Description

The Hermpac Accoya® Board and Batten Weatherboard Cavity System is an external vertically fixed wall cladding system for residential and light commercial type buildings where domestic construction techniques are used.

The Hermpac Accoya® Board and Batten Weatherboard Cavity System consists of vertically fixed weatherboards, ventilated cavity battens, flashings and accessories.

Scope

1. The Hermpac Accoya® Board and Batten Weatherboard Cavity System is certified for buildings:

• a. not greater than 10 metre height, and
• b. situated:
  • i. in all exposure zones (excluding microclimates) as defined in NZS3604:2011, Paragraph 4.2.4 NZS3604:2011, and
  • ii. more than 1m from a relevant boundary, and
• c. constructed with timber framing within the scope of NZBC Acceptable Solution E2/AS1, Third Edition including amendment 10 (5/11/2020) Paragraph 1.1, and with a risk score of 0-20, calculated in accordance with NZBC Acceptable Solution E2/AS1, Third Edition including amendment 10 (5/11/2020) Table 2, situated in Wind Zones (as defined in NZS 3604:2011)
  up to and including Extra High or
• d. constructed with timber framing subject to specific engineering design up to a maximum design differential ultimate limit state (ULS) wind pressure of 2.5 kPa and within the scope limitations of NZBC Acceptable Solution E2/AS1, Third Edition including amendment 10 (5/11/2020) Paragraph 1.1 with regards to building height and floor plan area, and with a risk score of 0-20 calculated in accordance with NZBC Acceptable Solution E2/AS1, Third Edition including amendment 10 (5/11/2020) Table 2

2. In Wind Zones (as defined in NZS 3604:2011) up to and including High,

• a. stud maximum spacing is 600mm centers.
• b. the Vertibat cavity battens must be installed horizontally at 400 to 600 mm centres. Where Vertibat cavity battens and nogs/dwangs are at greater than 480mm a job specific sign-off by Hermpac is required.

3. In Very High and Extra High Wind Zones (as defined in NZS 3604:2011) or for specific design where the differential wind pressures is above Extra High and up to 2.5 kPa,

• a. stud maximum spacing is 400mm centers.
• b. the Vertibat cavity battens must be installed horizontally at 400 to 480 mm centres.

4. Vertibat cavity battens 18 and 20mm are to be installed over nogs/dwangs, Vertibat cavity battens 40 and 45mm can be either installed over nogs/dwangs or be structurally fixed.

5. The Hermpac VertiLine Vertical Shiplap Weatherboard Cavity System shall be designed, used, installed and maintained in accordance with the Hermpac Accoya® Board and Batten Weatherboard Cavity System Installation Specifications, V3, July 2024 including including:

• a. the Hermpac standard construction drawings applicable (refer sections 9 & 11 of this certificate), and
• b. the fixing & finish requirements applicable to the oil/stain or paint system used.

6. The Hermpac Accoya® Board and Batten Weatherboard Cavity System must be only installed vertically on vertical, flat surfaces.

7. Only stainless steel fixings can be used with The Hermpac Accoya® Board and Batten Weatherboards.

8. Only aluminium window and door joinery meeting the requirements of NZS 4211:2008 (including Amendment1) for the relevant Wind Zone or wind pressure and installed with vertical jambs and horizontal heads and sills shall be used with The Hermpac Accoya® Board and Batten Weatherboard Cavity System.

9. The designer shall provide a signed Declaration for submission with the building consent application that the use of this product in the proposed building work falls within the scope of this certificate and that all design conditions of this certificate have been met.

10. The installer shall supply a signed Product Installation Checklist – Hermpac Accoya® Board and Batten Weatherboard Cavity System_Checklist (Version 2, August 2023) for consideration for issuing a Code Compliance Certificate (CCC).