4221HH
HERMPAC HORIZONTAL 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 Horizontal 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

BRANZ BU 582

Structurally fixed cavity battens

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 publication

Selecting wall claddings

BRANZ Good practice guide - Timber cladding

1.4
MANUFACTURER/SUPPLIER DOCUMENTS

Hermpac Construction Drawings:

Hermpac Bevelback & Rebated Bevelback Weatherboard Cavity System Installation Specifications

Hermpac Bevelback & Rebated Bevelback Weatherboard Direct Fix System Installation Specifications

Quality Assurance Checklist - Hermpac Bevelback and Rebated Bevelback Weatherboard Cavity System

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

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

Quality Assurance Checklist - Hermpac Rusticated, Splaycut & Multi-Splay 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 524 - Cavity Batten System

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

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

CodeMark Certificate of Conformity for Hermpac Rusticated, Splaycut and Multi-Splay Weatherboard Cavity System Certificate Number GM-CM30037-RevG

CodeMark Certificate of Conformity for Hermpac Bevelback & Rebated Bevelback Weatherboard Cavity System Certificate Number GM-CM30038-RevG

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 has 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/AS1 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.

N.B.  To meet the provisions of NZBC B2/AS1Durability, Ashin-Dura™ must be treated to H3.1 and painted.  This product is supplied by Hermpac treated to H3.1, pre-primed and undercoated (via Machinecoat NZ) with top coats applied on site.

2.5
HORIZONTAL WEATHERBOARDS

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 Finger-Joint (CEDARONE) and Ashin-Dura™, pre-primed and undercoated, sanded and/or de-nibbed/buffed between coats.

2.6
COVER BOARDS, 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
RADIATA PINE EXTERIOR CAVITY WALL BATTENS - NON STRUCTURALLY FIXED

Radiata Pine H3.1 or H3.2 minimum 20mm thickness, width and height to match timber framing studs.  Temporary fix battens before being fixed into the framing with the cladding fixings.  Treatment to NZBC B2/AS1 and NZS 3602, table 1, reference 1D.10, Requirements for wood-based building components to achieve a 50-year durability performance.

Delete this clause if specifying Cavibat.

2.10
RADIATA PINE EXTERIOR CAVITY WALL BATTENS - STRUCTURALLY FIXED

Radiata Pine H3.1 or H3.2 battens, minimum 20mm thickness, width and height to match timber framing studs.  Structurally fix Radiata Pine cavity battens to BRANZ BU 582, part 4.2.  To NZS 3602, table 1, reference 1D.10, Requirements for wood-based building components to achieve a 50-year durability performance.

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 Radiata Pine H3.1 or H3.2 battens.

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.

Clinch nail to be used to retain hidden lap tongues of rebated and shiplap weatherboard 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.

2.18
SOAKERS, STAINLESS STEEL / COLORSTEEL ZINCALUME / ALUMINIUM / ETCH PRIMED ALUMINIUM

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.

Etch primed Aluminium soakers (flat and corner soakers) are available for paint finished weatherboards.

2.19
SOAKERS, COPPER

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.

Check compatibility of soakers to site exposure elements, chosen timber and timber treatment.  Modify as appropriate.

Finishes

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

2.20
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.

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

Delete sections not relevant to contract.

2.21
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 sections not relevant to contract.

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

2.22
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 sections not relevant to contract.

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

2.23
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 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.

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.

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.  Coat to suit the paint system specified in painting sections.  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 - horizontal cladding over cavity battens
3.6
RADIATA PINE BATTEN DRAINED CAVITY - NON STRUCTURALLY FIXED

Install 20mm minimum thickness drained cavity to NZBC E2/AS1: 9.0 Wall claddings, where required.  The Radiata Pine 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.

Options include; 20x45mm, 40x45mm or 45x40mm square batten.

Delete this clause if using another option or direct fixed.

3.7
RADIATA PINE BATTEN DRAINED CAVITY - STRUCTURALLY FIXED

Install 20mm minimum thickness drained cavity to NZBC E2/AS1: 9.0 Wall claddings, where required.  The Radiata Pine battens are permanently fixed using grade 304 Hermpac stainless steel Hex head screws ensuring minimum 25mm penetration into framing or as per BRANZ BU582 Structurally fixed cavity battens.

Options include; 20x45mm, 40x45mm or 45x40mm square batten.

Delete this clause if using another option or direct fixed.

For structurally fixed battens to Blockwork, Steel Framing, Concrete or other substrates 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.

Delete this clause if using another 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
SETOUT

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.

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 minimize 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 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 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 studs are at maximum 600mm 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 this clause 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 BEVEL BACK & REBATED BEVEL BACK 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 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 external and internal corner construction and fixing details.

3.15
FIXING RUSTICATED, SPLAYCUT & MULTI-SPLAY 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 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 website 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 external and internal corner construction and fixing details.

