4221HV
HERMPAC VERTICAL CLADDING SYSTEM
1
GENERAL

If you have pre-customised this work section using the "questions and answers" provided as part of the downloading process, it may be necessary to amend some clauses to suit the final project-specific version.

 

The section must still be checked and customised to suit the project being specified, by removing any other irrelevant details and adding project-specific details and selections.

 

This section relates to the supply and fixing of Hermpac Vertical cladding:

Modify or extend the above description to suit the project being specified.

 

Clauses for pre-priming under paint finish and pre-coating under clear or semi-transparent finishes are included here.

1.1
RELATED WORK

Refer to painting sections for finishes to weatherboard cladding.

Include cross references to other sections where these contain related work.

1.2
ABBREVIATIONS AND DEFINITIONS

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

 

The following abbreviations apply specifically to this section:

FSC®

Forest Stewardship Council®

COC

Chain of Custody

PEFC

Programme for the Endorsement of Forest Certification

CSA

Canadian Standards Association (International Standards)

SFI

Sustainable Forestry Initiative

Documents
1.3
DOCUMENTS

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

NZBC B2/AS1

Durability

NZBC E2/AS1

External moisture

NZS 3602

Timber and wood-based products for use in building

NZS 3604

Timber-framed buildings

NZS 3617

Profiles of weatherboards, fascia boards and flooring

Delete from the DOCUMENTS clause any document not cited.  List any additional cited documents.

The following are related documents and if referred to in the work section need to be added to the list of DOCUMENTS.

NZS 3640

Chemical preservation of round and sawn timber

WGANZ - Window Installation Guide

Guide to Window Installation as described in E2/AS1 Amendment 7

BRANZ BU 411

Recommended Timber Cladding Profiles

BRANZ BU 468

Fixing timber weatherboards

BRANZ BU 519

Fasteners selection

BRANZ BU 526

Specifying timber

BRANZ BU 567

E2/AS1 Flashing Requirements

BRANZ BU 570

Ground clearances

BRANZ BU 575

Timber treatment

BRANZ BU 582

Structurally fixed cavity battens

BRANZ publication

Selecting wall claddings

BRANZ Good practice guide - Timber cladding

1.4
MANUFACTURER/SUPPLIER DOCUMENTS

Hermpac Construction Drawings

Hermpac VertiLine Vertical Shiplap Weatherboard Cavity System installation specifications

Hermpac Vertical Shiplap Weatherboard Direct Fix System Installation Specifications

Quality Assurance Checklist - Hermpac VertiLine Vertical Shiplap Weatherboard Cavity System

Hermpac Board and Batten Weatherboard Cavity System Installation Specifications

Hermpac Board and Batten Weatherboard Direct Fix System Installation Specifications

Quality Assurance Checklist - Hermpac Board and Batten Weatherboard Cavity System

 

Hermpac Standard and Custom profiles

Hermpac Profile Portfolio

Hermpac Grade descriptions

Hermpac Nail fixings

Hermpac Legal and / or Sustainable Certification

Hermpac Product Technical Statement

Machinecoat - Flood Coat Inundation versus Spray Application

Maintenance of selected Wood Oil/Oil Based Stain Finishes

 

BRANZ Appraisal 650 - Hermpac VertiLine Vertical Shiplap Weatherboard Cavity System

BRANZ Appraisal 828 - Hermpac Board and Batten Cavity System

BRANZ Appraisal 524 - Cavibat Cavity Battens

CodeMark Certificate of Conformity for Hermpac VertiLine Vertical Shiplap Weatherboard Cavity System Certificate Number GM-CM30036-RevG

Hermpac Limited - FSC Licence No FSC-C102539, Certificate Code SGS-COC-008082, expires 30 Nov 2019

PEFC Forestry Sustainable Certification - contact Hermpac Limited

List documents relating to this part of the work, i.e. technical product/system specifications, test reports, appraisals, certification, etc. Normally they will be referred to in the text by the abbreviated title.

Technical profile drawings and timber species samples (raw or coated) are available on request from Hermpac Ltd.  Contact technical@hermpac.co.nz.

