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.
For control of external fire spread refer to NZBC C/AS1, C/AS2 for requirements. For all risk groups other than SI care or detention) NZBC C/AS1, 5.4 Exterior surface finishes and C/AS2, 5.8 External cladding systems allow cladding materials to be exempt from testing if located at a distance greater than or equal to 1.0m from a relevant boundary with a building height less than 10m. For cladding material locations outside this scope refer to the appropriate acceptable solution for testing requirements (contact manufacturer to establish if testing has occurred).
In relation to fire rating requirements of external walls refer to NZBC C/AS1, 5.1 Fire resistance ratings or C/AS2, 5.3 FRRs of external walls as appropriate.
Refer to painting sections for finishes to weatherboard cladding.
Include cross references to other sections where these contain related work.
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 |
Programme for the Endorsement of Forest Certification | |
CSA | Canadian Standards Association (International Standards) |
SFI | Sustainable Forestry Initiative |
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 |
Timber and wood-based products for use in building | |
Timber-framed buildings | |
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.
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
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 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-RevI
CodeMark Certificate of Conformity for Hermpac Bevelback & Rebated Bevelback Weatherboard Cavity System Certificate Number GM-CM30038-RevI
Cavity System Certificate Number GM-CM30036-RevG
Hermpac Pacific Limited - FSC Licence No FSC-C102539, Certificate Code SGS-COC-008082, expires 30 Nov 2024
Hermpac Pacific Limited - PEFC Forestry Sustainable Certificate Code SGS-PEFC/COC-1212, expires 23 Nov 2021.
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: | |
Email: | technical@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
Abbreviations and definitions:
FSC 100%
FSC Controlled Wood
FSC Forest Management (FM) Certification
FSC Chain of Custody (COC) Certification
Organisation website details:
Forest Stewardship Council website:- https://nz.fsc.org/en-nz
Hermpac Pacific Limited - FSC COC Code: SGS-COC-008082 Expires 30 Nov 2024
Hermpac Pacific Limited: - FSC Licence Code: FSC-C102539 Expires 30 Nov 2024
If FSC certification is required, consultation with Hermpac at specification preparation stage is essential. Specie, profile and volumes may affect supply capabilities and/or result in extended lead times. Contact Hermpac – technical@hermpac.co.nz with the specific requirements of your project for current information. Co-ordinate with other related timber work sections. Modify clause if required. Delete if not required.
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
Hermpac Pacific Limited - PEFC Certificate Code SGS-PEFC/COC-1212, expires 23 Nov 2021.
Delete clause if not required. Modify clause if required
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.
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.
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.
Select the product that suits the brief and use the PRODUCTS and EXECUTION clauses that follow to suit the product selected.
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.
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).
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.
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.
NB: To meet the provisions of the New Zealand Building Code (clause B2: Durability) DuraLarch™ must be coated (oil, stain or paint).
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.
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, AshinDura™ 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.
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:
A selection of the above profiles are also available in Western Red Cedar Finger-Joint (CEDARONE) and AshinDura™, 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.
For flexible wall underlays, rigid wall underlays and rigid air barriers, refer to the appropriate separate section(s).
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.
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.
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.
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.
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.
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.
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.
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. Must be used with rusticated and Multi-splay weatherboards in ‘Extra High’wind zones and above
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.
Check compatibility of soakers to site exposure elements, chosen timber and timber treatment. Etch primed Aluminium soakers (flat and corner soakers) are available for paint finished weatherboards.Modify as appropriate.
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. Etch primed Aluminium soakers (flat and corner soakers) are available for paint finished weatherboards. Modify as appropriate.
The following clauses relate to priming and/or pre-staining/oiling often being carried out by others before the painter arrives on site. Ensure that selections made are compatible with later paint/stain/oil systems.
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 sections not relevant to contract.
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
Primer: | Hermpac White or as specified by special contract. |
|
Undercoat: | Hermpac Off White or as specified by special contract. |
|
Factory applied Finishing: | 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 or DuraLarch™.
CedarOne and AshinDura™ are always supplied pre-finished.
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.
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.
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.
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.
Delete this clause if specifying paint.
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.
Delete this clause if specifying wood oil/oil stain finish.
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.
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.
