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Weathertex Selflok Weatherboards
Description

The Weathertex Selflok Weatherboard Cladding System is manufactured from 97% natural hardwood timber. The system consists of horizontal Selflok, flashings and accessories, and is applied over a drained and vented cavity, or directly fixed to external wall framing. 

Selflok Weatherboards are available in a variety of profiles and finishes to suit different architectural styles. Weatherboards are all 3660 x 298mm, and may be Natural or in a range of pre-primed textures including Ruff Sawn, Woodsman, and Smooth.

Key Features
  • Available in a range of profiles and finishes to suit architectural styles
  • Natural finish or pre-primed
  • BRANZ appraised for both cavity and direct-fix installations
  • 25 year warranty on pre-primed weatherboards and 15 year warranty for Natural finish
  • Made from 97% natural hardwood timber, free from silica, resins, and formaldehyde
  • PEFC certified and made from waste timber meaning no old growth hardwood is ever used
  • Better than zero carbon footprint
  • Lightweight (9.8kg per m²) and easy to handle for efficient installation
  • Off stud joining option enables minimal waste and less timber stud layout
Scope of Use

Direct Fix

The Weathertex Direct Fixed Selflok Panel Cladding System has been appraised as an external horizontally fixed wall cladding system to timber-framed buildings within the following scope: 

  • the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1; and,
  • with a risk score of 0-6, calculated in accordance with NZBC Acceptable Solution E2/AS1, Table 2; and,
  • situated in NZS 3604 Wind Zones up to, and including, Very High.


Cavity Fix — Timber Framing

The Weathertex Cavity Fixed Selflok Panel Cladding System has been appraised as an external horizontally fixed wall cladding for timber-framed buildings within the following scope:

  • the scope limitations of NZBC Acceptable Solution E2/AS1, Paragraph 1.1 for timber-framed buildings; and,
  • with a risk score of 0-20, calculated in accordance with NZBC Acceptable Solution E2/AS1, Table 2; and,
  • situated in NZS 3604 Wind Zones up to, and including, Extra High.


Cavity Fix — Steel Framing:

The Weathertex Cavity Fixed Selflok Panel Cladding System has also been appraised as external horizontally fixed wall claddings for steel-framed buildings within the following scope:

  • the scope limitations of NASH Building Envelope Solutions Paragraph 1.1 for steel-framed buildings; and,
  • with a risk score of 0-20, calculated in accordance with NASH Building Envelope Solutions; and,
  • situated in NASH Standard Part 2 Wind Zones up to, and including, Extra High.

See BRANZ Appraisals 511 and 512 for full information.

Limitations on Use
  • Must only be installed horizontally on vertical surfaces
  • Design details must follow the Weathertex design and installation documents
  • Must be installed by a Licensed Building Practitioner (LBP)
  • Appraised for use with aluminium window and door joinery that is installed with vertical jambs and horizontal heads and sills
  • Joinery must meet the requirements of NZS 4211 for the relevant Wind Zone.
Statement of Building Code Compliance

In the opinion of BRANZ, Weathertex Selflok Panel Cladding Systems, if designed, used, installed and maintained in accordance with the statements and conditions of BRANZ Appraisal 511 and 512, will meet the following provisions of the NZBC:

  • Clause B1 STRUCTURE: Performance B1.3.1, B1.3.2 and B1.3.4. Meets the requirement for loads arising from self-weight, earthquake, wind, impact and creep [i.e. B1.3.3 (a), (f), (h), (j) and (q)]. 
  • Clause B2 DURABILITY: Performance B2.3.1 (b) 15 years, B2.3.1 (c) 5 years and B2.3.2. 
  • Clause E2 EXTERNAL MOISTURE: Performance E2.3.2. 
  • Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. 

See BRANZ Appraisals 511 and 512 for full information.

In-Service History

Weathertex has been used in residential and commercial projects in New Zealand since 1980 and in Australia since 1930.

Other Performance Attributes
  • Better than zero carbon footprint
  • PEFC-certified timber for sustainable sourcing
  • Green Tag Certified
  • No added silica, resins, or formaldehyde
  • Resistant to termites, rot, and fungal decay

Warranty

  • 25 year guarantee — pre-primed
  • 15 year guarantee — Natural
BRANZ Appraised
BRANZ Appraised
Green Tag Certified
Green Tag Certified
PEFC Certified
PEFC Certified
Documents
BPIR Product Statement: Weathertex Selflok

2025

BRANZ Appraisal 511 Weathertex — Direct Fix

No 511 [2020]

BRANZ Appraisal 512 Weathertex — Cavity Fix

No 512 [2020]

NZBC Fire Regulations and Acceptable Solutions
Installation Manual: Weathertex

2023

Weathertex Warranty

2019

Weathertex Product Catalogue

2022

Weathertex Case Studies
Weathertex Resources
Installation Details
Construction Details: Selflok — Cavity Fix

2022

Construction Details: Selflok — Direct Fix

2022

ITI NZ is a leading timber supplier in New Zealand, offering sustainable, innovative solutions for residential, commercial, and community projects.

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