Refer to painting sections for finishes to weatherboard cladding.

Refer to the general section 1232 INTERPRETATION & DEFINITIONS for abbreviations and definitions used throughout the specification.

The following abbreviations apply specifically to this section:

Refer to the general section 1233 REFERENCED DOCUMENTS.  The following documents are specifically referred to in this section:

JAS-ANZ CodeMark Certification CMNZ30037 - Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System

JAS-ANZ CodeMark Certification CMNZ30038 - Hermpac Bevelback and Rebated Bevelback Weatherboard Cavity System

Hermpac Construction Drawings

Hermpac Bevelback & Rebated Bevelback Weatherboard Cavity System Installation Specifications

Hermpac Bevelback & Rebated Bevelback Weatherboard Direct Fix System Installation Specifications

Hermpac Product Installation Checklist – Bevelback and Rebated Bevelback Weatherboard Cavity System (Aug 2023 V2)

Hermpac Rusticated, Splaycut & Multi-Splay Weatherboard Cavity System Installation Specifications

Hermpac Rusticated, Splaycut & Multi-Splay Weatherboard Direct Fix System Installation Specifications

Hermpac Product Installation Checklist – Rusticated, Splaycut & Multi-Splay Weatherboard Cavity System (Aug 2023 V2)

Hermpac Standard and Custom Profiles

Hermpac Profile Portfolio

Hermpac Grade descriptions

Hermpac Nail/Screw fixings

Hermpac Legal and / or Sustainable Certification

Hermpac Product Technical Statement (PTS) – Bevelback & Rebated Bevelback (July 23)

Hermpac Product Technical Statement (PTS) – Rusticated, Splaycut and Multi-Splay (July 23)

Machinecoat - Flood Coat Inundation versus Spray Application

Maintenance of selected Wood Oil / Oil Based Stain finishes

Hermpac WRC Information Sheet – cuts and characteristics

Hermpac WR & Yellow Cedar cuts and characteristics

Declare label HMP-0003 - Western Red Cedar

Declare label HMP-0006 - Yellow Cedar

Declare label HMP-0005 - Kanda

BRANZ Appraisal 658 - Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System

BRANZ Appraisal 663 - Hermpac Bevelback and Rebated Bevelback Weatherboard Cavity System

Herman Pacific Limited - FSC Licence No FSC-C102539, Certificate Code SGS-COC-008082, expires 30 Nov 2024

Herman Pacific Limited - PEFC Forestry Sustainable Certificate Code SGS-PEFC/CoC NZ10/1212, expires 23 Nov 2026

Manufacturer/supplier contact details

Provide an installer/applicator warranty:

• Provide this warranty on the installer/applicator standard form (if not available then use the standard form in the general section 1237WA WARRANTY AGREEMENT).
• Commence the warranty from the date of practical completion of the contract works.

Refer to the general section 1237 WARRANTIES for additional requirements.

Abbreviations and definitions:

FSC 100%

• FSC-certified material originating in FSC-certified forests or plantations that has not been mixed with material from another category throughout the supply chain.FSC 100% products can be used in FSC Mix product group.

FSC Mix % or FSC Mix Credit

• A mixture of the following - FSC 100%, FSC recycled timber, FSC Controlled Wood - and supplied with a percentage claim or Credit claim.

FSC Controlled Wood

• Forest of origin risk-assessed against FSC Controlled Wood standards and deemed low risk of being:illegally logged, violating traditional/civil/conservation rights, change of use or GM planting.All non-FSC certified timber plantations in NZ have been assessed and deemed low risk by FSC.

FSC Forest Management (FM) Certification

• A forest management unit independently FSC inspected and certified that it complies with the internationally-agreed FSC Principles.

FSC Chain of Custody (COC) Certification

• COC certification applies to those who process, transform or trade forest products, providing a guarantee about the production and source of FSC-certified products and tracking the production and distribution of the products.

Organisation website details:

Forest Stewardship Council website:- https://nz.fsc.org/en-nz

Herman Pacific Limited - FSC COC Code: SGS-COC-008082 Expires 30 Nov 2024

Herman Pacific Limited: - FSC Licence Code: FSC-C102539 Expires 30 Nov 2024

PEFC (Programme for the Endorsement of Forest Certification) is a global alliance of national forest certification systems, which endorses national forest certification systems developed through multi-stakeholder processes that are tailored to local conditions.