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 or galvanized or stainless steel finishing brads 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.
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.
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:
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.
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.
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 and Branz Appraisal before commencing installation. .
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. 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. 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.
Delete this clause if specifying oil/stain finish.
Hermpac Western Red Cedar, Yellow Cedar, DuraLarch™ or AshinDura™ weatherboards fixed with Hermpac Crown, Rose and Flat Head nails are limited to use in NZS 3604 Wind Zones up to and including Extra High 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.
Delete this clause if specifying oil/stain finish.
Install level, true to line and face, to NZBC E2/AS1: 9.4 Timber weatherboards. Single nail weatherboards to every fixing point, 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.
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.
Install level, true to line and face, to NZBC E2/AS1: 9.4 Timber weatherboards. Single nail weatherboards to every fixing point, 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, 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.
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
Install flashings, covers and soakers as detailed on the drawings and to NZBC E2/AS1.
If wall surface is too high for a single aluminium flashing length, Overlap by 75mm minimum.
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.
Substitutions are not permitted to the following, unless stated otherwise. Contact technical@hermpac.co.nz for assistance or more information.
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.
Species: | DuraLarch |
Manuf./supplier | Herman Pacific Limited (Hermpac) |
FSC COC Code:. | SGS-COC-008082 Expires Nov 2024 |
FSC Lic. Code: | FSC-C102539. Expires Nov 2024 |
FSC Claim: | ~ |
Product / type: | ~ |
Amount: | ~ |
FSC Claim: | |
Product/type: | Hermpac Weatherboards- Horizontal, boxed corners, cover boards, scribers, fascias |
Amount: | All, ~% (of volume), ~m (linear), etc |
If FSC certification is required, consultation with Hermpac at specification preparation stage is essential. Species, profile and volumes may affect supply capabilities and/or result in extended lead times. Contact Hermpac – technical@hermpac.co.nz with the specific requirements of your project for current information.
Co-ordinate with other related timber work sections.
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.
Species: | Western Red Cedar |
Manuf./supplier: | Herman Pacific Limited (Hermpac) |
PEFC COC Code: | SGS-PEFC/COC-1212 Expires on 23 Nov 2021 |
PEFC Claim: | ~ |
Product/type: | ~ |
Amount: | ~ |
Origin Country: | Canada |
Species: | Western Red Cedar, Yellow Cedar, AshinDura™ |
PEFC Claim: | |
Product/type: | Hermpac Weatherboards- Horizontal, boxed corners, cover boards, scribers, fascia |
Amount: | All, ~% (of volume), ~m (linear), etc |
Only use if a certificate of sustainability is required, delete clause if not. Modify clause if required.
Check local supply stock/capabilities as extended lead times may apply.
Copy and paste more tables as required.
Co-ordinate with other related timber work sections.
Location: | ~ |
Species: | ~ |
Grade: | ~ |
Profile Number/Series: | ~ |
Profile type: | ~ |
Cover dimensions: | ~mm |
Thickness: | ~mm |
Cavity Fixing System: | ~ |
Surface finish: | ~ |
Moisture content: | ≤18% at fixing |
Alternative species: | Western Red Cedar, Yellow Cedar, DuraLarch™ & AshinDura™ - (limited profiles - refer Hermpac for confirmation). |
Grade: | HERMPAC Premium Clears No.1 (PC1), HERMPAC WRC PremSelect, Premium Clears No.2 (PC2), Finger Joint (CedarOne), HERMPAC DuraLarch™ (EKF1), and AshinDura™ (PC1, QS, PQ). |
Profile Number/Series: | 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: | Bevelback, Rebated Bevel back, Rusticated, Splaycut or Multi-Splay. |
Cavity Fixing System: | None (Direct fix), or over drained cavity (18mm, 20mm, 40mm, 45mm). |
Surface finish: | Band Sawn Face (BSF), 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 and small pencil round is machined to seen edges of the profile for paint to adhere and ensure adequate micron build is achieved. |
Moisture content: | Refer to NZS 3602 Table 4. |
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) |
Moisture content: | ≤18% at fixing |
Alternative species: | Yellow Cedar, DuraLarch™ - limited profiles - refer Hermpac for confirmation. |
Grade: | Yellow Cedar (PC1), DuraLarch™ EKF1 – limited profiles |
Profile: | Select Standard (HP) and Custom (CP) Profiles from website or Hermpac Profile Portfolio or specified alternative custom profile (CP Profiles). |
Surface finish: | DF (Dressed Face), SF (Sanded Face - on the Broad Flat Face) |
Moisture content: | Refer to NZS 3602 Table 4. |
External corner: | HP40, HP42, HP201, HP202, HP310, HP321, Corner Soakers |
Internal corner: | HP41, HP110, HP201, HP202, HP360, HP370, CP2828 |
Species: |
|
Grade: | ~ |
Profile standard / custom: | ~ |
Surface finish: | Band Sawn Face (BSF) |
Species: | Western Red Cedar, Yellow Cedar, DuraLarch™ - (limited profiles - refer Hermpac for confirmation). |
Grade: | HERMPAC Premium Clears No.1 (PC1), Yellow Cedar (PC1), 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: | DF (Dressed Face), SF (Sanded Face - on the Broad Flat Face). |
Moisture content: | Refer to NZS 3602 Table 4. |
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.
