4221CH CEDARSCREEN HORIZONTAL ROSENFELD KIDSON
WEATHERBOARD CLADDING
1.
GENERAL
This section relates to the supply and fixing of Rosenfeld Kidson & Co. Ltd Cedarscreen
horizontal weatherboard cladding.
It includes;
- Rusticated weatherboards
- Bevel Back weatherboards
- Cavity batten systems
- Fascia
- Exterior mouldings
- Exterior corrosive resistant soakers
- Proprietary flashings
- Proprietary factory oiling system
- Proprietary plug nail fixings
1.1
RELATED WORK
Refer to 4161 UNDERLAYS, FOIL AND DPC for building underlays.
Refer to 6734D Dryden WoodOil for transparent finish or painting sections for finishes to
weatherboard cladding.
Documents
1.2
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
AS/NZS 4284
Testing of building facades
BRANZ BU 411
Timber weatherboard profiles
BRANZ BU 475
Structurally fixed cavity battens
1.3
MANUFACTURER/SUPPLIER DOCUMENTS
Manufacturer’s and supplier’s documents relating to this part of the work:
QA check sheet (Quality assurance check sheet)
For Cedarscreen Rusticated weatherboards:
Rosenfeld Kidson Cedarscreen Rusticated Installation Guide
Les Boulton & Associates Report 121030: Durability Appraisal of Rusticated Cedarscreen
Cladding System
Rosenfeld Kidson Rusticated technical drawings
Rosenfeld Kidson Factory Oil Maintenance Guide
For Cedarscreen Bevel Back weatherboards:
Rosenfeld Kidson Cedarscreen Bevel Back Installation Guide
Les Boulton & Associates Report 121026: Durability Appraisal of Bevel Back
Cedarscreen Cladding System
Rosenfeld Kidson Bevel Back technical drawings
Rosenfeld Kidson Factory Oil Maintenance Guide
Manufacturer/supplier contact details
Company:
Rosenfeld Kidson & Co. Ltd
Web:
www.rosenfeldkidson.co.nz
Email:
specifications@rosenfeldkidson.co.nz
Telephone:
09 573 0503
Mobile:
027 555 2111
© CIL Masterspec 2013 DEC4221CH CEDARSCREEN HORIZONTAL ROSENFELD KIDSON WEATHERBOARD CLADDING Page 1
Performance
1.4
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. Refer to
Rosenfeld Kidson for fixing details and technical specification.
Refer to Structural CS-H proprietary horizontal cavity batten PS1 for design and use of
fixings for appropriate wind zones, site and building height.
1.5
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 and NZS 4284 Testing of Building Facades.
Requirements
1.6
1.7
SAMPLES AND PROFILE DRAWINGS
Samples as listed to be provided to the designer prior to the commencement of the
contract. Refer to www.rosenfeldkidson.co.nz for sample request form..
Product Profile:
Product Finish:
Colour:
~
~
~
Number samples
required:
~
MAINTENANCE INSTRUCTIONS
Provide two copies of all relevant Dryden WoodOil maintenance information on
completion of the work. Refer to www.rosenfeldkidson.co.nz or www.dryden.co.nz.
NOTE: Re-apply Dryden WoodOil up to two years after second coat, to the areas where
the surface exhibits signs of losing capability to 'bead water' or colour tone is faded
principally on northern exposed faces. This coat may be extended in areas that
experience better quality environmental conditions, such as shading, e.g. soffits. Do not
exceed a 36 month period between additional maintenance coats. Timber facades
require annual cleaning; this should be carried out in conjunction with Dryden
maintenance guidelines.
2.
PRODUCTS
Materials
2.1
TIMBER SPECIES
Western Red Cedar (Thuja Pilcata), harvested from well managed forests of British
Columbia, Canada. It carries certification under one or more of the independent third
party certification systems (PEFC, CSA, SFI or FSC).
