COP v3.0:revision-history; 2020-december

19.3 2020 – December 

The following revisions to the NZ Metal Roof and Wall Cladding Code of Practice were published on 1 December 2020.

Summary of Changes in this update:

We introduced three more responsive tools to aid in roof drainage design. They are:

The rest of this update consisted of fixing minor errors and improvements for clarity.

19.3A Revision Detail - 2020 - December

CategoryClause Number (at time of update)Clause (As of current publication)Details
2 - Editing and rearrangement11 IntroductionUpdate Revisions Message
1 - Minor Errata1.31.3 Standards and Related DocumentsClause renamed.
1 - Minor Errata4.10.14.9.1 Disimilar MetalsFormatting fix.
1 - Minor Errata4.10.34.9.4 Compatibility TableRemoved reference to Butly Rubber into its own clause 4.9.3 Compatibility with Non-Metallic Substances.
2 - Editing and rearrangement4.124.11 Inert CatchmentInserted photo "Localised Damage due to Inert Catchment".
1 - Minor Errata5.2.4.65.4.6 Asymmetrical ValleysPunctuation fix.
2 - Editing and rearrangement5.2.57.1.3 Roof Drainage CapacityClause renamed to more accurately reflect its content.
4 - Clause Inserted5.4.35.7.1 Maximum Area Above Spreader CalculatorNew online tool for calculating maximum drainage areas for spreaders.
1 - Minor Errata5.55.3.2 Gutter Capacity DesignGrammar fix.
2 - Editing and rearrangement5.6.35.2.2 Rainfall IntensityRainfall intensity maps have been added to this clause. Links to rainfall maps have been included in the calculators.
1 - Minor Errata5.6.3.25.2.2.2 Allowance for Short-Term IntensitiesUpdated short-term intensity multiplication factors.
2 - Editing and rearrangement5.75.3.6 Gutter Capacity CalculatorRenamed the clause. Other capacity calculators have been moved closer to the relevant information dealing with each topic.
0 - Clause Removed5.7.1North Island 50-year ARI, 10-minute Rainfall Intensity MapMap moved to 5.2.2 Rainfall Intensity.
0 - Clause Removed5.7.2South Island 50-year ARI, 10-minute Rainfall Intensity MapMap moved to 5.2.2 Rainfall Intensity.
3 - Substantial change to recommendation7.1.27.1.2 RunoffClause completely revised.
4 - Clause Inserted7.1.37.1.4 Maximum Run CalculatorNew online tool to calculate maximum run for drainage of different roofing profiles.
2 - Editing and rearrangement8.4.4.48.4.4.4 Eaves FlashingInserted a paragraph recommending eaves flashings in Marine Environments.
1 - Minor Errata9.4.29.4.2 Curb DesignIntroductory copy added.
4 - Clause Inserted9.4.49.4.4 Maximum Area Above Penetration CalculatorNew online tool for calculating the maximum area above a penetration.
1 - Minor Errata17.2.3.117.2.3.1 Site TestingUpdated the graph.
4 - Clause Inserted 4.9.3 Compatibility with Non-Metallic SubstancesA new clause, previously part of "4.10.3 Compatibility Table". Information was split since this is not part of the table or online tool.
4 - Clause Inserted 5.4.7 Valley Capacity CalculatorNew clause created for Valley Capacity Calculator. The calculator was previously part of Capacity Calculators.
4 - Clause Inserted 5.6.3 Downpipe Capacity CalculatorNew clause for Downpipe Capacity Calculators.
4 - Clause Inserted 19.3 2020 – DecemberNew clause showing updates effective on 1 December 2020.