2021 – September

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

Summary of Changes in this update:

In an important update, the recommendation for freeboard for internal gutters on the Gutter Capacity Calculator was changed to 30mm to align with E1/AS1 and E1/AS2.
The recommendation for minimum suitable pitch for Penetrations Minimum Pitch, has been amended to include modern proprietary profiles.
New clauses with easy-to-use fastener pattern reference tables. The tables would cover most standard corrugated and trapezoidal cladding, for G550 Steel Cladding Fastening Pattern Tables and Aluminium Fastening Pattern Tables.
Other new clauses were for Intersecting Valleys and Double Lapping.
The drawing in Downpipe Spreaders was replaced to give a clearer reflection of the downpipe design and using the online downpipe spreader capacity calculator.

The rest of this update consisted of fixing minor errors.

Category	Clause (As of current publication)	Details
2 - Editing and rearrangement	Introduction	Update Revisions Message
4 - Clause Inserted	G550 Steel Cladding Fastening Pattern Tables	New clause aimed at easy reference of fastening patterns.
4 - Clause Inserted	Aluminium Fastening Pattern Tables	New clause for easy referencing of fastening patterns for aluminium cladding.
1 - Minor Errata	Roof Traffic	Changed "tradesman" to trades people for gender neutrality.
1 - Minor Errata	Uniformly Distributed Load (Wind or Induced Action)	Corrected spelling of "Uniformly. Included a full term before the abbreviation for UDL in the first sentence.
2 - Editing and rearrangement	Internal Corners	Clause moved from Valleys to Gutters.
3 - Substantial change to recommendation	Gutter Capacity Calculator	The minimum Freeboard on internal gutter calculations has been changed to 30mm to align with E1/AS1 and E1/AS2.
1 - Minor Errata	Valley Design	Inserted cross-reference link to Internal Corners.
4 - Clause Inserted	Intersecting Valleys	New clause showing the correct way to intersect valleys.
2 - Editing and rearrangement	Downpipe Spreaders	Replaced Downpipe Spreader Design-drawing with a more detailed one.
3 - Substantial change to recommendation	Penetrations Minimum Pitch	Revised first sentence to make allowance for modern profiles and proprietary profiles.
4 - Clause Inserted	Double Lapping	New clause.
4 - Clause Inserted	2021 – September	New Revision clause

(optional caption)

Clause:

019_010_000_000_000_000_000_000_000

Clause Number:

19.10

/cop/revision-history/2021-september

Revision Category:

4 - Clause Inserted

Revision Detail:

New Revision clause

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