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 5.4.6 Asymmetrical Valleys.
- Changed recommendations for 15.4.7 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 3.8B Altitudes for Snow Loading Design was renamed to remove ambiguity.
- Roofing products with adhered absorbent fleece were added to 10.10 Ventilation Pathways.
- 126.96.36.199 Standing Seam Flashing details added to 15.4 Standing Seam Cladding.
The rest of the updates consist of minor edits for clarity and layout.
|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||3.8 Snow Loads||Table 3.8B Altitudes for Snow Loading Designn was renamed to remove ambiguity.|
|1 - Minor Errata||3.15||3.15 Profile Shape||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||5.4.6 Asymmetrical Valleys||Changed recommendation in line with the most recent 5.4.7 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 5.4.7 Valley Capacity Calculator|
|2 - Editing and rearrangement||15.4.6||15.4.6 Standing Seam Ventilation||Replaced 15.4.6A Standing Seam Ventilation with better quality image.|
|3 - Substantial change to recommendation||15.4.7||15.4.7 Standing Seam Roofing Wind Loads||Change in recommendation.|
|4 - Clause Inserted||188.8.131.52 Standing Seam 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||184.108.40.206 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||220.127.116.11 Insulated Panel Composition||Newly created clause.|
|4 - Clause Inserted||18.104.22.168 Insulated Panel Face Profiles||Newly created clause.|
|4 - Clause Inserted||22.214.171.124 Insulation Panel Insulation Values||Newly created clause.|
|4 - Clause Inserted||126.96.36.199 Natural Lighting for Insulated Panels||Newly created clause.|
|4 - Clause Inserted||188.8.131.52 Insulated Panels Fitness for Purpose||Newly created clause.|
|4 - Clause Inserted||184.108.40.206 Insulated Panel Installation||Newly created clause.|
|4 - Clause Inserted||220.127.116.11 Insulated Panel Installation Safety||Newly created clause.|
|4 - Clause Inserted||18.104.22.168 Insulated Panel Penetrations||Newly created clause.|
|4 - Clause Inserted||22.214.171.124 Insulated Panel End Laps||Newly created clause.|
|2 - Editing and rearrangement||15.5.2||126.96.36.199 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||188.8.131.52 Composite Systems Composistion||Newly created clause.|
|4 - Clause Inserted||184.108.40.206 Composite System Installation||Newly created clause.|
|2 - Editing and rearrangement||15.5.3||220.127.116.11 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||18.104.22.168 Ventilation of Spray-on Systems||Newly created clause.|
|2 - Editing and rearrangement||15.5.4||22.214.171.124 Insulation Panel Structure||This clause has been comprehensively reviewed and edited.|
|2 - Editing and rearrangement||126.96.36.199||188.8.131.52 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||184.108.40.206||Fire||Clause was removed during a revision of Insulated Panels.|
|2 - Editing and rearrangement||15.5.6||220.127.116.11 Insulated Panels and Internal Moisture||This clause has been comprehensively reviewed and renamed.|
|2 - Editing and rearrangement||15.5.7||18.104.22.168 Insulated Panel Acoustics||This clause has been comprehensively reviewed and edited.|
|3 - Substantial change to recommendation||15.5.8||22.214.171.124 Fixing Insulated Panels||This clause has been comprehensively revised and renamed.|
|2 - Editing and rearrangement||15.5.9||126.96.36.199 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||19.1 2022 – November||Revision summary for the November 2022 update.|