Code of Practice v3.0 Online
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 is a comprehensive design & installation guide, and a recognised related document for Acceptable Solution E2/AS1 of the NZ Building Code.
The following updates to the NZ Metal Roof and Wall Cladding Code Practice (COP), are effective 1 December 2019.
Major Revisions
Summary of other changes in this update
Category | Clause Number (at time of update) | Clause (As of current publication) | Details |
---|---|---|---|
2 - Editing and rearrangement | 1 | 1 Introduction | Update Revisions Message |
2 - Editing and rearrangement | 2.1 | 2.1 Definitions | Revised definition of "Load Spreading Washer", added a new item "Profiled Washer", added definition for "Finial", minor grammatical fixes. |
2 - Editing and rearrangement | 5 | 5 Roof Drainage | The entire Roof Drainage-clause had been revised. |
1 - Minor Errata | 5.1 | 5.1 NZBC: Clause E1 — Surface Water | Formatting |
4 - Clause Inserted | 5.4 Gutters | New clause. | |
4 - Clause Inserted | 5.4.1 External Gutters (Spouting) | New clause. | |
2 - Editing and rearrangement | 5.5.5 | 5.4.4 Concealed Fascia Gutters | This clause had been completely revised and renamed. |
2 - Editing and rearrangement | 5.5.4 | 5.4.5 Internal Gutters | Clause completely revised. |
4 - Clause Inserted | 5.4.5.1 Internal Gutter Design Features | New clause. | |
2 - Editing and rearrangement | 5.6 | 5.5 Valleys | Valleys had been completely revised and divided into smaller, more specific, sections. |
4 - Clause Inserted | 5.5.1 Valley Fixing | New clause. | |
4 - Clause Inserted | 5.5.2 Valley Design | New clause. | |
4 - Clause Inserted | 5.4.3 Internal Corners | New clause. | |
2 - Editing and rearrangement | 5.6.2 | 5.5.3 Bifurcated Valleys | The clause had been revised. Valleys are now discussed in smaller, more specific, clauses. |
4 - Clause Inserted | 5.5.5 Changing Angles in Valleys | New clause. | |
4 - Clause Inserted | 5.5.6 Asymmetrical Valleys | New clause. | |
4 - Clause Inserted | 7.1.3 Roof Drainage Capacity | New clause. | |
3 - Substantial change to recommendation | 5.5.7 | 5.4.6 Secret Gutters | Clause revised, for brevity and clarity. |
4 - Clause Inserted | 5.6 Rainwater Heads, Sumps, and Overflows | New clause. | |
2 - Editing and rearrangement | 5.8.1 | 5.6.1 Rainwater Heads | Clause revised, now providing more information. |
2 - Editing and rearrangement | 5.8 | 5.6.2 Sumps | This clause has been revised. |
2 - Editing and rearrangement | 5.8.2 | 5.6.3 Overflows | Clause renamed, Outlets are now discussed under Outlets and Downpipes. |
4 - Clause Inserted | 5.7 Outlets and Downpipes | New clause. | |
4 - Clause Inserted | 5.7.1 Placement of Downpipes | New clause. | |
4 - Clause Inserted | 5.7.2 Capacity Table for Common Size Downpipes | New clause. | |
2 - Editing and rearrangement | 5.5.1 | 5.4.2 Gutter Capacity Design | Clause has been revised and edited. |
4 - Clause Inserted | 5.4.2.2 Maximum Gutter Length | New clause. | |
2 - Editing and rearrangement | 5.5.2 | 5.4.2.3 Gutter Support Systems | Clause revised. |
4 - Clause Inserted | 14.18.9 Gutter Installation | New clause. | |
2 - Editing and rearrangement | 5.2 | 5.3 Roof Drainage Design | Clause had been completely revised. |
2 - Editing and rearrangement | 5.3.1 | 5.3.1 Catchment Area | Caluse has been completely revised. All calculations are now under a new clause Capacity Calculations. |
2 - Editing and rearrangement | 5.5.8 | 5.4.2.1 Gutter Fall | Clause revised and renamed. |
3 - Substantial change to recommendation | 5.3 | 5.3.2 Rainfall Intensity | Clause had been completely revised, with updated Rainfall Intensity Maps at the end of the main Clause, Roof Drainage. |
4 - Clause Inserted | 5.3.2.3 Allowance for Short-Term Intensities | New clause. | |
4 - Clause Inserted | 5.3.2.2 Duration | New clause | |
2 - Editing and rearrangement | 5.3.2 | 5.4.7 Gutter Capacity Calculator | The old clause, Capacity Calculations, replaced by a new clause of the same name but including new online tools. |
4 - Clause Inserted | 5.7.1 North Island 50-year ARI, 10-minute Rainfall Intensity Map | New clause. | |
4 - Clause Inserted | 5.7.2 South Island 50-year ARI, 10-minute Rainfall Intensity Map | New clause. | |
4 - Clause Inserted | 8.3 | 8.3 Flashing Cover | Adjusted spacing in Table 8.3A |
2 - Editing and rearrangement | 8.4.4.3 | 8.4.4.3 Step Apron | Removed reference to "Fortress Fasteners" in drawing A: Step Apron Details. |
4 - Clause Inserted | 8.4.4.4 | 8.4.4.4 Eaves Flashing | Drawing 8.4.4.4A renamed to Gutter Flashing. |
2 - Editing and rearrangement | 12.2 | 12.2 Purlin Creasing | Inserted photograph. |
4 - Clause Inserted | 17.1.2 | 17.1.1.2 Point Load Testing Standard | New Clause. |
4 - Clause Inserted | 17.3.2 | 17.1.3.2 Point Load Testing | New clause. |
1 - Minor Errata | 18.8 | 18.8 Sheet Metal Work For Roofing Contractors. | Clause revised for gender neutrality. No significant changes. |
4 - Clause Inserted | 19.13 2019 – December | Summary of Changes – December 2019 | |
0 - Clause Removed | 5.3.2.1 | Method 1: Gutter and Downpipe Capacity Determined by Graph | These methods have been replaced by online capacity calculating tools. |
0 - Clause Removed | 5.3.2.3 | Method 2: Gutter and Downpipe Capacity Determined by Calculations | These methods have been replaced by online capacity calculating tools. |
0 - Clause Removed | 5.3.3 | Roof Cladding Capacity | These methods have been replaced by online capacity calculating tools. |
0 - Clause Removed | 5.4 | Snow | Clause removed, Snow and hail are comprehensively discussed in Snow Loads. |
0 - Clause Removed | 5.4.1 | Hail | Clause removed. Leaf guards and maintenance are discussed under Gutter Maintenance. |
0 - Clause Removed | 5.5 | Gutters | The clause had been removed. Gutters are now discussed in more detail in a separate clause for each type, under the main clause Types of Gutter. |
0 - Clause Removed | 5.5.3 | Eaves Gutters | Clause deleted. Now discussed under External Gutters. |
0 - Clause Removed | 5.6.1 | Valley Catchment | This clause had been replaced with the newly developed online tool in Valley Capacity Calculations. |
0 - Clause Removed | 5.7 | Downpipes | Information previously contained in this clause is now discussed in Outlets and Downpipes. |
Out-of-band updates 16/12/2019 | |||
2 - Editing and rearrangement | 5.4.2A | 5.7.2 Capacity Table for Common Size Downpipes | Removed obsolete column for Roof Area Drained as the online calculator replaces this. |
2 - Editing and rearrangement | 5.7 | 5.4.7 Gutter Capacity Calculator | Added link to Common Sized Downpipes. |