Technical Statement
Product Description
Accoya & Accoya Grey has a Branz Appraisal and CodeMark Certificate for all the timber weatherboard cladding systems over 18/20 and 40/45mm cavity, available to meet NZBC Compliance.
Accoya & Accoya Grey has proven excellent performance, finish and sustainability,
giving architects and designers new design freedom for timber cladding.
Features:
- Available in profiles ranging from narrow to very wide (ex. 300mm), without having to increase thickness
- Maintains original form and shape with limited movement when compared with all other timbers
- Dressing, bandsawing, charring and brushing board face options.
- No LRV (light reflective value) restrictions
- Sustainable sourced with full CoC and FSC certification
- No coating or re-coating required over serviceable life for durability purposes
- Accoya Grey / after processing, this naturally dyed timber - from surface to core, provides a grey weathered finish from Day 1 without compromising the natural grain characteristics of the timber
- Class 1 Durable (40+ years above ground)
Full specifications available via Masterspec - 4211HA and 4211HB for Accoya® or refer 4221HV and 4221HH for Western Red, Yellow Cedar, DuraLarch or AshinDura.
Scope of use
If used, designed, installed and maintained in accordance with the statements and conditions of the relevant Codemark Certificate, BRANZ Appraisal and Hermpac Technical Literature, will meet the following provisions of the NZBC:
Clause B1 Structure (B1.3.1, B1.3.2 and B1.3.4)
Clause B2 Durability (B2.3.1 (b) 15 years and B2.3.2)
Clause E2 External Moisture (E2.3.2)
Clause F2 Hazardous Building Materials (F2.3.1)
The Hermpac Accoya & Accoya Grey Timber Weatherboard Cavity Systems are an Alternative Solution in terms of NZBC compliance.
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(a), B1.3.3(h), B1.3.3(j), B1.3.3(q), B1.3.4
Refer relevant system Codemark Certificate & Branz Appraisal
- Clause B2 Durability: Performance B2.3.1(b), B2.3.2
Accoya & Accoya Grey timber meets a Class 1 Durability rating, which well exceeds the NZBC B2 Durability requirement.
- Clause E2 External moisture: Performance E2.3.2
Refer relevant system Codemark Certificate & Branz Appraisal
- Clause F2 Hazardous building materials: Performance F2.3.1
Refer relevant system Codemark & Branz Appraisal
Notes
Accoya & Accoya Grey well exceed the required minimum durability requirement as set by NZBC, B2.
Supporting evidence
The product has and can make available the following additional evidence to support the above statements:
Use in Service History
Accoya Timber has been used in New Zealand for well over 15 years now and world-wide for much longer.
Product Criteria
Design requirements
The Hermpac Accoya & Accoya Grey weatherboard cladding cavity systems are suitable as an external fixed wall cladding:
- the scope limitations of NZBC AS E2/AS1, Paragraph 1.1; and,
- constructed with timber framing complying with NZBC; and,
- with a risk score of 0-20 calculated in accordance with NZBC AS E2/AS1 nad
- situated in NZS3604 Wind Zones up to, and including 'Extra High'
For weathertightness and structural wind loading for buildings using Hermpac Accoya & Accoya Grey weatherboard cladding cavity systems:
- the scope limitations of NZBC AS E2/AS1, Paragraph 1.1 with regards to building height and floor plan area; and,
- constructed with timber framing complying with the NZBC; and,
- situated in specific design wind pressures up to a maximum design differential ultimate limit state (ULS) of 2.5kPa
Installation requirements
Refer appropriate system literature provided:
- Hermpac Accoya Installation Specification - cavity fix
- Hermpac Accoya Construction Drawings - 18/20 or 40/45mm
- Hermpac Accoya Product Installation Checklist
+ appropriate Branz Appraisal and Codemark Certificate
Maintenance requirements
No coating or recoating required for NZBC B2: Durability but coating of Accoya is recommended/required if a particular desired look is required. Specified coating will need to be re-applied to maintain that look over the timber claddings serviceable life.
Warrantees
As per Hermpac literature.
Environmental
FSC certified
Declare Label
Red List Free
Full Chain of Custody
Relationships
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New Zealand Made |
Building Product Information Requirements
Manufacturer
Legal Trading Name:
Hermpac
Business Email:
technical@hermpac.co.nz
Contact Number/s:
09 4219840
Product Identifier
CLASS 2
Warnings
This product has no warnings associated with it.