 

Manufacturer/supplier contact details:

Company:

Hermpac Ltd

Contacts:

Kyle Deans - 021 771 857, kyle.deans@hermpac.co.nz

 

Carmen Hansen - 027 809 4588, carmen@hermpac.co.nz

Web:

www.hermpac.co.nz

Email:

technical@hermpac.co.nz

 

information@hermpac.co.nz

Telephone:

09 421 9840 Auckland

 

04 586 9674 Wellington

 

03 341 2163 Christchurch

It is important to ensure that all personnel on site have access to accurate, up to date technical information on the many products, materials and equipment used on a project.  In most cases individual products are not used in isolation, but form part of a building process.  Also a particular manufacturer's and/or supplier's requirements for handling, storage, preparation, installation, finishing and protection of their product can vary from what might be considered the norm.  Access to technical information can help overcome this potential problem.

Requirements

1.5
FSC CERTIFIED RESPONSIBLY SOURCED TIMBER

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

Hermpac Limited - FSC Licence No FSC-C102539, Certificate Code SGS-COC-008082, expires 30 Nov 2019

PEFC Forestry Sustainable Certification - contact Hermpac Limited

Only use if a high level of sustainability is required, delete clause if not.  Modify clause if required

Performance

Note that in using the next clause you are setting a standard of performance for the contractor to meet.  Specifiers should therefore consider adding some means of confirming (say by testing or certification) that the performance criteria will be or have been met.

1.6
FIXINGS, WIND

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.

1.7
PERFORMANCE

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

Refer to later EXECUTION clause on co-operating with others on the installation of elements which penetrate the cladding system; including windows and doors, sundry elements fixed through the cladding surface, service pipework, etc.

2
PRODUCTS

Select the product that suits the brief and use the PRODUCTS and EXECUTION clauses that follow to suit the product selected.

Materials
2.1
FSC CERTIFIED TIMBER

Refer to SELECTIONS for details of amount, type, suppliers.

Certified responsibly sourced FSC-COC Certified timber from forest to installation.  Contractor to obtain timber supplier's FSC-COC certificate, delivery notes and/or invoices showing FSC-COC code and FSC Claim identified against product item(s).  Also include signed FSC outsourcing agreements between parties (eg FSC timber broker and non-FSC door joiner) if applicable.

Hermpac Limited - FSC Licence No FSC-C102539, Certificate Code SGS-COC-008082, expires 30 Nov 2019

PEFC Forestry Sustainable Certification - contact Hermpac Limited

Only use if a high level of sustainability is required, delete clause if not.  Modify clause if required. Check local supply capabilities.

Co-ordinate with other related timber work sections.

2.2
WESTERN RED CEDAR

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).

Refer to website for Hermpac's policy on sustainability and for links to suppliers websites and forest management goals and policies.

Delete this clause if not required.

2.3
DURALARCH

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).  Refer to website for Hermpac's policy on sustainability and for links to suppliers websites and forest management goals and policies.

Delete this clause if not required.

2.4
ASHIN-DURA

Hermpac Ashin-Dura™ (Tsuga heterophylla) harvested from the sustainable managed forests of British Columbia, Canada.  Hermpac Ashin-Dura™ is supplied from forest sources, certified legal and sustainable under one or more independent third party verified certification systems (PEFC, CSA, SFI or FSC).  Ashin-Dura™ specific to Hermpac.

Refer to website for Hermpac's policy on sustainability and for links to suppliers websites and forest management goals and policies.

Delete this clause if not required.

NB;  To meet the provisions of the New Zealand Building Code (clause B2: Durability) Ashin-Dura™ must be treated and painted. This product is supplied by Hermpac treated, pre-primed and undercoated (via Machinecoat NZ), with top coats being applied on-site.

2.5
VERTICAL SHIPLAP / VERTICAL BOARD AND BATTEN

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 relevant 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:

  • Vertical Standard Shiplap and Hermpac Custom Profiles
  • Vertical Standard Board and Batten and Hermpac Custom Profiles

 

A selection of the above profiles are also available in Western Red Cedar Finger-Joint (CEDARONE) and Ashin-Dura™ pre-primed and undercoated, sanded and/or de-nibbed/buffed between coats.

2.6
COVER BOARDS, SMART CORNERS, MOULDINGS AND SCRIBERS

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.

2.7
FASCIA BOARDS

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.

2.8
WALL UNDERLAYS

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

2.9
VERTIBAT EXTERIOR CAVITY WALL BATTENS - NON STRUCTURALLY FIXED

Vertibat Radiata Pine H3.1 or H3.2 castellated and double bevelled cavity batten.

Note: Vertibat Radiata Pine batten - Treatment to NZBC B2/AS1 and NZS 3602, Table 1, reference 1D.10.  Hermpac Vertibat H3.2 cavity battens are Micropro treated.

