Certclad Weatherboards


CertClad is the ITI Timspec brand name representing certified cavity-based weatherboard cladding system. It has been tested and assessed in accordance with the requirements of NZ Building Code clause E2/AS1 by a third-party organisation and has attained CodeMark certification.

About CodeMark


CodeMark product certification is a voluntary scheme that provides an easily-understood and robust way to show that a building product or system meets the requirements of the New Zealand Building Code. It was developed by the Australian Building Codes Board and the New Zealand Department of Building and Housing, in consultation with State and Territory Governments, Industry Groups and prospective Certifications Bodies. It is automatically approved by every council/territorial Authority in New Zealand.

Please refer to the Department of Building & Housing (DBH) Product Certification for more information.

How it helps your building consent process

Easier - Less hassle and easier for both the applicant and the Territorial Authority.

Quicker - The Territorial Authority does not need to do any background research, they simply need to check the validity of the CodeMark certification.

Guaranteed to be Accepted - Legislation states that a Territorial Authority must accept CodeMark certified products as complying with Building Code. As long as your building is within the scope and follows the installation specification it will be accepted. No more annoying rejections and having to resubmit your application.

Certainty - You get peace-of-mind knowing that the system has undergone testing, investigations, and audits to prove that it will stand the test of time.

The Code Mark Process

ITI Timspec is subject to annual audits and has strict Quality Assurance Systems in place to ensure that everything we do is up to standard. This system encompasses things from grading and treatment requirements for the timber through to customer services requirements such as providing correct information and handling inquiries and complaints.

We at ITI Timspec are proud that we were the first major timber importer to be FSC and PEFC Chain-of-Custody accredited. We always try to provide FSC and PEFC certified timber weatherboards. Find more information on our certifications here.

Timber Options

ITI Timspec has four CodeMark approved weatherboard systems, two horizontal and two vertical. The options available are shown in the table:

Species Profile Coating Price
Radiata Pine Bevel Back, Rusticated, Vertical, Shiplap on Batten, Vertical Shiplap on Rigid Air Barrier Pre-Primed Low-Medium
Western Red Cedar Bevel Back, Rusticated, Vertical Shiplap on Batten, Vertical Shiplap on Rigid Air Barrier Pre-Primed Medium
Accoya® Bevel Back, Rusticated, Vertical Shiplap on Batten, Vertical Shiplap on Rigid Air Barrier Pre- Primed Medium - High




This gives you a total of 540 different cladding options. Please note some profiles are stain-finished and not recommended for Radiata