Description

1. The Nu-Wall 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.

Scope

Timber Framing

1. The Nu-Wall Cladding System - Horizontal on Cavity has been appraised as an external wall cladding for timber-framed buildings within the following scope:

• the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 for timber-framed buildings; 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.

Specific Design

2. The Nu-Wall Cladding System - Horizontal on Cavity is also appraised for weathertightness and structural wind loading when used as an external wall cladding system for buildings within the following scope:

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

General

3. The Nu-Wall 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 Cladding System - Horizontal on Cavity has been 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 Cladding System - Horizontal on Cavity relies on the joinery meeting the requirements of NZS 4211 for the relevant Wind Zone and wind pressure).

5. The system may also be used with uPVC window and door joinery systems that hold a current BRANZ Appraisal for use with residential-type construction.