You are using an outdated browser version not supported by this website.
Click here to upgrade your browser

Corrugate Roofing and Wall Cladding System

Corrugate is a Roofing and External Wall Cladding system comprised of a long run steel sheet with a corrugated profile, along with associated design and installation information.

Metalcraft fabricates the Corrugate sheets from steel manufactured by New Zealand Steel. This steel is supplied with different protective coatings which are designed to withstand conditions in specific New Zealand Corrosion Zones. 

Key Features
  • Cost effective, classic Kiwi corrugate profile
  • Suitable for roofing, and horizontal or vertical cladding
  • Minimum pitch 8°
  • Bullnose, Drape and Spring Curving options available
  • Corrugate sheets are available in Colorsteel® Endura®, Galvsteel®, Colorsteel® Maxx®, and Zincalume®
  • Corrugate sheets are available in the following sizes: 
    • Thicknesses: 0.4mm and 0.55mm
    • Width: Cover = 760mm Sheet = 851mm
Scope of Use

Metalcraft Roofing supply the Corrugate system as a horizontal and vertical external wall cladding, and for roofs with a defined minimum pitch of 8 degrees for use on commercial and residential buildings within the following scope:


  • In wind zones:
    • Up to and including Extra High as defined by NZS-3604:2011
    • Subject to specific engineering, if the engineer has satisfied themselves that the product, pitch and fixings will meet the conditions
  • In all climate zones as defined by NZS-3604:2011, subject to the limitations set out below
  • On buildings located within 1m of the relevant boundary, in respect of fire spread only


  • On new buildings that have been designed and constructed to comply with the NZ Building Code (NZBC) using timber or steel framing
  • On existing buildings using timber and steel framing where the designer and installer have satisfied themselves that the building is suitable for the intended building work
  • In conjunction with a vapour permeable building wrap that has a permeability of 36g/m2/day of a vapour resistance of no more than 500MNs/g
  • Can be used in conjunction with a potable water collection system
Limitations on Use


  • Corrugate may be used as a roof cladding system in exposure zones B, C & D as defined in Sec 4, NZS3604:2011. For use in 'Microclimatic considerations,' (as defined in Sec 4.2.4) refer to Metalcraft Roofing
  • Corrugate may be used as a wall cladding system in exposure zones B & C
  • Where Corrugate is to be used in exposure Zone D, then only Colorsteel Endura or Colorsteel Maxx may be used


  • Where Corrugate is used in an insulated building in conjunction with steel framing, a thermal break is required
  • Contact with other materials must be in accordance with Table 21 (E2/AS1), or compatible with the The New Zealand Metal Roofing Manufacturers Association Inc (NZMRM) Code Of Practice
  • Building height and design wind speed is limited by the Corrugate design load span tables
  • Where it is used as a roof cladding system, Corrugate sheet lengths of ≤40m must be installed on a roof with a minimum pitch of 8°. Corrugate sheet lengths of >40m but less than <60m must be installed on a roof with a minimum pitch of 9°
  • Outbuildings or detached garages can be direct fixed as per E2/AS1
  • When installed vertically as a wall cladding, Corrugate may be direct-fixed up to a risk score of 20, when the risk calculation relies on the E2/AS1 risk matrix methodology
  • When installed horizontally or vertically as a wall cladding, Corrugate must always be installed in conjunction with a drained cavity
NZS 3604 Wind Zone Extra High suitable
Extra High Wind Zone
NZS 3604 Wind Zone Specific Design suitable
Specific Design Wind Zone
Statement of Building Code Compliance

If designed, installed and maintained in accordance with all Metalcraft Roofing requirements, the Corrugate Roofing and External Cladding system will comply with or contribute to compliance with the following provisions of the NZ Building Code:

  • B1 Structure: B1.3.1, B1.3.2, B1.3.3 (a, b, c, d, g, i)
  • B2 Durability: B2.3.1 (b)
  • C3 Fire Affecting Areas Beyond the Fire Source: C3.4(a), C3.5, C3.7 (a)
  • E2 External Moisture: E2.3.1, E2.3.2, E2.3.7 (a-c)
  • F2 Hazardous Building Materials: F2.3.1

See product technical statement for full information.

Other Performance Attributes
  • Corrugate Roofing will not contaminate potable water — AS/NZS 4020:2005
B1 Structure compliant
B2 Durability compliant
C Protection from Fire compliant
Protection from Fire
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
Loadspan Graph and Fixing Table
Product Technical Statement
Fire Testing Document
Environmental Category Brochure
Colour Range
Additional Information
CAD/PDF Details
Commercial Horizontal Cladding Details
Commercial Roof Details
Commercial Vertical Cladding Details
Residential Horizontal Cladding Details
Residential Roof Details
Residential Vertical Cladding

Metalcraft Roofing are a privately owned building product rollformer and installer with an extensive range of longrun roofing profiles, lightweight metal tiles and rainwater system solutions.

Product Enquiries

News from Metalcraft Roofing

Modern, Innovative Learning at Lemonwood Grove School
Metalcraft Solar: Fully Integrated Solar Systems
Cedar and Deep Trough Combo Provides Eye-Catching Facade
Get a free weekly digest of essential news

New and updated architectural products, design solutions, inspiration, technical advice and more when you sign up for EBOSS.