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2019 – May

The following updates to the NZ Metal Roof and Wall Cladding Code Practice (COP), are effective 1 May 2019.

Important updates:

The main clause Roof Ventilation was renamed Internal Moisture and completely revised and updated. The revised clause recommends designing and installing roof cladding to allow natural ventilation in residential buildings and requires design to enable ventilation in skillion, sarked, and low-pitched residential roofs.

 

Summary of other changes in this update

  • The main clause Installation was revised and updated for clarity.
  • Some clauses from Site Practice were moved to be included in the more relevant clause Installation. Site Practice now contains mainly Safety.
  • Some clauses in Testing were renamed and renumbered to fix broken links and reflect content more accurately. A major revision of Testing is underway. 
  • Other changes are Category 1 updates, which fixed minor errata such as grammar, spelling, and layout.

Revision Detail - 2019 - May

CategoryClause Number (at time of update)Clause (As of current publication)Details
2 - Editing and rearrangement2.1Definitions Updated Glossary to include the terms: "Square Stopping".
2 - Editing and rearrangement3.5.4Load Distribution Minor edit to drawing (Deflection and the Square of Depth )
1 - Minor Errata3.12.1.1Steel Purlins Thinner Than 1 mm Edited for Consistency – changed 1.1 mm to 1 mm.
1 - Minor Errata4.1NZBC Clause B2 (Extract) Revised for clarity.
1 - Minor Errata4.1.1B2 Objective Reformatting
1 - Minor Errata4.1.2B2 Functional Requirements Reformatting
1 - Minor Errata4.1.3Performance Requirements Reformatting
2 - Editing and rearrangement4.11.6Capillary Action Changed minimum cover in Capillary Action End Lap Detail to closer reflect MRM recommendations and renamed the drawing.
1 - Minor Errata5.3.2.3Method 2: Gutter and Downpipe Capacity Determined by Calculations Fixed broken link to Standard Gutter Capacity and Standard Down Pipe Capacity, and rewrote link copy for greater clarity.
2 - Editing and rearrangement8.9.1Flashing Expansion First line revised for clarity.
2 - Editing and rearrangement10Internal Moisture Clause renamed to Internal Moisture.

 

Clause revised for clarity.

 

2 - Editing and rearrangement10.1Minimising Ingress of Water Vapour into the Ceiling Cavity Clause renamed and revised for clarity.
4 - Clause Inserted10.1.1E3 Objective New Clause
4 - Clause Inserted10.1.2E3 Functional Requirements New Clause created
4 - Clause Inserted10.1.3E3 Performance Requirements New clause created.
4 - Clause Inserted10.2Why Manage Internal Moisture Newly created clause
2 - Editing and rearrangement10.4Special Requirements Clause revised for clarity and relevance.
0 - Clause Removed10.4The External Environment Clause removed, information has been revised and moved to other main clauses.
2 - Editing and rearrangement10.5Condensation Clause completely rewritten.
2 - Editing and rearrangement10.6Building Airtightness Clause completely rewritten.
0 - Clause Removed10.6.1Natural Ventilation Clause removed. New drawings used in more relevant clauses.
4 - Clause Inserted10.7Insulation Newly created clause.
4 - Clause Inserted10.7.1Insulation Position Newly created clause
4 - Clause Inserted10.7.2Other Insulation Newly created clause
0 - Clause Removed10.7.4.1Direction of Lay Clause delted. Information is now discussed in Horizontal laying and Vertical laying.
0 - Clause Removed10.7.5Non-Residential Buildings Clause removed. Information is discussed elsewhere.
2 - Editing and rearrangement10.8Climate Clause revised for clarity.
0 - Clause Removed10.8Wall Underlay Clause removed and content discussed i other relevant clauses.
4 - Clause Inserted10.8.1Humidity Relative humidity (RH, given in per cent [%]), is the most widely known method: It gives the content of water vapour in the air relative to the maximum amount of water this parcel of air can hold at its present temperature.

 

Other measures are absolute humidity and water vapour pressure.