2.2
WEATHERBOARDS
Western Red Cedar weatherboards to Rosenfeld Kidson profiles as detailed. General
design to NZS 3617 and or BRANZ BU 411, species and grading to NZS 3602, table 2,
reference 2A.1, Requirements for wood-based building components to achieve a 15year 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.
2.3
MOULDINGS
Western Red Cedar mouldings to Rosenfeld Kidson 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. Mouldings 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.
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2.4
FASCIA BOARDS
Western Red Cedar fascia to Rosenfeld Kidson 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. Fascia 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.
2.5
WALL UNDERLAYS
Breather type, waterproof fixed to NZBC E2/AS1, clause 9.1.7.1, table 23, Properties of
roof underlays and wall underlays, to NZBC E2/AS1, 9.1.5, Wall underlays to wall
openings, NZBC E2/AS1, 9.1.6, Air seals and NZBC E2/AS1, 9.1.7, Wall underlay.
Refer to section 4161 UNDERLAYS, FOIL AND DPC for type and fixing details.
2.6
RIGID AIR BARRIER
Rigid wall underlay fixed to NZBC E2/AS1, clause 9.1.7.2, a minimum 6mm fibre cement
sheet or 7mm H3.2 plywood to NZBC E2/AS1, table 23, Properties of roof underlays
and wall underlays, to NZBC E2/AS1, 9.1.5, Wall underlays to wall openings, NZBC
E2/AS1, 9.1.6, Air seals and NZBC E2/AS1, 9.1.7, Wall underlay. Refer to section
4161 UNDERLAYS, FOIL AND DPC for type and fixing details.
2.7
EXTERIOR CAVITY WALL BATTENS
To NZBC E2/AS1, clause 9.1.8, Drained cavities. Radiata Pine H3.1 battens, nominal
20mm x 45mm minimum wide, timber to comply with B2/AS1. Be fixed by the cladding
fixings to the wall framing. To NZS 3602, table 1, reference 1D.10, Requirements for
wood-based building components to achieve a 15-year durability performance.
2.8
EXTERIOR CAVITY CLOSER/VERMIN-PROOFING
To be provided above window heads and at the base of the drained cavity. Powder
coated aluminium, stainless steel or PVC with the length and width to suit cavity. To
NZBC E2/AS1, 9.1.8.3 and figure 66.
Components
2.9
ROSENFELD KIDSON PLUG NAILS, SILICON BRONZE
Fixings to NZBC E2/AS1 Table 24. Refer to Rosenfeld Kidson construction details for
fixing details and to SELECTIONS for fixing sizes.
2.10
ROSENFELD KIDSON PLUG NAILS, STAINLESS STEEL
Fixings to NZBC E2/AS1 Table 24. Refer to Rosenfeld Kidson construction details for
fixing details and to SELECTIONS for fixing sizes.
2.11
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, cladding materials and fixings. Refer:
Les Boulton & Associates Reports for durability and compatibility of materials
2.12
SOAKERS, STAINLESS STEEL
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, cladding materials and fixings. Refer: Les Boulton & Associates Reports for
durability and compatibility of materials.
2.13
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, cladding
© CIL Masterspec 2013 DEC4221CH CEDARSCREEN HORIZONTAL ROSENFELD KIDSON WEATHERBOARD CLADDING Page 3
materials and fixings. Refer: Les Boulton & Associates Reports for durability and
compatibility of materials.
Finishes
2.14
FACTORY FINISH
Factory applied application of Dryden WoodOil on all faces of the weatherboards prior to
installation.
NOTE: Dressed faced profiles are to be face sanded prior to factory oiling.
2.15
SITE FINISH
Use Dryden WoodOil for sealing cut or exposed edges on site and for applying the
finishing coat. Site applications to manufacturer's specifications. Refer to SELECTIONS.
3.