Delete this clause if specifying Cavibat.

2.10
VERTIBAT EXTERIOR CAVITY WALL BATTENS - STRUCTURALLY FIXED

Vertibat Radiata Pine H3.1 or H3.2 castellated and double bevelled cavity batten.

Note: Vertibat Radiata Pine batten - Treatment to NZBC B2/AS1 and NZS 3602, Table 1, reference 1D.10.  Hermpac Vertibat H3.2 cavity battens are Micropro treated.

Use this clause when specifying exterior timber cavity battens in potentially vulnerable situations, where required by NZBC E2/AS1 table 3, or battening over concrete or concrete block walls.

2.11
CAVIBAT EXTERIOR CAVITY WALL BATTENS - NON STRUCTURALLY FIXED

Cavibat extruded fluted polypropylene cavity batten system.  Refer to BRANZ Appraisal 524.

Delete this clause if specifying Vertibat.

2.12
EXTERIOR CAVITY CLOSER/VERMIN-PROOFING

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.

Delete this clause if specifying direct fix.

Components
2.13
NAILS, SILICON BRONZE

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.

Delete if specifying Stainless Steel nails.

2.14
NAILS, STAINLESS STEEL

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.

Delete if specifying Silicon Bronze nails.

2.15
JOLT HEAD NAILS, STAINLESS STEEL

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.

Delete if specifying a stain or oil finished weatherboard.

2.16
CLINCH NAILS, STAINLESS STEEL

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

Use clinch nails to retain hidden lap tongues of vertical shiplap weatherboard profiles.  Can also be used with Board and Batten profiles.

2.17
FLASHINGS

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.

Finishes

The following clauses relate to priming and/or pre-staining which is often carried out by others before the painter arrives on site.  Ensure that selections made are compatible with later paint/stain/oil systems.

2.18
FACTORY PRE-FINISHING - MACHINECOAT (NZ) - PENETRATING WOOD OIL / OIL BASED STAIN

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

 

Wood X:

Penetrating wood oil - exclusive Machinecoat (NZ) factory formulation, standard and custom colour range.

Resene:

Machinecoat (NZ) Waterborne Woodsman oil stain - exclusive pigment and fungicide enriched factory formulation.

 

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

Refer to Machinecoat (NZ) Ltd for colours and coating types.

Delete clause if not relevant to contract.

2.19
FACTORY PRE-FINISHING - MACHINECOAT (NZ) PAINT - AIR DRIED TIMBER

Premium Acrylic Primer, Premium Alkyd Undercoat, Premium Acrylic base Top coat.

Factory spray application of selected solvent based oil primer and undercoat starter coats and / or acrylic base finish coat on to timber surface.

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

 

Primer Colour:

Hermpac White or as specified by special contract.

 

Undercoat Colour:

Hermpac Off White or as specified by special contract.

 

Factory applied Starter coats:

Primary coat - Primer.

 

 

Secondary coat - Undercoat.

 

Factory applied Finish coats:

Refer to SELECTIONS.

 

Refer to Machinecoat (NZ) Ltd for colours and coating types.

Delete clause if not relevant to contract.

This finishing option can be applied to Western Red Cedar PC1, PC2 and PremSelect timber, or DuraLarch™, or Ashin-Dura™.

2.20
FACTORY PRE-FINISHING - MACHINECOAT (NZ) PAINT - KILN DRIED TIMBER

Premium Alkyd Primer and Undercoat, Premium Acrylic base Top coat.

Factory spray application of selected solvent based oil primer and undercoat starter coats and / or acrylic base finish coat on to timber surface.

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

 

Primer Colour:

Hermpac Beige or as specified by special contract.

 

Undercoat Colour:

Hermpac Off White or as specified by special contract.

 

Factory applied Starter coats:

Primary coat - Primer.

 

 

Secondary coat - Undercoat.

 

Factory applied Finish coats:

Refer to SELECTIONS.

 

Refer to Machinecoat (NZ) Ltd for colours and coating types.

Delete clause if not relevant to contract.

This finishing option can be applied to CedarOne (Finger Joint Western Red Cedar).

2.21
SITE APPLICATION OF WOOD OIL/OIL BASED STAIN & PAINTS

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

3
EXECUTION
Conditions
3.1
GENERALLY

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.

The BRANZ Good practice guide: Timber cladding is a comprehensive book providing guidance on a number of critical installation issues, particularly where the project is located in an exposed position.