PEFC Chain of Custody certification tracks forest based products from sustainable sources to the final product.  Each step of the supply chain is closely monitored through independent auditing ensuring that unsustainable sources are excluded.

Organisation website details:

Programme for the Endorsement of Forest Certification website: www.pefc.org

Herman Pacific Limited - PEFC Certificate Code SGS-PEFC/COC-1212, expires 23 Nov 2021.

Hermpac horizontal weatherboard cladding systems meet the requirements of the NZBC when used within the Conditions and Limitations of their Certificates.

Provide the following compliance documentation: -

• Installer / applicator warranty
• Producer Statement - Construction from the applicator / installer
• Other information required by the BCA in the Building Consent Approval documents.

Design and use the fixings appropriate for the wind zone (R) and topographical classification (T) of this site and building height; as required by NZS 3604.

Accept responsibility for the weather-tight performance of the completed cladding system, including all penetrations. To NZBC B2/AS1 Durability and NZBC E2/AS1 External moisture.

Hermpac Canadian Coastal Western Red Cedar (Thuja plicata) harvested from the sustainable managed forests of British Columbia, Canada.  Hermpac Western Red Cedar is supplied from forest sources, certified legal and sustainable under one or more independent third party verified certification systems (PEFC, CSA, SFI or FSC).  Hermpac holds a Declare label for Western Red Cedar - HMP-0003.

Hermpac Canadian Yellow Cedar (Chamaecyparis nootkatensis) harvested from the sustainable managed forests of British Columbian coast, through to Alaska.  Hermpac Yellow Cedar is supplied from forest sources, certified legal and sustainable under one or more independent third party verified certification systems (PEFC, CSA, SFI or FSC).  Hermpac holds a Declare label for Yellow Cedar - HMP-0006.

Hermpac DuraLarch™ (Larix Sibirica) harvested from the sustainable managed forests of Northern Europe.  Hermpac DuraLarch™ is supplied from forest sources, certified legal and sustainable under one or more independent third party verified certification systems (FSC).

Hermpac Single Species AshinDura™ is harvested from the sustainable managed forests of British Columbia, Canada.  Hermpac AshinDura™ is supplied with Quarter Sawn grain orientation, from forest sources certified legal and sustainable under one or more independent third party verified certification systems (PEFC, CSA, SFI or FSC).  AshinDura™ is specific to Hermpac.

Hermpac Kanda (Beilschemiedia ssp) harvested from sustainably managed forests of Central Africa, certified legal and sustainable under FSC independent third party verified certification system.  Hermpac holds a Declare label for Kanda - HMP-0005.

Weatherboards to Hermpac profiles, Lap and Rebate details to BRANZ BU 411 and general design to the NZS 3617, species and grading to NZS 3602, table 2, reference 2A.1, Requirements for wood-based building components to achieve a 15-year durability performance.  Weatherboards in lengths relative to profile selection and application, with all unsound and open split knots excluded by cross cut removal prior to fixing into position.

Acceptable Solution is limited to the following types of weatherboards and their derivatives:

• Horizontal Standard Bevel Back and Hermpac Custom Profiles
• Horizontal Standard Rebated Bevel Back and Hermpac Custom Profiles
• Horizontal Standard Rusticated and Hermpac Custom Profiles
• Horizontal Standard Splaycut, Multi-Splay and Hermpac Custom Profiles

A selection of the above profiles are also available in Western Red Cedar and Yellow Cedar finger-joint (CedarOne Evolve and CedarLine Evolve).  CedarOne Evolve is quarter-sawn cut Cedar.  CedarLine Evolve is primarily flat-sawn cut Cedar.  Evolve profiles are available across most standard and custom profiles.  The timber is machined with a “combed” finish to the front face and the boards are finished with an oil or stain as per Hermpac Iiterature.

Regular paint finish finger-joint (CedarOne Mantle and CedarLine Mantle) is also available in Western Red Cedar and Yellow Cedar.  Profiles are machined with a “dressed” finish to the front face and the exposed corners are machined to paint quality - PQ (ie. rounded edges for paint adherence).  Boards are supplied pre-primed and undercoated, sanded and/or de-nibbed/buffed between coats.

A selection of the above profiles are also available in AshinDura™.  Profiles are machined with a “dressed” finish to the front face and the exposed corners are machined to paint quality – PQ (ie. rounded edges for paint adherence).  Boards are supplied pre-primed and undercoated, sanded and/or de-nibbed/buffed between coats.

