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 following revisions to the NZ Metal Roof and Wall Cladding Code of Practice were published on 1 April 2022.
Change in recommendation:
4.9.1 Dissimilar Metals: Gutters and spouting made from materials which are incompatible with the roof cladding to include special provisions such as a gap between spouting and fascia, using leaf deflectors, and considering low fronted spouting.
Revised clauses:
- 8.3 Flashing Cover: Revision of the minimum requirements for flashing cover in the Metal Roofing Code of Practice. Drawings have been updated and a category C added for SED Wind Zones up to 60 m/s on all pitches.
- 10.10 Ventilation Pathways has completely revised for clarity. The revision includes a new recommendation to provide additional ventilation for trough or tray section roofs.
The rest of the updates consisted of minor changes, editing, and new drawings for 14 Installation, without any changes in recommendations.
19.4A Revision Detail - 2022 - April
| Category | Clause Number (at time of update) | Clause (As of current publication) | Details |
|---|---|---|---|
| 3 - Substantial change to recommendation | 4.9.1, 4.10.1 | 4.9.1 Dissimilar Metals | Change of recommendation for spouting and roof cladding made from incompatible material. |
| 3 - Substantial change to recommendation | 8.3 | 8.3 Flashing Cover | Clause has been completely revised. |
| 3 - Substantial change to recommendation | 10.1 | 10.10 Ventilation Pathways | Clause revised for clarity. |
| 2 - Editing and rearrangement | 1 | 1 Introduction | Update Revisions Message |
| 1 - Minor Errata | 2.1, 2.1 | 2.1 Definitions | Added defintion for SED Wind Zone. |
| 2 - Editing and rearrangement | 3.15, 3.13 | 3.15 Profile Shape | Inserted new Drawing: Profile Types – |
| 2 - Editing and rearrangement | 5.3.7 | 5.4.7 Gutter Capacity Calculator | Enabled Profile Description Field to describe product. |
| 1 - Minor Errata | 5.4.7 | 5.5.7 Valley Capacity Calculator | Standardise internal structure - no user facing or operational changes. |
| 1 - Minor Errata | 5.6.3 | 5.7.3 Downpipe Capacity Calculator | Standardise internal structure - no user facing or operational changes. |
| 2 - Editing and rearrangement | 5.7.1 | 5.8.1 Maximum Area Above Spreader Calculator | Enabled Profile Description Field to describe product. |
| 2 - Editing and rearrangement | 7.1.4 | 7.1.4 Maximum Run Calculator | Enabled Profile Description Field to describe product. |
| 2 - Editing and rearrangement | 8.3.2 | 8.2.1 Flashing Edges | Copy moved from 8.3 Flashing Cover to this clause. |
| 4 - Clause Inserted | 8.3.1 Apron Upstands | New clause created from 8.3 Flashing Cover. | |
| 4 - Clause Inserted | 8.3.2 Clearances | New clause created from 8.3 Flashing Cover. | |
| 4 - Clause Inserted | 8.3.3 Ridging and Other Transverse Flashings | New clause created from 8.3 Flashing Cover. | |
| 1 - Minor Errata | 8.4.4.4 | 8.4.4.4 Eaves Flashing | Corrected reference typo E1/AS1 to E2/AS1. |
| 2 - Editing and rearrangement | 9.4.4 | 9.4.4 Maximum Area Above Penetration Calculator | Enabled Profile Description Field to describe product. |
| 1 - Minor Errata | 10.10.1.2 | 10.10.1.2 Fascia Vents | Grammar fix. |
| 4 - Clause Inserted | 10.10.1.4 Vented Soft Edge | New clause. | |
| 2 - Editing and rearrangement | 10.10.1 | 10.10.1 Methods of Ventilation | Clause renamed. |
| 1 - Minor Errata | 10.10.2 | 10.10.2 Battens | Grammatical fix for clarity. |
| 4 - Clause Inserted | 10.10.3 Applied Fleeces | New Clause. | |
| 2 - Editing and rearrangement | 14.13.2 | 14.13.2 Screws | Updated drawings: 14.13.2D Screw Gauge and 14.13.2E Threads per Inch (TPI). |
| 2 - Editing and rearrangement | 14.16 | 14.16 Stop-ends | Drawings updated: 14.16A Dog-eared Stop-ends, 14.16B Pull-up Stopends, and 14.16C Corrugate Stop-ends. |
| 2 - Editing and rearrangement | 14.17 | 14.17 Turndowns (Drip Forming or Drip Edging) | UPdated drawing: 14.17A Profile Turndown |
| 2 - Editing and rearrangement | 14.19.1 | 14.19.1 Roof Cladding Damage | Drawing updated: 14.19.1A Sealed and Riveted Saddle |
| 2 - Editing and rearrangement | 14.3.1 | 14.3.1 Unloading | Drawing updated: 14.3.1A Sling with Spreader Bar. |
| 2 - Editing and rearrangement | 14.6 | 14.6 Walking On Roofs | Drawings updated: 14.6A Walking in the Pan and 14.6B Spreading Weight over two Ribs. |
| 4 - Clause Inserted | 19.4 2022 – April | Revision message – April 2022. | |