Technical Statement
Product Description
Hermpac Rusticated, Splaycut & Multi-Splay weatherboards are a popular design solution due to their versatility and ability to showcase the natural beauty of timber.
Once the mainstay in historical buildings, variations to the rusticated theme continue to evolve.
Various innovative profiles have been developed, with with differing negative detailing, and all looking perfectly matched for their required surrounds, be they modern, traditional, urban or rural. Some rusticated profiles can also be oriented to a vertical application, creating something a little different.
Unlike Bevelback, Splaycut profiles fit snug and firm against a wall frame offering a lighter shadow line and projection from the plane. Splaycut cladding can be an affordable yet highly versatile solution.
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.
For weathertightness and structural wind loading 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 complying with the NZBC; and,
- situated in specific design wind pressures up to a maximum design differential ultimate limit state (ULS) of 2.5 kPa.
Refer BRANZ Appraisal 658 (2020), and Codemark Certificate GM-CM30037 for full details.
Or refer Hermpac website for direct fix option (risk score 0-6).
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
Hermpac Rusticated, Splaycut & Multi-Splay Weatherboard cavity system meets Clause B1 Structure: B1.3.1, B1.3.2, B1.3.4 and B1.3.3. (a), (h), (j), and (q).
- Clause B2 Durability: Performance B2.3.1(b), B2.3.2
Hermpac Rusticated, Splaycut & Multi-Splay Weatherboard cavity system meets Clause B2 Durability: B2.3.1 (b) 15 years and B2.3.2.
- Clause E2 External moisture: Performance E2.3.2
Hermpac Rusticated, Splaycut & Multi-Splay Weatherboard cavity system meets Clause E2 External Moisture: E2.3.2.
- Clause F2 Hazardous building materials: Performance F2.3.1
Hermpac Rusticated, Splaycut & Multi-Splay Weatherboard cavity system meets Clause F2 Hazardous Building Materials: F2.3.1.
Notes
Refer Product Technical Statement for full details.
Evidence
The product meets the requirements set out in the following documents, or relevant parts of cited standards within the documents:
The Hermpac Rusticated, Splaycut & Multi-Splay Weatherboard Cavity System was tested in accordance with, and meets the requirements of E2/VM1.
It can be direct fixed for buildings with risk score of 0-6 or over cavity (18/20mm and 40/45mm) with risk score of 0-20.
Refer Hermpac literature for full Scope of Use.
Supporting evidence
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.
Product Criteria
Design requirements
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 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.
Installation requirements
The system must be installed in accordance with the Hermpac Rusticated, Splaycut & Multi-Splay Weatherboard Cavity System Installation Specification, BRANZ Appraisal 658 (2020), Codemark Certificate GM-CM30037, and the Hermpac Rusticated and Splaycut construction drawing details (ref: HC-RUST/HC-SPLAY).
For direct fix refer Hermpac Rusticated, Splaycut & Multi-Splay Installation Specification and Construction Drawings for Direct Fix installation.
Please refer to www.hermpac.co.nz for this technical information or email technical@hermpac.co.nz
Maintenance requirements
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.
Warrantees
Project/site warranty documentation provided on request.
Environmental
Hermpac timbers are available via a number of independent third party sustainability certification schemes including FSC, PEFC, SDI, and CSA.
Hermpac timbers meet the requirements for clause F2 Hazardous building materials F2.3.1 and does not present a health hazard to people.
Hermpac holds Declare label for Western Red Cedar, Yellow Cedar and Kanda.
Relationships
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New Zealand Made |
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FSC
SGS-COC-008082 |
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PEFC
SGS-PEFC/COC-1212 |
Building Product Information Requirements
Manufacturer
Legal Trading Name:
Hermpac
Business Email:
technical@hermpac.co.nz
Contact Number/s:
09 4219840
Product Identifier
CLASS 2
Warnings
This product has no warnings associated with it.