To Hermpac profiles as detailed, with species and grading to NZS 3602, but with all unsound and open split knots excluded by cross cut removal prior to fixing into position.  To NZS 3602, table 2, reference 2A.3, Requirements for wood-based building components to achieve a 15-year durability performance.

To Hermpac profiles, with species and grading to NZS 3602, but with all unsound and open split knots excluded by cross cut removal prior to fixing into position.  To NZS 3602, table 2, reference 2A.3, Requirements for wood-based building components to achieve a 15-year durability performance.

For flexible wall underlays, rigid wall underlays and rigid air barriers, refer to the appropriate separate section(s).

Radiata Pine H3.1 minimum, merchant grade battens, 20mm x 45mm, 40mm x 45mm and 45mm x 40mm, height to match timber framing studs.  To NZS 3602, table 1, reference 1D.10, Requirements for wood-based building components to achieve a 50-year durability performance.  Refer to SELECTIONS.

Radiata Pine H3.2 square dressed battens, 40mm deep x 45mm wide and 45mm deep x 40mm wide, height to match timber framing studs.  To NZS 3602, table 1, reference 1D.10, Requirements for wood-based building components to achieve a 50-year durability performance.  Refer to SELECTIONS.

Aluminium, PVC or stainless-steel cavity closure strip, punched with 3mm - 5mm holes or slots to provide a minimum ventilation opening area of 1000mm² per lineal metre of wall.  Length and width to suit cavity.  To NZBC E2/AS1: clause 9.1.8.3 and figure 66.

Hermpac Crown, Rose or Flat Head, Annular Grooved Silicon bronze fixings to NZBC E2/AS1 Table 24.  Refer to Hermpac Construction Drawings for fixing details and to SELECTIONS for fixing sizes.

Hermpac Crown, Rose or Flat Head, Annular Grooved Grade 316 Stainless steel fixings to NZBC E2/AS1 Table 24.  Refer to Hermpac Construction Drawings for fixing details and to SELECTIONS for fixing sizes.

Hermpac Starcap Grade 316 Stainless Steel or Bronzed Stainless Steel  fixings to NZBC E2/AS1 Table 24. Refer to Hermpac Construction Drawings for fixing details and to SELECTIONS for fixing sizes.

Hermpac Jolt Head, Annular Grooved Grade 316 Stainless Steel fixings to NZBC E2/AS1 Table 24.  Refer to Hermpac Construction Drawings for fixing details and to SELECTIONS for fixing sizes.

Hermpac Proprietary 40 x 2.0mm, 50 x 2.0mm and 27 x 2.0mm Clinch Nail, Annular Grooved Grade 316 Stainless Steel.

To NZBC E2/AS1, 4.0 Flashings.  Material, grade and colour as detailed and scheduled and to NZBC E2/AS1; Table 21: Compatibility of materials in contact and Table 22: Compatibility of materials subject to run-off.  Ensure that materials used for flashings are compatible with the window frame materials and fixings and cladding materials and fixings.

To NZBC E2/AS1, 4.0 Flashings.  Machine folded stainless steel/zinc coated steel sheet to profile of weatherboard and mitred corner joints.  To NZBC E2/AS1; Table 21: Compatibility of materials in contact and Table 22: Compatibility of materials subject to run-off.  Ensure that materials used for soakers are compatible with adjacent materials and fixings, cladding materials and fixings.

To NZBC E2/AS1, 4.0 Flashings.  Machine folded half-hard copper sheet to profile of weatherboard and mitred corner joints. To NZBC E2/AS1; Table 21: Compatibility of materials in contact and table 22: Compatibility of materials subject to run-off.  Ensure that materials used for Soakers are compatible with adjacent materials and fixings and cladding materials and fixings.

Flood Coat Inundation:  Factory application of selected oil based stain finishes by flood inundation and enhanced penetration of timber surface by roller pressure and fibre saturation.

Refer to:  www.hermpac.co.nz/our-products/coatings

Site applications to manufacturers specifications. All Hermpac weatherboards and mouldings must be coated all six sides prior to installation.

Factory spray application of premium primer and undercoat.  Option also available for first finishing coat on to pre-primed and undercoated timber surface.