3.2
STORAGE

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.

Modify this clause if boards are primed or sealed off-site.

3.3
SUBSTRATE

Before starting fixing ensure that the substrate conforms to 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.

Application - preparation
3.4
SITE STAINING - WOOD OIL/OIL STAIN FINISH

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.  Re-coat the boards once they have been installed.

Delete this clause if specifying paint finish.

3.5
SITE PRIMING AND UNDERCOAT - PAINT FINISH

If not pre-primed/undercoated before delivery, prepare and coat all faces and edges with one coat of premium oil based primer and then once dry-to-re-coat, apply one coat of a premium acrylic based primer undercoat to coating manufacturers specifications.   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.

Delete this clause if specifying wood oil/oil stain finish.

Application - vertical cladding over cavity battens
3.6
VERTIBAT DRAINED CAVITY / NON STRUCTURALLY FIXED

Install 20mm minimum thickness drained cavity to NZBC E2/AS1: 9.0 Wall claddings, where required.  The Vertibat battens are temporarily fixed over the wall underlay using galvanized nails and then firmly fixed by the cladding fixings which will penetrate the wall framing studs, nogs/dwangs.  Refer Hermpac Installation Specification for detailed fixing.

Options include:  V1 (45 x 20mm), V2 (70 x 20mm), V3 (45 x 40mm), V4 (70 x 40mm), V5 (45 x 45mm) and V6 (70 x 45mm).

Delete this clause if using Cavibat option.

3.7
VERTIBAT DRAINED CAVITY / STRUCTURALLY FIXED

Install 20mm minimum thickness drained cavity to NZBC E2/AS1: 9.0 Wall claddings, where required.  The Vertibat battens are permanently fixed using grade 304 Hermpac stainless steel Hex head screws ensuring minimum 25mm penetration into framing studs.  (Refer Hermpac Construction Drawings and Installation Specification for detailed structural fixing).

Options include:  V1 (45 x 20mm), V2 (70 x 20mm), V3 (45 x 40mm), V4 (70 x 40mm), V5 (45 x 45mm) and V6 (70 x 45mm).

For structurally fixed battens to Blockwork, Steel Framing, Concrete or other alternative substrate contact Hermpac for specification options.

3.8
CAVIBAT DRAINED CAVITY / NON STRUCTURALLY FIXED

Install Cavibat 18mm drained cavity.  Wall framing studs lined with Cavibat battens vertically and horizontally.  The Cavibat battens are temporarily fixed over the wall underlay using galvanized nails and then firmly fixed by the cladding fixings which will penetrate the wall framing studs, nogs/dwangs.  Refer Hermpac Installation Specification for detailed fixing.

 Delete this clause if using Vertibat option or direct fixed.

3.9
CAVITY CLOSER / VERMIN PROOFING

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.

Delete this clause if direct fixed.

3.10
PENETRATIONS

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.

Refer to the Window & Glass Association NZ (WGANZ) Window Installation Guide.  This covers the WGANZ recommendations on the preparation of window/door openings, minimum clearances between rough openings and the window/door frame, dressing of the wall underlay into the prepared opening, application of flexible flashing tape to the sill and top corners of the opening, installation of window/door frames and flashings, sealing of the window/door frame into the opening to create a pressure equalisation cavity, installation of flashings and the maintenance of appropriate clearances between the frame and the surrounding construction.

Penetrations through drained cavities to NZBC E2/AS1: External moisture, 9.1.9 Penetrations and 9.1.10 Windows and doors.

3.11
SET-OUT

Use a string line, laser or mechanical device to set out all nailing that will be visible in the finished work.  Align all nailing accurately in straight lines.  Refer to relevant Hermpac Installation Specification and Construction Drawings to establish correct angle of nail and consistent, accurate placement relative to visible edge of board.  For vertical shiplap boards, where possible the exposed lap should face away from the prevailing wind.

Application - fixing

These fixing clauses are written for general work.  Read BRANZ Good practice guide: "Timber cladding" and use them as a model for particular design and location requirements, and the relevant Hermpac Installation Specification before commencing installation.

3.12
FIXING - OIL / STAIN FINISH

Install level, true to line and face, to NZBC E2/AS1: 9.4 Timber weatherboards.  Double coat all cut ends before fixing.  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 flush onto and not into the board surface.  Do not over drive the nail head and crush the timber surface beneath and surrounding the nail.

