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.
In a major update, effective 1 November 2022, the Clause 15.5 – previously 'Insulated Panels' – has been revised and extended.
The main clause has been renamed 15.5 Warm Roofs, and it now includes sub-clauses dealing with 15.5.1 Insulated Panels 15.5.2 Composite Systems and 15.5.3 Spray-On Systems.
Other notable updates include:
- Changed recommendations for 5.5.6 Asymmetrical Valleys.
- Changed recommendations for 15.4.8 Standing Seam Roofing Wind Loads to minimise wind noise.
- The performance requirements quoted from 5.1 NZBC: Clause E1 — Surface Water has been expanded to better reflect the intent of NZBC E1 — Surface Water.
- The 3.6.2.2B Altitudes for Snow Loading Design was renamed to remove ambiguity.
- Roofing products with adhered absorbent fleece were added to 10.10 Ventilation Pathways.
- 15.4.10 Tray Roof Flashing details added to 15.4 Tray Roofing.
The rest of the updates consist of minor edits for clarity and layout.
19.3A Revision Detail - 2022 - November
| Category | Clause Number (at time of update) | Clause (As of current publication) | Details |
|---|---|---|---|
| 2 - Editing and rearrangement | 1 | 1 Introduction | Updated Revisions Message |
| 2 - Editing and rearrangement | 3.8 | 3.6.2.2 Snow Loads | Table 3.6.2.2B Altitudes for Snow Loading Designn was renamed to remove ambiguity. |
| 1 - Minor Errata | 3.15 | 3.4 Profiles | Renamed Tray/Deck profiles to Standing Seam/Tray Profiles. |
| 1 - Minor Errata | 5.1 | 5.1 NZBC: Clause E1 — Surface Water | Expanded performance requirement in accordance with E1– Surface Water. |
| 3 - Substantial change to recommendation | 5.4.6 | 5.5.6 Asymmetrical Valleys | Changed recommendation in line with the most recent 5.5.7 Valley Capacity Calculator. |
| 2 - Editing and rearrangement | 10.1 | 10.10 Ventilation Pathways | Added fleece lined products. |
| 1 - Minor Errata | 12.1.1 | 12.1.1 Wind Noise | Added recommendation to reduce Underlay Flutter, by adding spray-on foam insulation. |
| 2 - Editing and rearrangement | 15.3.2 | 15.3.2 Valleys | Updated Reference to 5.5.7 Valley Capacity Calculator |
| 2 - Editing and rearrangement | 15.4.6 | 15.4.7 Tray Ventilation | Replaced 15.4.7A Standing Seam Ventilation with better quality image. |
| 3 - Substantial change to recommendation | 15.4.7 | 15.4.8 Standing Seam Roofing Wind Loads | Change in recommendation. |
| 4 - Clause Inserted | 15.4.10 Tray Roof Flashing | Newly created clause. | |
| 3 - Substantial change to recommendation | 15.5 | 15.5 Warm Roofs | The main clause Insulated Panels have been renamed Warm Roofs. In addition to insulated panels, the clause also features composite roofs and spray-on systems. |
| 2 - Editing and rearrangement | 15.5.1 | 15.5.1.1 Insulated Panel Manufacturing | The clause Design under Insulated Panels has been comprehensively reviewed and edited. It is now called Insulated Panel manufacturing. The rest of the content is available in smaller sub-clauses throughout the new clause 15.5.1 Insulated Panels. |
| 4 - Clause Inserted | 15.5.1 Insulated Panels | Newly created clause for Insulated Panels. | |
| 4 - Clause Inserted | 15.5.1.2 Insulated Panel Composition | Newly created clause. | |
| 4 - Clause Inserted | 15.5.1.3 Insulated Panel Face Profiles | Newly created clause. | |
| 4 - Clause Inserted | 15.5.1.6 Insulation Panel Insulation Values | Newly created clause. | |
| 4 - Clause Inserted | 15.5.1.8 Natural Lighting for Insulated Panels | Newly created clause. | |
| 4 - Clause Inserted | 15.5.1.11 Insulated Panels Fitness for Purpose | Newly created clause. | |
| 4 - Clause Inserted | 15.5.1.12 Insulated Panel Installation | Newly created clause. | |
| 4 - Clause Inserted | 15.5.1.13 Insulated Panel Installation Safety | Newly created clause. | |
| 4 - Clause Inserted | 15.5.1.15 Insulated Panel Penetrations | Newly created clause. | |
| 4 - Clause Inserted | 15.5.1.17 Insulated Panel End Laps | Newly created clause. | |
| 2 - Editing and rearrangement | 15.5.2 | 15.5.1.4 Insulated Panel Face Materials | The clause has been comprehensively reviewed and edited. |
| 4 - Clause Inserted | 15.5.2 Composite Systems | Newly created clause. | |
| 4 - Clause Inserted | 15.5.2.1 Composite Systems Composistion | Newly created clause. | |
| 4 - Clause Inserted | 15.5.2.2 Composite System Installation | Newly created clause. | |
| 2 - Editing and rearrangement | 15.5.3 | 15.5.1.5 Insulated Panel Core Materials | The clause has been comprehensively reviewed and edited. |
| 4 - Clause Inserted | 15.5.3 Spray-On Systems | Newly created clause. | |
| 4 - Clause Inserted | 15.5.3.1 Ventilation of Spray-on Systems | Newly created clause. | |
| 2 - Editing and rearrangement | 15.5.4 | 15.5.1.7 Insulation Panel Structure | This clause has been comprehensively reviewed and edited. |
| 2 - Editing and rearrangement | 15.5.4.1 | 15.5.1.14 Insulated Panels Supporting Structure | The clause has been comprehensively reviewed and renamed. |
| 0 - Clause Removed | 15.5.5 | Thermal | Clause was removed during the revision of Insulated Panels. |
| 0 - Clause Removed | 15.5.5.1 | Fire | Clause was removed during a revision of Insulated Panels. |
| 2 - Editing and rearrangement | 15.5.6 | 15.5.1.10 Insulated Panels and Internal Moisture | This clause has been comprehensively reviewed and renamed. |
| 2 - Editing and rearrangement | 15.5.7 | 15.5.1.9 Insulated Panel Acoustics | This clause has been comprehensively reviewed and edited. |
| 3 - Substantial change to recommendation | 15.5.8 | 15.5.1.16 Fixing Insulated Panels | This clause has been comprehensively revised and renamed. |
| 2 - Editing and rearrangement | 15.5.9 | 15.5.1.18 Insulated Panel Flashings | This clause has been comprehensively revised and renamed. |
| 2 - Editing and rearrangement | 17.3 | 17.3 MRM Soft Edge Standard | Editing for clarity. |
| 4 - Clause Inserted | 19.3 2022 – November | Revision summary for the November 2022 update. |