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Appraisal number: 487 (2019)

Date issued: 15 Oct 2019

Ulltraclad® Cavity System

Description

The Ulltraclad® Cavity System is a cavity-based, interlocking 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.

The system includes horizontally fixed Ulltraclad® weatherboards , timber battens, internal and external corner mouldings, starter strips, board jointers, board locators, joinery flashings and accessories.

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

The Ulltraclad® 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.
  • Constructed with timber framing complying with the NZBC.
  • With a risk score of 0-20 calculated in accordance with NZBC Acceptable Solution E2/AS1 Table 2.
  • Situated in NZS 3604 wind zones up to and including extra high.

The Ulltraclad® Cavity System has also been 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 with regards to building height and floor plan area.
  • Constructed with timber framing complying with the NZBC.
  • Situated in specific design wind pressures up to a maximum design differential ultimate limit state (ULS) of 2.5 kPa.

The Ulltraclad® Cavity System must only be installed horizontally on vertical, flat surfaces.

The Ulltraclad® Cavity System is appraised for use with aluminium window and door joinery that is installed with vertical jambs and horizontal heads and sills. (The Appraisal of the Ulltraclad© Cavity System relies on the joinery meeting the requirements of NZS 4211 for the relevant wind zone or design wind pressure.)

Technical literature

Horizontal Cavity System Details H00 - H25 Rev 10, 2019 for the following profiles:

  • UA 4528 Standard Board
  • UA 4917 Tee Board
  • UA 5059 Traditional Board
  • UA 6975 Shadoline Board
  • UA 7401 Infinity Board
  • UA 7726 Shado 100 Board
  • UA 7868 Shado 140 Board
  • UA 7922 Shiplap Board
  • UA 7923 Ulltraline Board

Note: UA 5104 Full Corrugate profile is not included in this Appraisal.

Consenting instructions

Always refer to the Appraisal in full and the technical literature.

Appraisal holder

Ullrich Aluminium Co Ltd
Address:
Phone: 0800 500 338
Email:

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