EXECUTION
Conditions
3.1
GENERALLY
Execution to NZBC E2/AS1: 3.0 Weathertightness risk factors, 9.0 Wall claddings,
9.1.7 Wall underlays, 9.1.8 Drained cavities and 9.4 Timber weatherboards.
3.2
STORAGE
Take delivery of Rosenfeld Kidson timber products, dry, unmarked and undamaged from
freight and handling (grade characteristics excluded). Store on site, laid flat and true
under cover in a cool and dry place, free from sub trade contamination and elevated on
bearers approx. 100mm from the ground.
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, governing support for timber
board cladding.
Application - preparation
3.4
FACTORY OIL COATING - OILED TIMBER
Dryden WoodOil spray factory applied on all faces of Rosenfeld Kidson weatherboard
profiles. Ensure a pre-order of Dryden WoodOil has been ordered for sealing cut or
exposed edges.
3.5
SITE PRIMING OR SEALING - PAINT FINISH
Ensure all primers and undercoat products used are compatible with the surface or
finishing paint being used. This is essential to ensure warranty requirements are met.
If not pre-finished before delivery, prepare and coat all faces and edges with one coat of
premium oil based primer and one coat of premium oil based undercoat, to coating
manufacturer's specifications, immediately following the opening of the block stacked
packet. Open stack each board to dry with the back facing down, ensuring the face
remains 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 section/s. Allow to re-coat if exposed for more than one month before
the final coating is applied.
3.6
FIX UNDERLAYS
Refer to section 4161 UNDERLAYS, FOIL AND DPC for type and fixing details. Comply
with E2/AS1, Table 23, Properties of roof underlays and wall underlays and NZBC
E2/AS1clause 9.1.7.1 and 9.1.7.2 E2/AS1.
3.7
FIX RIGID AIR BARRIER
Fix Rigid Air Barrier to Manufacturer's specifications.
Application - over cavity battens
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3.8
DRAINED CAVITY - NON STRUCTURAL
Install 20mm minimum thickness drained cavity to NZBC E2/AS1: 9.0 Wall claddings,
where required. The battens are fixed by the cladding fixings which then penetrate the
wall framing studs over the wall underlay. Seal the top of the cavity and install cavity
closer/vermin-proofing at base of walls, open horizontal (or raking) junctions, over
openings (windows, doors and meters etc). Do not use horizontal cavity battens. Use
cavity spacers where fixing is required between cavity battens.
3.9
DRAINED CAVITY - STRUCTURAL
Install 45mm minimum thickness drained cavity to NZBC E2/AS1: 9.0 Wall claddings,
where required. Structurally fix Radiata Pine MCQ H3.2 cavity battens to wall framing
studs to BRANZ BU 475, 4.3.1, and 4.3.2. Seal the top of the cavity and install cavity
closer/vermin-proofing at base of walls, open horizontal (or raking) junctions, over
openings (windows, doors and meters etc). Do not use horizontal cavity battens. Use
cavity spacers where fixing is required between cavity battens.
Application - fixing nails
3.10
FIXING - OILED / STAINED TIMBER FINISH
Install level, true to line and face, to NZBC E2/AS1: 9.4 Timber weatherboards. Coat all
cut ends with Dryden WoodOil. 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 Rosenfeld
Kidson pentagon head plug 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.
Refer to E2/AS1, Table 24, Fixing selection for wall claddings, for dimensions and
fixing details.
3.11
FIXING – PAINT FINISH
Install level, true to line and face, to NZBC E2/AS1: 9.4 Timber weatherboards.
Dressed faced profiles to have a micron radius to outer edges and be pre-sanded prior to
undercoating and priming. Coat all cut ends before fixing with the correct undercoat and
primer. 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 Rosenfeld Kidson jolt head nails
2mm below the surface and undercoat and prime prior to filling and sanding. Finish flush
with the surface and punch 2mm below the surface with a hole punch.
NOTE: All undercoat, primers, fillers and surface paints to be as specified.
Refer to E2/AS1, Table 24, Fixing selection for wall claddings, for dimensions and
fixing details.
Application - weatherboards
3.12
FIXING RUSTICATED WEATHERBOARDS
Ensure Cedarscreen Rusticated weatherboards are installed by a registered LBP
(Licensed Building Practitioner). Cedarscreen QA documents to be completed and
signed by the LBP prior to completion.