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.
Nails: | Jolt Head |
Type: | Grade 316 stainless steel |
Size: | ~ |
Refer to Hermpac construction drawings for size and location of fixing.
Jolt head nails are not to be used when a stain/oil finish to weatherboards is specified. Delete if not required.
Nails: | Clinch nails |
Type: | Grade 316 stainless steel |
Size: | ~mm x 2.0mm |
Size: | 40mm, 50mm or 27mm. |
Refer to Hermpac construction drawings for size and location of fixing.
Recommended for all Rusticated and Multi-Splay installations. Mandatory for installations in Éxtra High’ wind zones and above.
Batten: | Radiata Pine |
Treatment: | ~ |
Batten size: | ~ |
Fixings: | Hot dipped galvanized nails |
Nail size: | ~ |
Batten: | Radiata Pine |
Treatment: | H3.1 or H3.2 |
Batten size: | 45 x 40mm or 40 x 45mm H3.2 square dressed batten |
Nail size: | 40mm x 2.5mm, 50mm x 2.8mm, 60mm x 2.8mm. |
Delete if using direct fixing method or structurally fixed battens.
Batten: | Radiata Pine |
Treatment: | H3.1 or H3.2 |
Batten size: | ~ |
Fixings: | Grade 304 Stainless steel Hex drive screws |
Fixing size: | ~ |
Options: |
|
Batten size: | 45 x 40mm or 40 x 45mm square dressed. |
Fixing size: | 12 gauge x 65mm long (for 45mm x 40mm battens), 12 gauge x 75mm long (for 40mm x 45mm battens). Ensure minimum embedment into studs is achieved. |
Delete if using direct fixing method or non structurally fixed options.
Product: | Cavibat non-structural cavity batten |
Material: | Extruded fluted polypropylene |
Size: | 40mm wide x 18mm thick |
Brand/type: | Sigma cavity closure |
Material: | Aluminium |
Options: | PVC or Stainless steel |
Delete if using direct fixing method.
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. |
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. |
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. |
Brand: | Machinecoat (NZ) Ltd |
|
Product: | Dulux |
|
Coating process: | Machinecoat (NZ) Ltd. Spray Application |
|
Primer: | HERMPAC White |
|
Undercoat: | HERMPAC Off White |
|
Top coat product and colour: | ~ |
|
Product: | Dulux, Resene |
Top coat colour: | ~ |
First top coat can be factory applied. Second and subsequent top coats (as required by paint manufacturer) are applied on site after installation. Delete or amend as required.
Brand: | Wood-X penetrating wood oil |
|
Colour: | ~ |
|
On site manual coats: | Refer Manufacturers specifications |
|
Option: | Woodsman Oil Stain. (Contact Hermpac for other options). |
Brand/type: | Refer to painting sections |
Can be factory applied, via Machinecoat NZ Ltd, check with Hermpac
Ensure the correct paint system is chosen for the timber specified.
Brand/type: | Refer to painting sections |
First finish/top coat can be factory applied, via Machinecoat NZ Ltd, check with Hermpac
Ensure the correct paint system is chosen for the timber specified.