Refer to www.hermpac.co.nz/our-products/coatings

Coating applications to manufacturers specifications.  All Hermpac weatherboards and mouldings must be coated with a specified coating system on all six sides prior to installation.  Refer to SELECTIONS.

Execution to NZBC E2/AS1: 3.0 Weathertightness risk factors, and 9.0 Wall claddings, 9.1.8 Drained cavities and 9.4 Timber weatherboards.

Take delivery of Hermpac timber products, dry, unmarked and undamaged from freight and handling (Grade characteristics excluded).  Stack Hermpac weatherboards flat and true, clear of the ground by a minimum of 150mm and supported on dry, clean timber bearers at maximum 900mm centres.  Keep weatherboards dry at all times, either by storing within an enclosed building, or when stored externally place an additional secondary cover on the plastic wrapping.  Care must be taken to avoid damage to weatherboard edges and surfaces.

Before starting fixing ensure that the substrate conforms with NZS 3604, section 2, table 2.1, Timber framing tolerances and the requirements of NZS 3604, section 6, Foundation and subfloor framing, and NZBC E2/AS1, 9.4 Timber weatherboards, governing support for timber board cladding.

If not pre-finished before delivery, prepare and coat all faces and edges with one coat of premium wood oil or oil stain to coating manufacturers specifications, immediately the block stack is opened.

Open stack each board to dry with the back facing down, ensuring faces remain well finished, untouched and unblemished.  Once dry, place boards in fillet stack, laid flat and true, until fixed.  Keep dry and undamaged.

Apply a second coat to  the boards once they have been installed.  Coating time frames for oils/stains will vary.  Check time frame requirements for the second coat with the coating manufacturer.

If not pre-primed and/or undercoated before delivery, prepare and coat all faces and edges with one coat of primer and then once dry-to-re-coat, apply one coat of a primer undercoat.  Consult with the nominated paint manufacturer for specification on paint system for the timber specified.   Open stack each board to dry with the back facing down, ensuring faces remain well finished, untouched and unblemished.  Once dry, place boards in fillet stack, laid flat and true, until fixed.  Keep dry and undamaged.  Allow to re-coat if exposed for more than one month before the final coating is applied.

Fit cavity battens over wall underlay vertically, centred over studs and nail tack in place at 600mm maximum centres.

Fit cavity battens over wall underlay vertically, centred over studs.  Permanently fix battens using 304 stainless steel screws at 600mm maximum centres, with 25mm minimum fixing penetration into framing.

Refer to Hermpac Cavity System Installation Specification.  Seal the top of the cavity and install cavity closer/vermin-proofing at base of walls, open horizontal (or raking) junctions, over openings (windows, meters etc).  Use cavity spacers where fixing is required between cavity battens.

Confirm that exterior wall openings have been prepared ready for the installation of all window and door frames and other penetrations through the cladding.  Required preparatory work includes the following:

• wall underlay to openings finished and dressed off ready for the installation of window and door frames and other penetrations
• claddings neatly finished off to all sides of openings
• installation of flashings (those required to be installed prior to installation of penetrating elements).

Hermpac Construction Drawings call for a compressible bond breaker closed cell PVC foam seal to NZBC E2/AS1 9.1.10.7.

Use a string line, laser or mechanical device to set out all fixing that will be visible in the finished work.  Align accurately in straight lines.  Refer to relevant Hermpac Installation Specification and Construction Drawings to establish correct angle of fixing and consistent, accurate placement relative to visible edge of board.

Install level, true to line and face, to NZBC E2/AS1: 9.4 Timber weatherboards.  Double coat all cut ends before fixing.  Provide one face fixing per weatherboard at each cavity batten over stud location.  Pilot drill all fixings slightly smaller than gauge of fixing to ensure a snug fit and to minimise risk of moisture entry.  Finish the heads of Hermpac Crown, Rose and Flat head nails or Hermpac Starcap screws flush onto and not into the board surface.  Do not over drive the nai/screw head and crush the timber surface beneath and surrounding the nail/screw.

Install level, true to line and face, to NZBC E2/AS1: 9.4 Timber weatherboards.  Double coat all cut ends before fixing.  Provide one face fixing per weatherboard at each cavity batten over stud location.  Pilot drill all fixings slightly smaller than gauge of fixing to ensure a snug fit and to minimise risk of moisture entry.  When using stainless steel jolt head nails, punch all fixings and prime all raw, exposed timber surfaces.  Using an appropriate primer and filler, fill all nail holes flush with board surface.

