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 (COP) is published by NZ Metal Roofing Manufacturers Inc. (MRM), to provide:
- acceptable trade practice for the fixing of metal roof and wall cladding and accessories.
- prescriptive detailing for designers and sets a benchmark for the standard of detailing and workmanship required over and above that required to comply with the NZBC.
The COP does not describe or dismiss alternative methods, which may need specific acceptance by the Building Consent Authorities.
It is published in accordance with current technology, materials, and building codes. The COP will be periodically updated to reflect changes in legislation and standards or improvements in technology and available materials.
The most current Code of Practice is available on the MRM website, www.metalroofing.org.nz/cop, as Code of Practice Online (MRM COP Version 3).
The most recent Update to the COP was on 1 March 2021.
The addition of an interactive calculator for asymmetrical valleys constitutes the most important inclusion in this update.
The other capacity calculators have all been refined and positioned for improved usability.
|Gutter Capacity||5.3.6 Gutter Capacity Calculator|
|Valley Capacity (both symmetrical and asymmetrical)||5.4.7 Valley Capacity Calculator|
|Downpipe Capacity||5.6.3 Downpipe Capacity Calculator|
|Maximum Area Above Spreaders||5.7.1 Maximum Area Above Spreader Calculator|
|Maximum Area Above Penetrations||9.4.4 Maximum Area Above Penetration Calculator|
|Maximum Run||7.1.4 Maximum Run Calculator|
In addition, various drawings have been updated for accuracy and correctness.
The rest of this update consisted of fixing minor errors and improvements for clarity.
For detailed information about the update, see 19.1 2021 – March.