Depending on personal preference and the type of nail head chosen "flush" may not accurately describe the desired finish for fixings; particularly where there is a danger of bruising the board surface.  Modify to suit the preferred method.

Delete if specifying paint finish.

3.13
FIXING - PAINT FINISH

Install level, true to line and face, to NZBC E2/AS1: 9.4 Timber weatherboards.  Double coat all cut ends before fixing.  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 weatherboards fixed with jolt head nails are limited to use in NZS 3604 Wind Zones up to and including Medium when dwangs or structurally fixed Vertibat cavity battens are at maximum 480mm centres, and NZS 3604 Wind Zones up to and including Very High when dwangs or structurally fixed Vertibat cavity battens are at maximum 400mm centres.

 

Hermpac DuraLarch™ and Ashin-Dura™ weatherboards fixed with jolt head nails are limited to use in NZS 3604 Wind Zones up to and including Extra High when dwangs or structurally fixed Vertibat cavity battens are at maximum 480mm centres.

 

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

 

When using Hermpac Crown, Rose or Flathead nails, flush fix heads onto and not into the board surface.  Do not over drive the nail head and crush the timber surface beneath and surrounding the nail.

Delete if specifying oil/stain finish.

Depending on personal preference and the type of nail head chosen "flush" may not accurately describe the desired finish for fixings; particularly where there is a danger of bruising the board surface.  Modify to suit the preferred method.

3.14
FIXING VERTICAL SHIPLAP WEATHERBOARDS

Install level, true to line and face, to NZBC E2/AS1: 9.4 Timber weatherboards.  Single nail weatherboards to every fixing point, just clear of the adjacent lapped board.  Nails to be driven in with a slightly upward slope.  Line nails horizontally 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 Vertical Shiplap boards being fixed alongside (nogs or dwangs at maximum 480mm 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 external and internal corner construction and fixing details.

Where wall surfaces are too high for a single board length, specify an appropriate flashing line and retain the requirement for "full length boards" in between flashing lines and/or wall openings.

3.15
FIXING BOARD AND BATTEN

Install level, true to line and face, to NZBC E2/AS1: 9.4 Timber weatherboards.  Nail at the centre of the board width (nogs at maximum 480mm centres).  Nails to be driven in with a slightly upward slope.  Line nails horizontally 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 website for accurate weatherboard fixing information.

 

Using a Hermpac 50 x 2.0mm speciality Clinch Nail, restrain both hidden Board edges by driving the Clinch Nail positioned hard up against the Board edge but not into the Board.  Drive the Clinch Nail into the frame so that the clinch head settles flush into the Board surface, prior to the Batten being fixed over top (nogs or dwangs at maximum 480mm centres).

 

Space boards with a 6-8mm gap for correct alignment of battens over each board beneath.  Nail the batten with a single fixing through the gap between boards at every fixing point.  Nails to be driven in with a slightly upward slope.  Line nails horizontally across the battens and boards.

 

Refer to Hermpac Construction Drawings and Installation Specification for external and internal corner construction and fixing details.

Where wall surfaces are too high for a single board length, specify an appropriate flashing line and retain the requirement for "full length boards" in between flashing lines and/or wall openings.

3.16
INSTALL FLASHINGS

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

3.17
COMPLETE

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

Completion
3.18
REPLACE

Replace all damaged or marked elements.

3.19
LEAVE

Leave work to the standard required for following procedures.

3.20
REMOVE

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

4
SELECTIONS

Substitutions are not permitted to the following, unless stated otherwise.  Contact technical@hermpac.co.nz for assistance or more information.

4.1
FSC CERTIFIED TIMBER - SOURCING

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.

 

ITEM

 

Manuf./supplier

Hermpac Limited

FSC COC Code:.

SGS-COC-008082   Expires on 30 Nov 2019

FSC Cert. No:

FSC-C102539.   Expires on 30 Nov 2019

FSC Label:

~

FSC Classification:

W5.2 Solid Wood Boards

Product:

~

Species:

Pinus Radiata

Origin country:

New Zealand

Amount:

~

ITEM

 

Manuf./supplier:

Identify manufacturer/supplier or supply chain, include contact details (or to be selected & advised by Contractor).

FSC COC Code:

FSC (& COC) Certificate number and expiry date

FSC Cert. No.:

Certificate number and expiry date

FSC Label:

FSC Mix / FSC 100%

FSC Classification:

W5.2 Solid Wood Boards

Product/type:

Hermpac Weatherboards- Vertical Shiplap, Board & Batten, boxed corners, cover boards, scribers, fascia

Timber species:

Pinus Radiata

Origin country:

New Zealand, or other country of forest origin

Amount:

All, ~% (of volume), ~m (linear), etc

Only use if a high level of sustainability is required, delete clause if not.  Modify clause if required.