Hermpac Western Red Cedar, Yellow Cedar, DuraLarch™ or AshinDura™ weatherboards fixed with Hermpac Crown, Rose and Flat Head nails or Hermpac Starcap screws and Kanda weatherboards fixed with Hermpac Starcap screws, are limited to use in NZS 3604 Wind Zones up to and including Extra High when studs are at maximum 600mm centres.

Hermpac Western Red Cedar weatherboards fixed with jolt head nails are limited to use in NZS 3604 Wind Zones up to and including Medium when studs are at maximum 600mm centres, and NZS 3604 Wind Zones up to and including Very High when studs are at maximum 400mm centres.

Hermpac Yellow Cedar, DuraLarch™ and AshinDura™ weatherboards fixed with jolt head nails are limited to use in NZS 3604 Wind Zones up to and including Extra High when studs are at maximum 600mm centres.

Refer to Hermpac Construction Drawings for fixing details and to SELECTIONS for fixing sizes.

Install level, true to line and face, to NZBC E2/AS1: 9.4 Timber weatherboards.  Single face fix weatherboards to every fixing point, clear of the adjacent lapped board.  Fixing to be driven in with a slightly upward slope.  Line fixings vertically across the boards.  Pilot drill all fixings slightly smaller than gauge of fixing to ensure a snug fit and to minimise risk of moisture entry.   Refer to Hermpac Construction Drawings for accurate weatherboard fixing information.

Using a Hermpac specialty clinch nail, restrain the top edge of the Rebated Bevel Back by driving the clinch nail positioned hard up against the edge but not into the Rebated Bevel Back weatherboard. Drive the clinch nail into the frame so that the clinch head settles flush into the weatherboard’s surface, prior to the next row of boards being fixed above (studs at maximum 600mm centres).  The clinch nail head must not sit proud of the timber surface nor prevent the correct separation of each adjacent row of boards.

Refer to Hermpac Construction Drawings and Installation Specification for suitable face fixings (options include Hermpac Silicon Bronze nails or Grade 316 Stainless Steel nails or Starcap screws.  Kanda weatherboards are fixed with Hermpac Starcap screws), correct placement of fixings, size, length and minimum penetration requirements, and for external and internal corner construction and fixing details.

Install level, true to line and face, to NZBC E2/AS1: 9.4 Timber weatherboards.  Single face fix weatherboards to every fixing point, clear of the adjacent lapped board.  Fixing to be driven in with a slightly upward slope.  Line fixings vertically across the boards.  Pilot drill all fixings slightly smaller than gauge of fixing to ensure a snug fit and to minimise risk of moisture entry.  Refer to Hermpac Construction Drawings for accurate weatherboard fixing information.

Using a Hermpac specialty clinch nail, prior to the next row of Rusticated, Splaycut or Multi-Splay boards being fixed alongside (studs at maximum 600mm centres) and at a position hard up against but not into the hidden lap board edge at every fixing point,  restrain the hidden lap tongue by driving the clinch nail into the frame so that the clinch head settles flush into the weatherboard's surface.  The clinch nail head must not sit proud of the timber surface nor prevent the correct separation of each adjacent row of boards.

Refer to Hermpac Construction Drawings and Installation Specification for suitable face fixings (options include Hermpac Silicon Bronze nails or Grade 316 Stainless Steel nails or Starcap screws), correct placement of fixings, size, length and minimum penetration requirements, and for external and internal corner construction and fixing details.

Install flashings, covers and soakers as detailed on the drawings and to NZBC E2/AS1.

Ensure the work is complete with all flashings, finishings and trim properly installed so the cladding system is completely weathertight.

Replace all damaged or marked elements.

Leave work to the standard required for following procedures.

Remove all debris, unused materials and elements from the site.

The following timber from sourced to installed to be FSC COC Certified.

Delivery notes and/or invoices must clearly show the FSC-COC Certificate Code of the company supplying the product, and the FSC Claim against the relevant product  description: eg FSC 100%, FSC Mix, FSC Mix Credit or FSC Recycled.

The following timber from sourced to installed to be PEFC COC Certified.

Delivery notes and/or invoices must clearly show the PEFC-COC Certificate Code of the company supplying the product, and the PEFC Claim against the relevant product description: e.g. PEFC 100%, PEFC Mix.