Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System

Abbreviation
Appraisal number 658 (2020)
Amendment
18/07/2022
Valid from
27/05/2020

Information provider
BRANZ Limited,
Information type
BRANZ Appraisal,
Format
PDF,

Description

1. The Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System is a cavity-based timber weatherboard external wall cladding system for residential and light commercial type buildings where domestic construction techniques are used.

2. The system consists of horizontally fixed Hermpac Rusticated, Splaycut and Multi-Splay timber weatherboards, cavity battens, flashings and accessories and is finished with a premium penetrating oil, stain or an exterior paint system to Hermpac specifications.

3. 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

1. The Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System incorporating stain finished weatherboards and paint finished DuraLarch and AshinDura weatherboard 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; 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.

2. The Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System incorporating 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; and,
  • constructed with timber framing subject to specific engineering design; and,
  • situated in specific design wind pressures up to a maximum design differential ultimate limit state (ULS) of 2.5 kPa.

3. The Hermpac Rusticated, Splaycut and Multi-Splay 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; 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 Medium when studs are at maximum 600 mm centres, and NZS 3604 Wind Zones up to, and including Very High when studs are at maximum 400 mm centres.

4. The Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System must be installed horizontally on vertical, flat surfaces.

5. The Hermpac Rusticated, Splaycut and Multi-Splay 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 Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System relies on the joinery meeting the requirements of NZS 4211 for the relevant Wind Zone or wind pressure.)

For assistance with locating previous versions, please contact the information provider.
Notes/comments

This Appraisal replaces BRANZ Appraisal No. 658 (2014).

This Appraisal was amended to remove reference to Cavibat cavity battens, to add Yellow Cedar back in to the Appraisal and reduce weatherboard thickness to 18 mm.

View on Information Provider website Download this resource (PDF, 421KB)
For assistance with locating previous versions, please contact the information provider.

This Appraisal replaces BRANZ Appraisal No. 658 (2014).

This Appraisal was amended to remove reference to Cavibat cavity battens, to add Yellow Cedar back in to the Appraisal and reduce weatherboard thickness to 18 mm.

This resource is not cited by any other resources.

Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System

This document is not CITED BY any other resources:

Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System

Description

1. The Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System is a cavity-based timber weatherboard external wall cladding system for residential and light commercial type buildings where domestic construction techniques are used.

2. The system consists of horizontally fixed Hermpac Rusticated, Splaycut and Multi-Splay timber weatherboards, cavity battens, flashings and accessories and is finished with a premium penetrating oil, stain or an exterior paint system to Hermpac specifications.

3. 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.

View on Information Provider website Download this resource (PDF, 421KB)
Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System
Description

1. The Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System is a cavity-based timber weatherboard external wall cladding system for residential and light commercial type buildings where domestic construction techniques are used.

2. The system consists of horizontally fixed Hermpac Rusticated, Splaycut and Multi-Splay timber weatherboards, cavity battens, flashings and accessories and is finished with a premium penetrating oil, stain or an exterior paint system to Hermpac specifications.

3. 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.

View on Information Provider website Download this resource (PDF, 421KB)
This resource does not cite any other resources.

Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System

This resource does not CITE any other resources.
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