Copy and paste more tables as required. Check local supply capabilities.

Co-ordinate with other related timber work sections.

4.2
HERMPAC - VERTICAL SHIPLAP

Location:

~

 

Species:

HERMPAC Western Red Cedar

 

Grade:

HERMPAC Premium Clears No.1 (PC1)

 

Profile Number/Series:

~

 

Profile type:

Vertical Shiplap

 

Cover dimensions:

~mm

 

Thickness:

~mm

 

Cavity Fixing system:

~

 

Surface finish:

Band Sawn Face (BSF)

 

Paint Quality (PQ) Finish Required:

~

 

Moisture content:

≤18 % at fixing

 

Alternative species:

DuraLarch™ and Ashin-Dura™ (limited profiles - refer Hermpac for confirmation).

Grade options:

HERMPAC WRC Prem Select, Premium Clears No.2 (PC2), Vertical Grain Finger Joint (CedarOne), HERMPAC DuraLarch™ (EKF1 and PC1), and Ashin-Dura™ (PC1, QS PQ).

Profile Number/Series options:

Select Standard  (HP) and Custom (CP) Profiles from website or Hermpac Profile Portfolio or specifed nominated alternative custom profile - Series numbers SV1-6 or SV20-25.

Cavity Fixing systems:

None (Direct fix), or over drained cavity (18mm, 20mm, 40mm, 45mm).

Surface finish options:

DF (Dressed Face), SF (Sanded Face - on the Broad Flat Face).  For oils and stains a bandsawn face finish is recommended.  However, if a dressed finish is preferred, Hermpac recommend specifying a Sanded Face finish (to gently raise timber fibres and allow better penetration of the coating).  For paint finished weatherboards a dressed face finish is recommended.

Paint Quality:

Yes/No.  If paint quality is required a small pencil round is machined to top edges of the profile for paint to adhere.

Moisture content:

Refer to NZS 3602 Table 4.

4.3
HERMPAC BOARD AND BATTEN

Location:

~

 

Species:

HERMPAC Western Red Cedar

 

Grade:

HERMPAC Premium Clears No.1 (PC1)

 

Profile Number/Series:

~

 

Profile type:

Board and Batten

 

Fixing system:

~

 

Board dimensions:

~mm x ~mm

 

Batten dimensions:

~mm x ~mm

 

Cavity fixing system:

~

 

Surface finish:

Band Sawn Face (BSF)

 

Paint Quality (PQ) Finish Required:

~

 

Moisture content:

≤18% at fixing

 

External corner battens:

HP201 and HP202

 

Internal corner battens:

HP201 and HP202

 

Alternative species:

DuraLarch™ and Ashi-Dura (limited profiles - refer Hermpac for confirmation).

Grade:

HERMPAC WRC Prem Select, Premium Clears No.2 (PC2), Vertical Grain Finger Joint (CedarOne), HERMPAC DuraLarch™ (EKF1 and PC1) and Ashin-Dura™ (PC1, QS PQ).

Profile Number/Series options:

Select Standard (HP) and Custom Profiles (CP) from website or Hermpac Profile Portfolio or specifed nominated alternative custom profile.  Series numbers BB10-16.

Cavity Fixing systems:

None, (Direct fix), or

 

over drained cavity (18mm, 20mm, 40mm, 45mm).

Surface finish options:

DF (Dressed Face), SF (Sanded Face - on the Broad Flat Face).  For oils and stains a bandsawn face finish is recommended.  However, if a dressed finish is preferred, Hermpac recommend specifying a Sanded Face finish (to gently raise timber fibres and allow better penetration of the coating).  For paint finished weatherboards a dressed face finish is recommended.

Paint Quality:

Yes/No.  If paint quality is required a small pencil round is machined to top edges of the profile for paint to adhere.

Moisture content:

Refer to NZS 3602 Table 4.

