Appraisal number: 828 (2020)
Date issued: 27 May 2020
Hermpac Board and Batten Cavity System
Description
The Hermpac Board and Batten Cavity System is a cavity-based vertical 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 weatherboards and battens, ventilated cavity battens, flashings and accessories and is finished with an exterior grade premium penetrating oil, stain or an exterior grade 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 an 18 mm minimum drained cavity.
Technical literature
This Appraisal must be read in conjunction with:
- Board & Batten Weatherboard Cavity System Installation Specification, May 2022V2
- all drawings referenced in HC-BBAT-000 and HC BBAT-001, dated 01/11/2021.
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.