2 - Editing and rearrangement10.9Moisture Sources Renamed and revised clause for clarity. Lead clause for various "Sources of Internal Moisture"
4 - Clause Inserted10.9.1Occupant Behaviour Newly created clause, combining new information with some from revised "Managing Water Vapout at the Source" (renamed Sources of Internal Moisture).
4 - Clause Inserted10.9.2Heating Newly created clause
2 - Editing and rearrangement10.9.4Construction Moisture Clause revised for clarity.
4 - Clause Inserted10.9.5Ground Moisture Newly created clause
2 - Editing and rearrangement10.11Ventilation Pathways Clause revised for clarity.
4 - Clause Inserted10.11.1Types of Ventilation Newly created clause
4 - Clause Inserted10.11.1.1Soffit Vents Newly created clause.
4 - Clause Inserted10.11.1.2Fascia Vents Newly created clause
4 - Clause Inserted10.11.1.3Ridge Vents Clause renamed and revised for clarity.
2 - Editing and rearrangement10.11.1.4Turbine Vents Clause revised for clarity.
4 - Clause Inserted10.11.2Battens Newly Created clause.
2 - Editing and rearrangement10.12Underlay Clause revised and expanded for clarity.
4 - Clause Inserted10.12.1Underlay Requirements Newly created clause.
2 - Editing and rearrangement10.12.2Types Of Underlay Clause revised for clarity.
4 - Clause Inserted10.12.3Underlay Usage Clause revised for clarity.
2 - Editing and rearrangement10.12.4Underlay Durability Clause revised and expanded.
2 - Editing and rearrangement10.12.5Installing Underlay Clause revised and expanded.
4 - Clause Inserted10.12.5.1Horizontal Laying Newly created clause.
4 - Clause Inserted10.12.5.2Vertical Laying Newly created clause.
2 - Editing and rearrangement10.12.5.3Underlay Support Clause revised.
2 - Editing and rearrangement10.13Additional Information Clause renamed to Additional Information.
2 - Editing and rearrangement10.13.1Cold Roofs Clause revied for clarity.
2 - Editing and rearrangement10.13.2Warm Roofs Clause revised for clarity.
2 - Editing and rearrangement10.13.3Night Sky Radiation Clause revised for clarity.
2 - Editing and rearrangement10.13.4The Mechanics of Condensation Clause revised and renamed, it is now: The Mechanics of Condesation.
4 - Clause Inserted10.13.5Underlay Stanards Newly created clause.
4 - Clause Inserted10.13.6Relative Humidity Newly created clause
4 - Clause Inserted10.13.7Absolute Humidity Newly created clause
4 - Clause Inserted10.13.8Water Vapour Pressure Newly created clause
2 - Editing and rearrangement13.2Roof Access During Construction Clause movved to Safety
0 - Clause Removed13.4Acceptance Of Materials class="views-field views-field-field-revision-message-revision-id">
0 - Clause Removed13.4.1Presence Of Moisture Between Sheets Clause combined with Wet Storage Damage
0 - Clause Removed13.4.2Colour Match Clause combined with Colour Matching Paint
0 - Clause Removed13.4.3Storage Stain Clause removed.
0 - Clause Removed13.5Roof Loading Clause combined with Unloading
2 - Editing and rearrangement14Installation Clause revised for clarity.
2 - Editing and rearrangement14.1Pre- Installation Clause revised for clarity.
2 - Editing and rearrangement14.1Overhang Clause revised for clarity
0 - Clause Removed14.1Metal Roof Defects Clause removed. See Roof Cladding Damage
0 - Clause Removed14.1.5Cutting And Drilling Clause deleted. Information was spread through other clauses, mainly Swarf Damage
4 - Clause Inserted14.2Product Selection Newly Created Clause
2 - Editing and rearrangement14.2Completion Clause revised for clarity.
4 - Clause Inserted14.2.1Measuring Newly created clause
0 - Clause Removed14.2.1Swarf Removal clause removed, subject is now discussed in Preventing Swarf Damage.
4 - Clause Inserted14.2.2Ordering Newly created clause.
2 - Editing and rearrangement14.2.3Transportation Clause revised for clarity and moved to Installation.
4 - Clause Inserted14.3Accepting Delivery New created clause, combining Acceptance of Materials, previously in Site Practice.
4 - Clause Inserted14.3.1Unloading Newly created clause
0 - Clause Removed14.3.1Primary Fasteners Clause removed. Information is now discussed in various shorter and newly created clauses.
4 - Clause Inserted14.3.2Wet Storage Damage Newly created clause
014.4Secondary Fasteners class="views-field views-field-field-revision-message-revision-id">
0 - Clause Removed14.4.2Monel Rivets clause removed, information is now discussed in other clauses.
0 - Clause Removed14.4.3Aluminium Rivets Clause removed, information now in Rivets
0 - Clause Removed14.4.4Stainless Steel Rivets Clause deleted. See Rivets
0 - Clause Removed14.4.6Fastener Frequency Clause removed. See Fastener Spacing
2 - Editing and rearrangement14.5Handling Clause revised for clarity and moved to Installation.
0 - Clause Removed14.5.2Pan Fixing Clause Removed. See Screws
0 - Clause Removed14.5.3Expansion Fixings Clause removed. See Fastener Allowance for Expansion