4.4
HERMPAC CORNER MOULDS, COVER BOARDS, BOXED CORNERS & SCRIBERS

Location:

~

 

Species:

HERMPAC Western Red Cedar

 

Grade:

HERMPAC Premium Clears No.1 (PC1)

 

External Corner Mould:

~

 

Internal Corner Mould:

~

 

Cover boards:

HP 201 and HP 202

 

Scriber:

HP11 - HP18

 

Surface finish:

Band Sawn Face (BSF)

 

Paint Quality (PQ) Finish Required:

~

 

Moisture content:

≤18% at fixing

 

Alternative species:

DuraLarch™ and Ashin-Dura™ (limited profiles - refer Hermpac for confirmation).

Grade:

HERMPAC WRC Prem Select, Premium Clears No.2 (PC2), Vertical Grain Finger Joint (CedarOne), HERMPAC DuraLarch™ (EKF1 and PC1) and Ashin-Dura™ (PC1, QS PQ).

Profile options:

Select Standard (HP) and Custom (CP) Profiles from website or Hermpac Profile Portfolio or specified nominated alternative custom profile (CP Profiles).

Surface finish options:

DF (Dressed Face), SF (Sanded Face - on the Broad Flat Face).

Paint Quality:

Yes/No.  If paint quality is required a small pencil round is machined to top edges of the profile for paint to adhere.

Moisture content:

Refer to NZS 3602 Table 4.

External corner mould options:

HP40, HP42, HP201, HP202, HP300, HP301, HP310, HP321, HP330, HP399

Internal corner mould options:

HP41, HP110, HP201, HP202, HP350, HP351, HP352, HP360, HP370, CP2828, HP399

4.5
HERMPAC FASCIA

Species:

HERMPAC Western Red Cedar

Grade:

HERMPAC Premium Clears No.1 (PC1)

Profile:

~

Surface finish:

Band Sawn Face (BSF).

Alternative species:

DuraLarch™ (limited profiles - refer Hermpac for confirmation).

Grade:

HERMPAC (EKF1 or PC1).

Profile Standard:

HP 69 (135mm x 18.5mm), HP 70 (180mm x 18.5mm.)

 

HP 71 (135mm x 28mm), HP 72 (180mm x 28mm).

 

HP 73 (230mm x 28mm).

Profile Custom:

Custom profiles from website, - some considerations apply.

Surface finish options:

DF (Dressed Face), SF (Sanded Face - on the Broad Flat Face).

Moisture content:

Refer to NZS 3602 Table 4.

4.6
WEATHERBOARD FASTENINGS - STAINLESS STEEL NAILS

Nails:

Crown Head

Type:

Grade 316 stainless steel

Size:~

 

Nail type options:

Rose Head, Flat Head.

Refer to Hermpac construction drawings for size and location of fixing.

Delete if using Silicon Bronze nails.

4.7
WEATHERBOARD FASTENINGS - SILICON BRONZE NAILS

Nails:

Crown Head

Type:

Silicon Bronze

Size:~

 

Nail type options:

Rose Head, Flat Head.

Refer to Hermpac construction drawings for size and location of fixing.

Delete if using Stainless Steel nails.

4.8
WEATHERBOARD FASTENINGS - STAINLESS STEEL JOLT HEAD NAILS

Nails:

Jolt Head

Type:

Grade 316 stainless steel

Size:

~

Refer to Hermpac construction drawings for size and location of fixing.

Jolt Head nails are usually used when paint finished weatherboards are specified.  Delete if not required.

4.9
WEATHERBOARD FASTENINGS - CLINCH NAILS

Nails:

Clinch nails

Type:

Grade 316 stainless steel

Size:

~mm x 2.0mm

Options include 40mm, 50mm and 27mm.

Refer to Hermpac construction drawings for size and location of fixing.

Recommended for all Vertical Shiplap Installations.

4.10
VERTIBAT CAVITY BATTENS - NON STRUCTURALLY FIXED

Product:

Vertibat (V1) castellated and double bevelled batten

Material:

H3.1 or H3.2 Radiata Pine

Size:

Min. 45mm wide x 20mm thick x 2700mm long

Fixings:

Hot dipped galvanized nails

Fixing size:

40mm x 2.0mm

Options:

Vertibat (V2) 70mm wide x 20mm thick, Vertibat (V3) 45mm wide x 40mm thick), Vertibat (V4) 70mm wide x 40mm thick, Vertibat (V5) 45mm wide x 45mm thick, or Vertibat (V6) 70mm wide x 45mm thick; or Cavibat 40mm x 18mm extruded polypropylene fluted batten.

Nail size option:

40mm x 2.5mm, 50mm x 2.8mm, 60mm x 2.8mm.

Delete if using direct fixing method or structurally fixed options.

