Technical Statement
Product Description
Scope of use
Corrugate is a roof and wall cladding for non-specifically designed timber framed buildings designed and constructed in accordance with B1/AS1, NZS 3604 and E2/AS1, non-specifically designed steel framed buildings to NASH 3405, and specifically designed buildings in accordance with B1/VM1 and AS/NZS 1170.
When used as a roof cladding:
- Corrugate may be used with a minimum roof gradient of 8 degrees
When used as a wall cladding:
- Corrugate may be fixed vertically directly to wall framing where the Risk Score is 0-20
- When fixed
horizontally, Corrugate must be fixed over a nominal 20mm drained cavity where
the Risk Score is 0-20.
·
- Specific design is
required where the Risk Score is greater than 20,
New Zealand Building Code (NZBC)
The product will, if employed in accordance with the supplier's installation and maintenance requirements, assist with meeting the following provisions of the building code:
- Clause B1 Structure: Performance B1.3.1, B1.3.2, B1.3.3, B1.3.3(a)
- Clause B2 Durability: Performance B2.3.1(b)
- Clause C3 Fire affecting areas beyond the fire source: Performance C3.7, C3.7(a)
- Clause E2 External moisture: Performance E2.3.1, E2.3.2
- Clause F2 Hazardous building materials: Performance F2.3.1
Notes
The
product will, when installed using the details in the Corrugate Profile
Technical Summary, meet the following provisions of the building code:
·
- Clause
B1 Structure: Performance B1.3.1; B1.3.2; B1.3.3 for the relevant physical
conditions of a) self-weight, b) imposed gravity loads arising from use, (c) temperature,
(f) earthquake, g (snow) and h) wind; B1.3.4
·
- Clause
B2 Durability: Performance B2.3.1(b); B2.3.2
·
- Clause
C3 Fire Affecting Areas Beyond the Fire Source: Performance C3.7 Corrugate is non-combustible and
contributes to C3.7a)
·
- Clause
E2 External moisture: Performance
E2.3.1, E2.3.2 Corrugate complies with E2/AS1
·
- F2
Hazardous Building Material: Performance F2.3.1
Evidence
The product meets the requirements set out in the following documents, or relevant parts of cited standards within the documents:
The
product meets the requirements set out in the following documents, or relevant
parts of cited standards within the documents:
·
- Acceptable
Solution for External Moisture E2/AS1
·
- Verification
Method for Structure B1/VM1
·
- Acceptable
Solution B1/AS1
·
- Verification
Method C/VM2
·
- AS/NZS
2728: 2013
·
NZ
Metal Roof and Wall Cladding Code of Practice
- Version 2.2/2012 MRM Code of Practice ·
- Tested for wind
loads to AS4040.3: 1992 Methods of testing sheet roof and wall cladding
Resistance to wind pressures for cyclone regions AS4040.2: 1992 Methods of testing sheet roof and wall cladding
Resistance to wind pressures for non-cyclone regions.
Supporting evidence
The product has and can make available the following additional evidence to support the above statements:
Product Criteria
Design requirements
Refer to Roofing
Industries Corrugate Profile Technical Summary for tables of maximum spans
(intermediate and end) for each wind zone.
Selection of the
correct grade of material and appropriate surface coating is imperative to
ensure that Corrugate performs satisfactorily in the environment it is to be
installed in and to meet the requirements of the NZBC.
Corrugate is
manufactured from Zincalume, aluminium-zinc-magnesium and galvanised steel with
Colorcote or Colorsteel pre-painted finishes using all the latest coating
technology to AS/NZS 2728.
Contact
Roofing Industries for environmental categories and surface coating literature
for selection of material and surface coating suitable for the environment where
the roof or wall cladding is to be located.
Installation requirements
Materials in
contact with Corrugate must be compatible as specified in E2/AS1 Table 21.
Maintenance requirements
Regular
maintenance will extend the life of Corrugate and associated accessories.
Maintenance guides are available from Roofing
Industries or can be downloaded from either NZ Steel or Pacific Coilcoaters
website.
Guide to regular maintenance:
- Inspect the roof,
including fasteners, and repair any damage every 6 months.Wash areas not
receiving regular rain washing with fresh water at least every 3 – 6 months.
- Remove debris from
gutters every 3 - 6 months.
- Remove any
noticeable buildup of salt deposits and/or other contaminants when identified.
- Please consult with
your local distributor when considering over painting to ensure correct
procedures are undertaken.
Environmental
Colorsteel and
Colorcote pre-painted steel has been extensively tested and proven in some of
New Zealand's most extreme UV, wind, rain, snow and ice environments.
All Colorsteel and
Colorcote is factory painted at either NZ Steel, Glenbrook or Pacific Coilcoaters,
Penrose. Both plants operate within strict environmental controls.
Environmental category literature available by
request or the roof.co.nz website, or by
contacting Roofing Industries, technical helpline 0800 844 822
Relationships
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New Zealand Made |
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Date last validated:
07 April 2017 |
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Date last updated:
07 April 2017 |