0 - Clause Removed14.5.4Lap Stitching Clause removed. Information absorbed in other clauses.
2 - Editing and rearrangement14.6Walking On Roofs Clause revised for clarity and moved to Installation.
0 - Clause Removed14.6Installation Empty heading removed. See Driving.
4 - Clause Inserted14.6.1Footwear Newly created clause
2 - Editing and rearrangement14.7Strippable Films Clause revied for clarity.
0 - Clause Removed14.7Re-Roofing Clause removed. Information absorbed in other clauses.
4 - Clause Inserted14.7.1Storing Product with Strippable Film Newly created clause
2 - Editing and rearrangement14.8Setting Out Clause revised for clarity.
0 - Clause Removed14.8.2Side Lap Fixing Between Purlins Clause removed.
0 - Clause Removed14.8.6Purlin Protection clause removed
0 - Clause Removed14.8.7Drainage Clause removed
0 - Clause Removed14.8.8Condensation Clause removed.
4 - Clause Inserted14.9Marking and Cutting Newly created clause
2 - Editing and rearrangement14.11Sealing and Joining Clause revised for clarity
4 - Clause Inserted14.11.1Sealing End Laps Newly created clause
2 - Editing and rearrangement14.12Fasteners Clause revised for clarity.
014.12.1Nails class="views-field views-field-field-revision-message-revision-id">
2 - Editing and rearrangement14.12.2Screws Clause revised for clarity.
4 - Clause Inserted14.12.3Clip Fasteners Newly created clause.
2 - Editing and rearrangement14.12.4Rivets Clause revised for clarity
2 - Editing and rearrangement14.13Fastener Installation Clause renamed and revised for clarity.
2 - Editing and rearrangement14.13.1Fastener Spacing Newly created clause
4 - Clause Inserted14.13.2Fastener Placement Newly created clause
4 - Clause Inserted14.13.3Fastener Seating Newly created clause
4 - Clause Inserted14.13.4Fastener Allowance for Expansion Newly created clause
4 - Clause Inserted14.14Modes Of Fastener Failure Clause revised for clarity
4 - Clause Inserted14.15Stopends Clause revised for clarity.
2 - Editing and rearrangement14.16Turn-Downs (Drip Forming or Drip Edging) Clause revised for clarity.
4 - Clause Inserted14.17Soft edging and Flashing Newly created clause
4 - Clause Inserted14.18Pre-Empting Problems Newly created clause heading
2 - Editing and rearrangement14.18.1Roof Cladding Damage Clause revised for clarity and moved to Installation
4 - Clause Inserted14.18.2Water Ponding Newly created clause
4 - Clause Inserted14.18.3Correctly Installed Gutters Newly created clause
014.18.4Swarf class="views-field views-field-field-revision-message-revision-id">
4 - Clause Inserted14.18.4.1Identifying Swarf Stains Newly created clause
4 - Clause Inserted14.18.4.2Preventing Swarf Damage Newly created clause
4 - Clause Inserted14.18.4.3Swarf Effect on Performance Newly created clause.
2 - Editing and rearrangement14.18.4.4Repairing Swarf Damage Clause revised for clarity and renamed.
4 - Clause Inserted14.18.4.5Severe or Extensive Swarf Staining Newly created clause.
4 - Clause Inserted14.18.5Colour Matching Paint Newly created clause
4 - Clause Inserted14.18.6Field Painting Newly created clause.
4 - Clause Inserted14.18.7Sunscreen Newly created clause.
4 - Clause Inserted14.18.8Removing Lichen Newly created clause.
2 - Editing and rearrangement14.21Tools Of The Trade Claused revised for clarity.
4 - Clause Inserted14.21.1Spacing Clause removed. See Fastener Spacing
4 - Clause Inserted14.22.1Crest Fixing Clause removed. See Screws
4 - Clause Inserted14.23Tools Clause removed. See Screws
4 - Clause Inserted14.24Translucent Sheeting Clause removed.
4 - Clause Inserted14.24.1Side-Lap Fixing Clause removed.
4 - Clause Inserted14.24.2End Laps Clause deleted.
4 - Clause Inserted14.24.3Midspan Supports Clause removed
4 - Clause Inserted14.24.4Stopends Clause removed.
4 - Clause Inserted14.24.5Pitch Clause removed.
2 - Editing and rearrangement17Testing Edited for clarity.
2 - Editing and rearrangement17.1Scope Clause revised for clarity
1 - Minor Errata17.1.2Resistance to point load Fixed typos – "serviceability" and "strength".
2 - Editing and rearrangement17.2Background to Scope Heading changed from "Commentary on 16.1" and clause revised for clarity and brevity.
4 - Clause Inserted17.4Commentary On 16.3 Clause removed
2 - Editing and rearrangement17.5Determining Wind load Span Graphs Minor grammatical edits and clause renamed to "Determining Wind Load Span Graphs" to avoid confusion with Wind Load Span Graphs.
1 - Minor Errata17.6Specific Methods Of Testing Sheet Roof And Wall Cladding Clause moved (renumbered) to follow Wind and Point Load Testing.
4 - Clause Inserted17.7.1Commentary On Section 15.5 Clause Removed. Testing to undergo major revision.
2 - Editing and rearrangement17.9Background to wind load testing Renamed "Clause from Commentary on 16.6".
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/cop/revision-history/2019-may
Revision Category: 
4 - Clause Inserted
Revision Detail: 

Summary of Changes – May 2019