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Metclad 850 Wall Cladding System

Metclad 850 External Wall Cladding system is comprised of a long run steel sheet with a trapezoidal profile, along with associated design and installation information.

Metalcraft fabricates the Metclad 850 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
  • Trapezoidal profile featuring clean lines 
  • Economical wide sheets
  • Suitable for horizontal or vertical wall cladding only
  • Metclad 850 sheets are available in Colorsteel® Endura®, Galvsteel®, Colorsteel® Maxx®, and Zincalume®
  • Metclad 850 sheets are available in the following sizes: 
    • Thicknesses: 0.4mm and 0.55mm
    • Width: Cover = 850mm, Sheet = 885mm
Scope of Use

Metalcraft Roofing supply the Metclad 850 system as a horizontal and vertical external wall cladding, 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 buildings up to 10m high
  • 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
  • On windows that comply with NZS4211:2008
  • Outbuildings or detached garages can be direct fixed as per E2/AS1
Limitations on Use


  • Metclad 850 may be used as a wall cladding system in exposure zones B & C. For use in 'Microclimatic considerations,' (as defined in Sec 4.2.4) refer to Metalcraft Roofing
  • Where Metclad 850 is to be used in exposure Zone D, then only Colorsteel® Endura® or Colorsteel® Maxx® may be used


  • Where Metclad 850 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 Metclad 850 design load span tables
  • Metclad 850 must be installed in conjunction with a drained cavity
NZS 3604 Corrosion Zone D suitable
Corrosion Exposure Zone D
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 Metclad 850 External Cladding system will comply with or contribute to compliance with the following provisions of the New Zealand 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.

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
Product Technical Statement


Loadspan Graph and Fixing Table
Fire Testing Document
Environmental Category Brochure
Metclad 850 Product Brochure
Colour Range
CAD/PDF Details
Commercial Vertical Cladding Details
Commercial Vertical Cladding Details DWG
Commercial Vertical Cladding Details DXF
Commercial Vertical Cladding Details RVT

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.

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