Install level, true to line and face, to NZBC E2/AS1: 9.4 Timber weatherboards. Start
the fixing process from the bottom plate. Set out a story rod and account for key
measurements between the bottom plate, window sill, head and top plate. This will help
set out and position the weatherboards accurately at wall junctions and openings.
Weatherboards to be lapped 25mm aligning weathergrooves. Provide a 2mm expansion
gap between successive boards. Weatherboard horizontal joints may vary in width; use
packers to achieve the required spacing between lapped boards. Pilot drill all fixings
slightly smaller than gauge of fixing to ensure a snug fit and to minimise risk of moisture
entry. Single nail weatherboards to each fixing point just clear of the lap. Ensure care is
taken not to overdrive the nail and damage or expose surface fibres. Stagger scarf end
joints randomly on adjacent boards. Fit cover boards and rustic plug to all openings.
© CIL Masterspec 2013 DEC4221CH CEDARSCREEN HORIZONTAL ROSENFELD KIDSON WEATHERBOARD CLADDING Page 5
Ensure external corners are weatherproofed with a corrosion resistant back flashing. Use
external Western Red Cedar RK 42 or RK 40 corner moulds or use cover boards to form
external box corners.
Ensure internal corners are weatherproofed with corrosion resistant back flashings. Use
internal Western Red Cedar RK 41 corner mould option.
Refer to Rosenfeld Kidson website: www.rosenfeldkidson.co.nz for technical details.
3.13
FIXING BEVEL BACK WEATHERBOARDS
Ensure Cedarscreen Bevel Back weatherboards are installed by a registered LBP
(Licensed Building Practitioner). Cedarscreen QA documents to be completed and
signed by the LBP prior to completion.
Install level, true to line and face, to NZBC E2/AS1: 9.4 Timber weatherboards. Start
the fixing process from the bottom plate. Set out a story rod and account for key
measurements between the bottom, window sill, head and top plate. This will aid set out
and position the weatherboards accurately at wall junctions and openings.
Weatherboards to be lapped 32mm aligning weather grooves. For rebated bevel back
boards provide a 2mm expansion gap between successive boards. Pilot drill all fixings
slightly smaller than gauge of fixing to ensure a snug fit and to minimise risk of moisture
entry. Single nail weatherboards to each fixing point just clear of the lap. Ensure care is
taken not to overdrive the nail and damage or expose surface fibres.
Butt end or scarf joints, mitre external corners and notch and scribe internal corners.
Orientate scarf joints to face away from prevailing winds and weather. Back flash internal
and external corners. Fit soakers to butt end joints, scarf joints and external corners.
Stagger butt end joints randomly or scarf joints across adjacent boards.
Refer to Rosenfeld Kidson website www.rosenfeldkidson.co.nz for technical details.
Application - Ancillary
3.14
WINDOW FIXING DIRECT AND CAVITY
Fix to Rosenfeld Kidson fixing detail.
3.15
ALUMINIUM WINDOWS
To comply with NZBC 4211.
3.16
INSTALL FLASHINGS
Install flashings, covers and soakers as detailed on the drawings and to NZBC E2/AS1.
Refer to Rosenfeld Kidson fixing details and technical specification. Material compatibility
to NZBC E2/AS1 table 21.
3.17
INSTALL SCRIBERS
Ensure RK 12 scribers are nailed, wet sealed in place and fixed in accordance with
Rosenfeld Kidson fixing details.
3.18
COMPLETE
Ensure the work is complete with all flashings, finishings and trim properly installed to
ensure the cladding system is completely weathertight. In addition ensure all associated
QA check sheets have been signed off by the main contractor.
Completion
3.19
REPLACE
Replace all damaged or marked elements.
3.20
LEAVE
Leave work to the standard required for following procedures.
3.21
REMOVE
Remove all debris, unused materials and elements from the site.
