See BRANZ Appraisal for full information:

The Nu-Wall Aluminium Cladding Cavity System has been appraised as an external wall cladding for buildings within the following scope:

• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1; and,
• constructed with timber framing complying with the NZBC; and,
• with a risk score of 0-20, calculated in accordance with NZBC Acceptable Solution E2/AS1, Table 2; and,
• situated in NZS 3604 Wind Zones up to, and including ‘Extra High’.

The Nu-Wall Aluminium Weatherboard Cladding Cavity System has also been appraised for weathertightness and structural wind loading when used as an external horizontally fixed wall cladding system for buildings within the following scope:

• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1; and,
• constructed with timber and steel framing complying with the NZBC; and,
• situated in specific design wind pressures up to a maximum design differential ultimate limit state (ULS) of 2.5 kPa.
  
  

• The Nu-Wall Aluminium Cladding Cavity System must only be installed horizontally on vertical, flat surfaces.
• The tops of parapets and balustrades must have a minimum 5º slope and be waterproofed with metal cap flashings in accordance with the Technical Literature.
• The Nu-Wall Aluminium Cladding Cavity System is appraised for use with aluminium window and door joinery that is installed with vertical jambs and horizontal heads and sills.