The Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System is a cavity-based external wall cladding system for residential and light commercial type buildings where domestic construction techniques are used.
Manufactured in New Zealand from Canadian Coastal Western Red Cedar (Thuja plicata) and available in various widths and thicknesses incorporating the standard 27mm rebate and 25mm lap detail. Selected profiles available in "DuraLarch™" Siberian Larch (Larix sibirica) and Ashin-Dura™ (paint finish).
Hermpac rusticated, splaycut and multi-splay weatherboards are available in both standard and custom profiles, of various widths and thicknesses. These profiles can be supplied with either a bandsawn face (BSF) or dressed face (DF).
There is a range of corner mouldings, "smart corners", fascia, flashings, and fixings that accompany the Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System.
Scope of use
The Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System has been appraised as an external horizontally fixed wall cladding system 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.
Refer BRANZ Appraisal 658 (2014) and Codemark Certificate GM-CM30037.
New Zealand Building Code (NZBC)
The product will, if employed in accordance with the supplier's installation and maintenance requirements, assist with meeting the following provisions of the building code:
- Clause B1 Structure: Performance B1.3.1, B1.3.2, B1.3.3(a), B1.3.3(h), B1.3.3(j), B1.3.3(q), B1.3.4
- Clause B2 Durability: Performance B2.3.1(b), B2.3.2
- Clause E2 External moisture: Performance E2.3.2
- Clause F2 Hazardous building materials: Performance F2.3.1
The product meets the requirements set out in the following documents, or relevant parts of cited standards within the documents:
The Hermpac Rusticated and Splaycut Weatherboard Cavity System was tested in accordance with, and meets the requirements of E2/VM1.
The product has and can make available the following additional evidence to support the above statements:
Use in Service History
Rusticated and splaycut weatherboards have been used as a cladding in New Zealand for over a century.
The Hermpac Rusticated and Splaycut Weatherboard Cavity System is designed to be used as an external cladding, fixed horizontally on flat surfaces.
The profiles are manufactured in accordance with NZ3617 (1979) and BRANZ Bulletin 411.
There is an extensive range of standard and custom profile designs with a focus on innovation and product development. Refer to www.hermpac.co.nz for latest profiles.
The system must be installed in accordance with the Hermpac Rusticated and Splaycut Weatherboard Cavity System Installation Specification, BRANZ Appraisal 658 (2014), Codemark Certificate GM-CM30037, and the Hermpac Rusticated and Splaycut construction drawing details (ref: HC-RUST).
Please refer to www.hermpac.co.nz for this technical information or email email@example.com
Maintenance of the Hermpac Rusticated and Splaycut Weatherboard Cavity System is the building owner's responsibility.
Annual inspections must be made to ensure that all aspects of the cladding system, including flashings, remain in a weatherproof condition. Any damaged areas or areas showing signs of deterioration which would allow water ingress, must be repaired immediately. Sealant, coatings, flashings or the weatherboards must be repaired in accordance with the relevant manufacturer's instructions.
Maintenance requirements will depend on the coating type that is applied. Please refer to the coating manufacturer's specification. Specific maintenance schedules for re-coating oil stains are issued on a project specific basis.
Regular cleaning (at least annually) of the surface finish with water and a mild detergent is recommended to remove grime, dirt and organic growth, to maximise the life and appearance of the cladding.
Herman Pacific Canadian Coastal Western Red Cedar is available via a number of independent third party sustainability certification schemes including FSC, PEFC, SDI, and CSA. Herman Pacific can offer full chain of custody certification for FSC certified cedar.
Canadian Coastal Western Red Cedar is sourced primarily from managed forests in British Columbia, Canada. Herman Pacific Western Red Cedar meets the requirements for clause F2 Hazardous building materials F2.3.1 and does not present a health hazard to people.
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