Technical Statement
Scope of use
Cedarscreen Vertical 20mm non-structural and 45mm structural systems have been tested as externally fixed vertical wall cladding systems to comply with and is limited to the following:
• NZBC Acceptable Solution (E2/AS1/VM1, Paragraph 1.1)
• Testing included Amendment 5 of E2/AS1, including Extra High
• Specific wind pressure up to a maximum ultimate limit state (ULS) 2.5 kPa (2500 Pa)
• Risk score of 0-20 (E2/AS1 tables 1, 2 and 3)
• Timber framing to comply with NZBC NZS 3604
• NZS 3604 Wind Zones
• Material, products and processes contained within the building scope of NZS 3604
• Tested for use with aluminium windows and door joinery to comply with NZS 4211
New Zealand Building Code (NZBC)
The product will, if employed in accordance with the supplier's installation and maintenance requirements, assist with meeting the following provisions of the building code:
- Clause B1 Structure: Performance B1.3.1, B1.3.2, B1.3.3, B1.3.3(a), B1.3.3(h), B1.3.3(j), B1.3.3(q), B1.3.4, B1.3.4(a), B1.3.4(b), B1.3.4(c), B1.3.4(d), B1.3.4(e)
- Clause B2 Durability: Performance B2.3.1(b), B2.3.2, B2.3.2(a), B2.3.2(b)
- Clause E2 External moisture: Performance E2.3.2
- Clause F2 Hazardous building materials: Performance F2.3.1
Notes
B2 Durability E2 External moisture
The RK Cedarscreen 45mm cavity batten is a structural batten which is therefore required to have a minimum 50 year durability requirement. The batten is engineered from a specific grade of radiata pine and profiled to span minimum 600mm and independently tested to do so. It must also be treated to H3.2 with MCQ treatment to provide necessary durability and compatibility requirements. It must also be structurally fixed with 90x3.30mm stainless steel fixings.
All cladding has a 15 year durability requirement and is required to have regular maintenance over that period, as per the Factoryoil Maintenance guidelines.
Supporting evidence
The product has and can make available the following additional evidence to support the above statements:
Product Criteria
Design requirements
Vertical Western Red Cedar cladding is fixed either through the 20x45mm cavity batten to dwangs; or directly to the structural 45x45mm cavity batten only, at a maximum 400mm centres.
CS-H 20x45mm cavity battens are to be fixed horizontally to dwangs at maximum 400mm centres with studs spacing between 400mm or to a maximum 600mm centres. CS-H 20x45mm cavity battens are fixed, by the cladding fixings, to the wall framing.
CS-H structural 45x45mm horizontal cavity batten. 15 degree slope to the top of the cavity batten. 6x6mm drip edge to the lower face of the cavity batten. Castellation dimensions are 25x6mm, internal corners are radiused to strengthen the section. CS-H 45x45mm structural cavity battens are fixed directly to the framing structurally at between 400mm centres or a maximum 600mm centres. Cavity battens are fixed with 1x 90x3.15 Stainless steel nails at each fixing point. CS-H structural 45x45mm cavity battens are fixed horizontally at 400mm centres max.
Installation requirements
Please refer to installation guidelines and QA checksheet for the following:
1.0 Framing Checks 2.0 Flashing Checks 3.0 Select Underlays Checks 4.0 Install Cavity Battens Checks 5.0 Penetrations Checks 6.0 Profi le Type, Grade and Finish 7.0 Factory Oil Checks 8.0 Flashing Installation Checks 9.0 Install Cedarscreen Vertical Weatherboards Checks
Maintenance requirements
Maintenance shall be carried out as necessary to achieve the required durability of materials, components and junctions.
Annual inspection of the cladding material must be made to ensure that all aspects of the cladding system, including flashings and joints remain weatherproof. Any damaged areas or areas showing signs of deterioration, which could allow water ingress must be repaired immediately.
Regular cleaning (at least annually) of the stain or WoodOil coating is required to remove dirt or grime and fungal growth. Dirt and grime may be removed with the use of a soft brush, warm water and a light detergent cleaner.
Recoating with either a stain or WoodOil will be required throughout the life of the cladding system. Check manufacturers product specific recoating requirements.
Recoating must be carried out approximately every 2-3 years in accordance with the manufacturers instruction.
Environmental
Western Red Cedar is also favoured by conservationists as the forests of British Columbia, from where our cedar is sourced, are well-managed and certified as such. All our producers carry certification under SFI, CSA, FSC or PEFC. Please refer to the following site for more information regarding this: www.wrcea.org/environment-sustainability/intro.htm.
Relationships
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PEFC
SGS-PEFC/COC-0993 |
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FSC
SGS-COC-006703 |
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CodeMark by CertMark
CMA-CM40127/40130 |
