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2021 – December

The following revisions to the NZ Metal Roof and Wall Cladding Code of Practice were published on 1 December 2021.

Summary of Changes in this update:

The rest of this update comprises minor edits and fixes.

Revision Detail - 2021 - December

CategoryClause Number (at time of update)Clause (As of current publication)Details
3 - Substantial change to recommendation3.17.1Corrugated Steel – 0.40 Drawing edited to change C2 recommendation to stay below Very High.
3 - Substantial change to recommendation3.17.2Corrugated Steel – 0.55 Changed recommendation for C2, to only be used below Very High Wind Zones.
3 - Substantial change to recommendation4.10.3Solar Collectors and Other Roof Mounted Structures Clause has been completely revised.
3 - Substantial change to recommendation8.8Flashing Buckling Changed recommended minimum moisture content to 12% following advice from Scion .
3 - Substantial change to recommendation12.1Roof Noise This clause has been substatially revised. Some-subsections have been promoted to headings and some had been deleted a part of the revision.
4 - Clause Inserted Wind Noise New clause, raised and revised from former sub-sub clause of Roof Noise.
4 - Clause Inserted Precipitation Noise Newly created clause from the revised Roof Noise.
4 - Clause Inserted Thermal Noise New clause, information elevated from the revised Roof Noise.
4 - Clause Inserted 2021 – December Revision message for the 1 December 2021 Update.
2 - Editing and rearrangement1Introduction Update Revisions Message
2 - Editing and rearrangement5.3.7Gutter Capacity Calculator All calculators now require input of both 50 year and 10 year ARI.
2 - Editing and rearrangement5.4.7Valley Capacity Calculator All calculators now require input of both 50 year and 10 year ARI.
2 - Editing and rearrangement5.6.3Downpipe Capacity Calculator All calculators now require input of both 50 year and 10 year ARI.
2 - Editing and rearrangement5.7.1Maximum Area Above Spreader Calculator All calculators now require input of both 50 year and 10 year ARI.
2 - Editing and rearrangement7.1.4Maximum Run Calculator All calculators now require input of both 50 year and 10 year ARI.
2 - Editing and rearrangement9.4.4Maximum Area Above Penetration Calculator All calculators now require input of both 50 year and 10 year ARI.
1 - Minor Errata1.3Standards and Related Documents Fixed column spacing.
1 - Minor Errata2.1Definitions Clarified definitions for tray, trough, standing seam, and secret fixed profiles.
1 - Minor Errata3.6.2Roof Traffic Changed "trademan" to trades people for gender neutrality.
1 - Minor Errata3.18G550 Steel Cladding Fastening Pattern Tables Fixed grammar for consistency. Fixed drawings to show C2 fastening pattern.
2 - Editing and rearrangement4.6.2Environmental Guides Envrinmental guides redone for improved display on all browers.
1 - Minor Errata15.1Curved Roofs Grammar fix.
1 - Minor Errata16.8Overpainting slight formatting change for improved reading.
(optional caption)
Clause: 
019_011_000_000_000_000_000_000_000
Clause Number: 
19.11
/cop/revision-history/2021-december
Revision Category: 
4 - Clause Inserted
Revision Detail: 

Revision message for the 1 December 2021 Update.