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Appraisal number: 650 (2020)

Date issued: 27 May 2020

Hermpac VertiLine Vertical Shiplap Weatherboard Cavity System

Description

The Hermpac VertiLine Vertical Shiplap Weatherboard Cavity System is a cavity-based shiplap timber weatherboard external wall cladding system for residential and light commercial type buildings where domestic construction techniques are used.

The system consists of vertically fixed Hermpac shiplap weatherboards, ventilated cavity battens, flashings and accessories and is finished with a premium penetrating oil, stain or an exterior paint system to Hermpac specifications.

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 frame with a minimum 18 mm drained cavity.

Scope

The Hermpac VertiLine Vertical Shiplap Weatherboard Cavity System incorporating oil or stain-finished cedar and DuraLarch weatherboards and paint-finished DuraLarch and AshinDura weatherboards has been appraised as an external wall cladding system 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 scope limitations of NZBC Acceptable SE2/AS1 paragraph 1.1.porating oil or stain-finished weatherboards 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 subject to specific engineering design.
  • Situated in specific design wind pressures up to a maximum design differential ultimate limit state (ULS) of 2.5 kPa.

The Hermpac VertiLine Vertical Shiplap Weatherboard Cavity System incorporating paint-finished cedar weatherboards has been appraised as an external wall cladding system for buildings within the following scope:

  • The scope limitations of NZBC Acceptable System 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 medium when dwangs or structural Vertibat cavity battens are at maximum 480 mm centres and NZS 3604 wind zones up to and including very high when dwangs or structural Vertibat cavity battens are at maximum 400 mm centres.

The Hermpac VertiLine Vertical Shiplap Weatherboard Cavity System must only be installed vertically on vertical, flat surfaces.

The Hermpac VertiLine Vertical Shiplap Weatherboard 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 Hermpac VertiLine Vertical Shiplap Weatherboard Cavity System relies on the joinery meeting the requirements of NZS 4211 for the relevant wind zone or wind pressure.)

Technical literature

  • VertiLine Vertical Shiplap Weatherboards Cavity System Installation Specifications, June 2017
  • Architectural Details HCSHIP001- HCSHIP802, 16/10/2017

The following weatherboard profiles are covered by the scope of the Appraisal:

  • Hermpac Standard Profile HP50 - HP60.
  • Hermpac Custom Profiles profiled in accordance with NZS 3617 and BRANZ Bulletin 411.

Consenting instructions

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

Appraisal holder

Herman Pacific Ltd
Address:
Phone: 09 421 9840

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