Description

Certificate holder: J.Scott and Company Limited t/a JSC.

The JSC VertiClad Cladding System is an external wall cladding installed over a 20 mm or 45 mm ventilated cavity.

The JSC VertiClad Cladding System (the System) comprises: vertically fixed weatherboards installed over H3.2 treated timber castellated cavity battens to form either a 20 mm cavity or a 45 mm cavity, fascia boards and moulding profiles.

JSC VertiClad Cladding System weatherboards are manufactured from the following materials:

• Western Red Cedar (Thuja Plicata)
• Alaskan Yellow Cedar (Cupressus nootkatensis)
• Radiata Pine – H3.2 (MicroPro® treated)
• Nordic Pine – H3.2 (MicroPro® treated)
• TMT Amba
• TMT Taiga RW
• TMT Taiga WW
• TMT Taxon
• TMT Tuscan
• TMT ThermoPine
• TMT ThermoPine H3.2 MicroPro® treated.

Scope

1. The system is certified for timber-framed buildings:

• a. with walls designed in accordance with NZS3604:2011 Timber-framed buildings, as modified by Acceptable Solution B1/AS1 and within the scope of Acceptable Solution E2/AS1, Subsection 1.1.1, or of at least equivalent stiffness to the framing provisions of NZS3604:2011, and situated in Wind Zones (as defined in NZS 3604:2011) up to and including Extra High; or
• b. subject to specific engineering design in accordance with Verification Method B1/VM1 up to a maximum design differential ultimate limit state (ULS) wind pressure of 2.5 kPa, and
• c. up to 10 m in height, and 
• d. with a risk score of 0-20, calculated in accordance with NZBC Acceptable Solution E2/AS1 Tables 3.1.2.1 and 3.1.3.1, and
• e. situated:
  • i. in all exposure zones (excluding microclimates) as defined in NZS3604:2011, Paragraph 4.2.4, and
  • ii. more than 1m from a relevant boundary.

2. The System shall be designed, used, installed and maintained in accordance the following sets of documents collectively referenced as the Applicable Technical Specification:

• a. Design Guide - JSC Verticlad, Vertical Shiplap Weatherboard Cladding, Version 1.1, February 2026
• b. Installation Guide - JSC Verticlad, Vertical Shiplap Weatherboard Cladding, Version 3.7, February 2026
• c. JSC Verticlad System Shiplap Installation Checklist, v1.5, February 2026
• d. Technical Drawings - JSC Verticlad – Vertical Shiplap Weatherboards - Flexible Underlay 20 mm Cavity Fix, Version 2.6, 11/02/2026
• e. Technical Drawings - JSC Verticlad – Vertical Shiplap Weatherboards - Rigid Underlay 20 mm Cavity Fix, Version 2.6, 11/02/2026
• f. Technical Drawings - JSC Verticlad – Vertical Shiplap Weatherboards - Flexible Underlay 45 mm Cavity Fix, Version 2.6, 11/02/2026
• g. Technical Drawings - JSC Verticlad – Vertical Shiplap Weatherboards - Rigid Underlay 45 mm Cavity Fix, Version 2.6, 11/02/2026
• h. JSC Exterior Timber Weatherboard Cladding, Maintenance Guide, Version 3.3, February 2026.

3. The System shall:

• a. be fixed over a ventilated cavity in conjunction with a flexible building underlay or rigid air barrier in accordance with the Applicable Technical Specification, and
• b. be installed vertically on vertical, flat surfaces, and
• c. use the components and board profiles as described in the Applicable Technical Specification (where these components are substituted with alternative products, these applications fall outside the scope of this certification), and
• d. incorporate joinery that meets the requirements of Section 4.4 of the Building Products Specifications for the relevant Wind Zone or wind pressure.

4. Stainless steel or silicon bronze fixings shall be used with TMT Amba, TMT Taiga RW, TMT Taiga WW, TMT Taxon, TMT Tuscan, TMT ThermoPine and TMT ThermoPine H3.2 MicroPro® treated.

5. 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 intended used of the system as described in this certificate and that all design conditions of this certificate have been met.

6. The installer shall supply a signed Declaration that the product has been installed in accordance with the installation conditions of this certificate, for consideration for issuing a Code Compliance Certificate (CCC).