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Appraisal number: 650 (2020)

Date issued: 27 May 2020

Hermpac VertiLine Vertical Shiplap Weatherboard Cavity System


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.

Technical literature

This Appraisal must be read in conjunction with:

  • VertiLine Vertical Shiplap Weatherboard Cavity System Installation Specifications, May 2022V2
  • all drawings referenced in HC-SHIP-000 and HC-SHIP-001, both issued 2022
  • all drawings referenced in HC-SHIP40-000 and HC-SHIP40-001, both dated 18/10/2017
  • all drawings referenced in VC-RWD-000 and VC-RWD-001, both dated 15/4/2020.

All aspects of design, use, installation and maintenance contained in the technical literature and within the scope of this Appraisal must be followed.

Consenting instructions

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

Appraisal holder

Herman Pacific Ltd
Phone: 09 421 9840

Manufacturer details