4.11
VERTIBAT CAVITY BATTENS - STRUCTURALLY FIXED

Product:

Vertibat (V3) castellated and double bevelled batten

Material:

H3.1 or H3.2 Radiata Pine

Size:

45mm wide x 40mm thick x 2700mm long

Fixing:

Grade 304 Stainless steel Hex head screws

Fixing size:

~

 

Options:

45mm wide x 45mm thick (V5), 70mm wide x 20mm thick (V2), 45mm wide x 20mm thick (V1), 70mm wide x 40mm thick (V4), 70mm wide x 45mm thick (V6).

Fixing size:

12 gauge x 65mm long (for 40mm x 45mm battens), 12 gauge x 75mm long (for 45mm x 45mm battens)

Delete if using direct fix method or non-structurally fixed options.

4.12
CAVIBAT EXTERIOR CAVITY WALL BATTENS - NON STRUCTURAL

Product:

Cavibat non-structural cavity batten

Material:

extruded fluted polypropylene

Size:

40mm x 18mm

Delete if using direct fixing method.

Note:  Cavibat cannot be used as a structural batten.

4.13
SIGMA CAVITY CLOSER/VERMIN-PROOFING

Brand/type:

Sigma cavity closure

Material:

Aluminium

Options:

PVC or stainless steel

Delete if using direct fixing method.

4.14
HERMPAC INTERNAL AND EXTERNAL CORNER BACK FLASHINGS

Material:

Aluminium

Size:

~

Length:

~

Type:

Unhemmed

Size options:

To suit specified corners, refer to Hermpac construction drawings.

Length options:

2.4m or 3.0m length

Type options:

Hemmed - as per NZBC E2/AS1.  Note hemmed flashings are required in Extra High Wind Zone.

4.15
FACTORY FINISH COAT - WOOD OIL / OIL STAIN - FLOOD COAT INUNDATION

Brand:

Machinecoat (NZ) Ltd

 

Product:

Wood-X penetrating wood oil

 

Coating process:

Machinecoat (NZ) Ltd. Flood Coat Inundation

 

Colour:

~

 

Factory coats:

One

 

On site coats:

One, or as per coating manufacturers specification

 

Option:

Resene Waterborne Woodsman Oil Stain.  (Contact Hermpac for other options).

Factory coat option:

One coat only for Wood-X, two coat option available for Resene Waterborne Woodsman Oil Stain.

4.16
FACTORY FINISH COAT - ACRYLIC PRIMER, ALKYD UNDERCOAT - AIR DRIED TIMBER

Brand:

Machinecoat (NZ) Ltd

 

Product:

DULUX

 

Coating process:

Machinecoat (NZ) Ltd. Spray Application

 

Primer Colour:

HERMPAC White

 

Undercoat colour:

HERMPAC Off White

 

Factory coats - Primer:

One

 

Factory coats - Undercoat:

One

 

Surface Coating Type options:

Resene - Acrylic primer, Alkyd undercoat

Choose this factory finish for Western Red Cedar PC1, PC2, PremSelect, DuraLarch™, (EKF1 and PC1) and Ashin-Dura™.Delete or amend as required.

4.17
FACTORY FINISH COAT - ALKYD PRIMER AND UNDERCOAT - KILN DRIED TIMBER

Brand:

Machinecoat (NZ) Ltd

 

Product:

DULUX

 

Coating process:

Machinecoat (NZ) Ltd. Spray Application

 

Primer colour:

HERMPAC Beige

 

Undercoat colour:

HERMPAC Off White

 

Factory coats - Primer:

One

 

Factory coats - Undercoat:

One

 

Surface Coating Type options:

Resene Alkyd Primer

 

Resene Alkyd undercoat

Choose this factory finish for CedarOne (fingerjoint Western Red Cedar).

Delete or amend as required.

4.18
SITE COATING - PENETRATING WOOD OIL / OIL STAIN

Brand:

Wood-X penetrating wood oil

 

Colour:

~

 

On site manual coats:

Refer Manufacturers specifications

 

Option:

Resene Woodsman Oil Stain.  (Contact Hermpac for other options).

4.19
SITE COATING - ACRYLIC PRIMER, ALKYD UNDERCOAT - AIR DRIED TIMBER

Brand/type:

Refer to painting section/s

Can be factory applied, check with Hermpac.

4.20
SITE COATING - FINISH COATS - PAINT

Brand/type:

Refer to painting sections

First finish/top coat can be factory applied, check with Hermpac.