NZ Metal Roofing Manufacturers

In 2023, BlueScope announced that New Zealand Steel is to build an electric arc furnace (EAF) to secure the future of lower GHG emission steelmaking at Glenbrook Steelworks

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"A global agenda for change" - this was what the World Commission on Environment and
Development was asked to formulate.

It was an urgent call by the General Assembly of the United Nations.

Using New Zealand sourced and formed steel cladding for your house, warehouse or factory, you can be confident it adds to the overall sustainability of your project.

Using the load/span fixing patterns in E2/AS1, where reduced end spans are not applied, will still comply with the performance requirements of NZBC B1-Structure.

17 October 2025, Version 1

bwls01_end_spans_of_roofing_sheets.pdf

Regular cleaning and annual inspections are essential to improve the durability and performance of metal roof and wall cladding.

31 May 2024, Version 1

bi01_the_importance_of_maintenance.pdf

Cavity battens under E2/AS1 are primarily for drainage with limited ventilation. Using thicker (45 mm) battens instead of standard 18–25 mm ones can still meet NZBC E2 performance as an equivalent solution.

2 April 2024, Version 1

Cavity_Battens_Thicker_Than_25_mm.pdf

Guidance on managing rust on change-of-pitch flashings.

28 October 2025, Version 1

bemf01_change_of_pitch_flashing.pdf

Recommendation for designing wide Over-flashings behind penetrations.

6 October 2025, Version 1

bpd01_wide-over_flashings_behind_penetrations.pdf

Advice and explanation for underlay failure.

11 November 2025, Version 1

bu02_oversaturation_of_underlay.pdf

Assist installers and builders, in understanding the necessary guidelines and steps for preparing and installing fascias, gutters and downpipes, to comply with the performance requirements of the NZ Building Code and aesthetic requirements.
This document will include how to:
• Outline...