© CIL Masterspec 2013 DEC4221CH CEDARSCREEN HORIZONTAL ROSENFELD KIDSON WEATHERBOARD CLADDING Page 6
4.
SELECTIONS
4.1
RUSTICATED WEATHERBOARDS
Species:
Rosenfeld Kidson Western Red Cedar
Grade:
PC1
Cedarscreen Rusticated
System:
Profile type/number:
RK 67
Finished dimensions:
140mm x 18.5mm
Surface finish:
BSF
Moisture content:
16 -18% at fixing
Fixing system:
Cedarscreen Rusticated
External corner battens:
RK 42 and RK 40 corner mould
Internal corner battens:
RK 41, 19mm X 19mm internal moulding
4.2
BEVEL BACK WEATHERBOARDS
Species:
Rosenfeld Kidson Western Red Cedar
Grade:
~
Cedarscreen Bevel Back
System:
Profile type/number:
RK 62
Finished dimensions:
180mm x 18.5mm
Surface finish:
BSF
Moisture content:
16 -18% at fixing
Fixing system:
Cedarscreen Bevel Back
External corner battens:
RK 91 and RK 92 cover batten with RK 12 scriber.
Internal corner battens:
RK 110, 39mm x 39mm batten
4.3
ASSOCIATED MOULDINGS
Species:
Grade:
Cover board dimensions:
Eaves mould:
Cornice:
Scriber:
Surface finish:
Moisture content:
Rosenfeld Kidson Western Red Cedar
~
~
RK 32 40mm x 27mm
RK 7, 30mm x 18mm x 10mm
RK 12, 40mm x 17mm and RK 13 40mm x 10mm
Band Sawn Face (BSF)
16 -18% at fixing
FASCIA
Species:
Grade:
Profile:
Surface finish:
Rosenfeld Kidson Western Red Cedar
~
~
Band Sawn Face (BSF)
4.4
4.5
FASTENINGS - RUSTICATED
Nails:
~
Size:
~
4.6
FASTENINGS - BEVEL BACK RK PLUG NAILS
Nails:
~
Size:
~
4.7
WALL UNDERLAY
Brand/weight:
Refer to 4161 UNDERLAYS, FOIL AND DPC
4.8
RIGID AIR BARRIER
Brand/weight:
Refer to 4161 UNDERLAYS, FOIL AND DPC
4.9
CAVITY BATTENS
Timber species:
Timber grade:
Treatment:
Size:
Radiata pine
Merchant or better
H3.1
20mm x 45mm
© CIL Masterspec 2013 DEC4221CH CEDARSCREEN HORIZONTAL ROSENFELD KIDSON WEATHERBOARD CLADDING Page 7
4.10
CAVITY CLOSER / VERMIN-PROOFING
Brand/type:
Vermin closure to E2/AS1 9.1.8.3 Vermin -proofing
Material:
Rosenfeld Kidson cavity closure, aluminium powder coated finish
4.11
INTERNAL AND EXTERNAL CORNER BACK FLASHINGS
Material:
Rosenfeld Kidson flashings, aluminium powder coated finish
Size:
~
4.12
CORNER AND JOINT SOAKERS
Location:
External corners / board ends
Material:
~
Finish:
~
4.13
FACTORY FINISH COAT - COLOUR TONED OIL
Type:
Rosenfeld Kidson Factory Oil
Coating process:
Factory applied
On-site manual coats:
Dryden WoodOil™
4.14
SITE COATING - OIL STAIN
Brand:
Number of onsite coats:
Execution:
Dryden WoodOil™
1 additional coat of Dryden WoodOil 6 – 12 weeks after
the initial factory coat
Use a PAL Speedbrush (Commercial size) for an even
distribution apply WoodOil™ at the manufacturer's
recommended coverage rates, note this will vary
between (BSF) and (DFS)
© CIL Masterspec 2013 DEC4221CH CEDARSCREEN HORIZONTAL ROSENFELD KIDSON WEATHERBOARD CLADDING Page 8