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 Credit / Fsc 100%

FSC Classification:

W5.2 Solid Wood Boards

Product/type:

Hermpac Weatherboards- Horizontal, boxed corners, cover boards, scribers, fascias

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 WEATHERBOARDS - HORIZONTAL

Location:

~

Species:

HERMPAC Western Red Cedar

Grade:

HERMPAC Premium Clears No.1 (PC1)

Profile Number/Series:

~

Profile type:

~

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

Grade options:

HERMPAC WRC PremSelect, 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 specified nominated alternative custom profile - Series numbers SH1-6 or SH20-25.

Profile type options:

Bevelback, Rebated Bevelback, Rusticated, Splaycut or Multi-Splay.

Cavity Fixing System:

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 seen edges of the profile for paint to adhere.

Moisture content:

Refer to NZS 3602 Table 4.

4.3
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, HP202

Scriber:

HP11 - HP18

Surface finish:

Band Sawn Face (BSF)

Paint Quality (PQ) Finish Required:

~

Moisture content:

≤18% at fixing

Alternative species:

DuraLarch™ - limited profiles - refer Hermpac for confirmation.

Grade:

HERMPAC WRC Prem Select, Premium Clears No.2 (PC2), Vertical Grain Finger Joint (CedarOne),  HERMPAC DURALARCH EKF1.

Profile options:

Select Standard and Custom Profiles from website or Hermpac Profiles Chart Vol. 4 or specify 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 seen edges of the profile for paint to adhere.

Moisture content:

Refer to NZS 3602 Table 4.

External corner options:

HP40, HP42, HP201, HP202, HP310, HP321, Corner Soakers

Internal corner options:

HP41, HP110, HP201, HP202, HP360, HP370, CP2828

4.4
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 DuraLarch™ (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.

4.5
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.

4.6
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.

4.7
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.

4.8
WEATHERBOARD FASTENINGS - CLINCH NAILS

Nails:

Clinch nails

Type:

Grade 316 stainless steel

Size:

~mm x 2.0mm

Options include 40mm, 50mm, 27mm.

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

Recommended for all Rusticated and Multi-Splay installations.

4.9
RADIATA PINE EXTERIOR CAVITY WALL BATTENS - NON STRUCTURALLY FIXED

Product:

Radiata Pine Batten

Material:

H3.1 or H3.2 Radiata Pine

Size:

Min. 45mm wide x 20mm thick

Fixings:

Hot dipped galvanized nails

Fixing size:

40mm x 2.0mm

Options:

Cavibat 40mm x 18mm extruded polypropylene fluted batten, Radiata Pine 45 x 40mm and 40 x 45mm H3.2 square dressed 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 option.

4.10
RADIATA PINE EXTERIOR CAVITY WALL BATTENS - STRUCTURALLY FIXED

Product:

Radiata Pine Batten

Material:

H3.1 or H3.2 Radiata Pine

Size:

Min. 45mm wide x 40mm thick

Fixings:

Grade 304 Stainless steel Hex head screws

Fixing size:

~

Options:

Radiata Pine 45 x 40mm or 40 x 45mm square dressed batten.

Fixing size:

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

Delete if using direct fixing method or non structurally fixed options.

4.11
CAVIBAT EXTERIOR CAVITY WALL BATTENS - NON STRUCTURAL

Product:

Cavibat non-structural cavity batten

Material:

Extruded fluted polypropylene

Size:

40mm wide x 18mm thick

4.12
SIGMA CAVITY CLOSER/VERMIN-PROOFING

Brand/type:

Sigma cavity closure

Material:

Aluminium

Options:

PVC or Stainless steel

Delete if using direct fixing method.

4.13
HERMPAC INTERNAL AND EXTERNAL CORNER BACK FLASHINGS

Material:

Aluminium

Size:

~

Length:

2.4 or 3.0m lengths

Type:

Unhemmed

Size options:

75 x 75mm, 100 x 100mm, 140 x 140mm, To suit specified corners, refer to Hermpac construction drawings for size requirements.

Type option:

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

4.14
CORNER AND JOINT SOAKERS

Location:

External corners / board ends

Material:

~

Finish:

~

Material selection:

Copper, Stainless steel or Colorsteel on Zincalume.  Etch primed aluminium corner and joint soakers available for use with paint finished weatherboards.

 

For Bevel Back, Rebated Bevel Back, Splaycut and Multi-Splay weatherboards only.

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:

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

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

Brand/type:

Refer to painting sections

Can be factory applied, via Machinecoat NZ Ltd, check with Hermpac

4.20
SITE COATING - FINISH COATS - PAINT

Brand/type:

Refer to painting sections

First finish/top coat can be factory applied, via Machinecoat NZ Ltd, check with Hermpac