, Glass Selection and Installation.

Metro frameless glass testing and compliance


Metro Frameless Glass conducts a comprehensive testing program, utilising independent testing laboratories and/or independent witnesses from experienced third-party consulting engineers.


The producer statement system is intended to provide Building Consent Authorities (BCA’s) with reasonable grounds for the issue of a Building Consent or a Code Compliance Certificate, without having to duplicate design or construction checking undertaken by others. 

Testing & Compliance Manual

Guide to visual quality of glass in residential buildings

  • The Window and Glass Association (WGANZ) has recently updated their guidance document to provide information for the assessment of glass in all buildings. The statements and tolerances are based on a mix of the applicable standards and best industry practice.

  • There is also a link within the Window and Glass Association document to a guide (tolerances, materials and workmanship) released in 2015 by the Ministry of Business, Innovation and Employment (MBIE) intended to provide assistance to contractors and homeowners who may be unsure of what constitutes a defect for the purposes of the Building Act 2004.

NZ Guide to visual quality - 2023

WGANZ Glazing Decision Tree

The glazing decision tree from the Window and Glass Association (WGANZ), has been developed to assist you in identifying the appropriate glass to use based on Human Impact Safety Glazing NZS 4223.3:2016 effective from 30 May 2017.

Glazing Decision Tree (WGANZ)

You can download a free copy of the Human Impact Safety Standard 4223.3:2016 here.

Human Impact Safety Standard

Standards New Zealand - free building related downloads

Some building related standards have recently been sponsored and are available for free from Standards New Zealand.

Standards NZ Free Standards

Producer statements (PS1's)

To view or request a PS1 from Metro Glass please click here.

PS1 Information

Explore Metro's advanced Low E double or triple glazing range for superior performance. Contact us today to discuss the ideal glass solution for your project on 0800 545 800