Description

1. The Nu-Wall Aluminium Cladding System - Horizontal on Cavity is a cavity-based, inter-locking powder-coated aluminium weatherboard system. It is designed to be used as an external wall cladding system for residential and light commercial type buildings where domestic construction techniques are used.

2. The system includes horizontally fixed Nu-Wall weatherboards, cavity battens, internal and external corner mouldings, starter strip, board jointers, board locators, soffit caps, joinery flashings and accessories.

3. The system incorporates a primary and secondary means of weather resistance (first and second line of defence) against water penetration by separating the cladding from the external wall framing with a nominal 20 mm cavity.

Scope

1. The Nu-Wall Aluminium Cladding System - Horizontal on Cavity 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.

2. The Nu-Wall Aluminium Cladding System - Horizontal on Cavity 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.

3. The Nu-Wall Aluminium Cladding System - Horizontal on Cavity 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.

4. The Nu-Wall Aluminium Cladding System - Horizontal on Cavity is appraised for use with aluminium window and door joinery that is installed with vertical jambs and horizontal heads and sills. (Note: The Appraisal of the Nu-Wall Aluminium Cladding System - Horizontal on Cavity relies on the joinery meeting the requirements of NZS 4211 for the relevant Wind Zone, or wind pressure.)