Code of Practice v3.0 Online
The NZ Metal Roof and Wall Cladding Code of Practice is a comprehensive design & installation guide, and a recognised related document for Acceptable Solution E2/AS1 of the NZ Building Code.
The NZ Metal Roof and Wall Cladding Code of Practice is a comprehensive design & installation guide, and a recognised related document for Acceptable Solution E2/AS1 of the NZ Building Code.
The following revisions to the NZ Metal Roof and Wall Cladding Code of Practice were published on 1 March 2023.
Substantial changes to recommendations:
Editing and rearrangement:
Other changes consisted of small fixes for clarity and grammar.
Category | Clause Number (at time of update) | Clause (As of current publication) | Details |
---|---|---|---|
3 - Substantial change to recommendation | 5.3.7 | 5.4.7 Gutter Capacity Calculator | Gutter Capacity Calculator now supports calculation where gutter fall is greater than 1:100, and has an option for Secret Gutters (i.e. where a roof slopes towards a raking wall or barge). |
3 - Substantial change to recommendation | 7.1.1 | 7.1.1 Minimum Roof Cladding Pitch | Revised and renamed table 7.1.1A Minimum Pitch for Generic Metal Roofing. |
4 - Clause Inserted | 5.2 Roof Drainage Terminology | New clause to clarify COP usage of terminology pertaining to Roof Drainage. | |
4 - Clause Inserted | 5.3.2.1 Designing for Climate Change | Newly introduced clause, recommending NIWA's HIRDS-tool. | |
4 - Clause Inserted | 5.4.1.1 Bay Windows | New clause discussing drainage for Bay Windows. | |
4 - Clause Inserted | 5.4.1.2 Outbuildings | New clause to give guidance on roof drainage for outbuildings. | |
2 - Editing and rearrangement | 1 | 1 Introduction | Updated Revisions Message |
2 - Editing and rearrangement | 2.1 | 2.1 Definitions | Added definitions for Freeboard, Internal gutter, Hidden gutter, Secret gutter, and Raking Spouting. |
1 - Minor Errata | 3.5.2 | 3.5.2 Wind Load | Fixed broken link. |
2 - Editing and rearrangement | 5.3.5.1 | 5.4.5.1 Internal Gutter Design Features | Added clarifying text regarding scuppers. |
2 - Editing and rearrangement | 5.4.6 | 5.5.6 Asymmetrical Valleys | Included details drawing for installing a . |
2 - Editing and rearrangement | 8.3 | 8.3 Flashing Cover | Added clarification of rib cover to 8.3K Apron Flashing Cover — Trapezoidal. |
2 - Editing and rearrangement | 8.4.2 | 8.4.2 Barge And Verge | Added illustrations showing details for:8.4.2B Stepped Fascia Corrugate Under Barge; 8.4.2C Stepped Fascia Corrugate Over Barge; 8.4.2D Stepped Fascia Trapezoidal Under Barge; 8.4.2E Stepped Fascia Trapezoidal Over Barge; and 8.4.2F Tray Roofing-Wall Connection. |
2 - Editing and rearrangement | 8.4.4 | 8.4.4 Apron Flashings | Added illustration showing 8.4.4H Parapet Flashing, Chase Cut and 8.4.4I Parapet Flashing, Face Fixed. |
1 - Minor Errata | 14.16 | 14.16 Stop-ends | Minor edit for clarity. |
2 - Editing and rearrangement | 14.17 | 14.17 Turndowns (Drip Forming or Drip Edging) | Edited copy to provide guidance for difficult to turn down profiles, such as deep corrugated profiles. |
4 - Clause Inserted | 19.1 2023 – March | Revision and updates active 1 March 2023. |