CMI Advisory Note: Product Certification vs. System Certification.


CMI has recently sought advice from the ABCB regarding the referencing to test results of products that have been tested in concert with other building materials to achieve specific compliance values.

For example, a wall sheeting material that has been tested for its acoustic and insulation values in a wall assembly that incorporates the sheeting, Rockwool insulation, an air gap and plasterboard.

Such an assembly may well achieve a R value of 50 + and comply with the requirements of the Building Code. However; if the CodeMark™ application for certification is for the wall panel, as a “product”, and not for the wall panel as a “system”, then the certificate of compliance cannot reference the R values achieved by the “system”.

In the case of a “product” certification, only the values actually achieved by the “product” that forms the subject of the certification can be attested to on the certificate of compliance.

If the application is for a “system” then the “system” certification must clearly identify the components that go into making up the system. For example:

The XYZ wall system consist of the following:

Product Description
XYZ wall panel The XYZ wall panel is a 12mm fibre cement wall panel.
Top Hat The Top Hats have a nominal width of 35mm
Framing Steel framing conforming to NASH Standard/Timber Framing to AS1684
XYZ Rockwool 75mm XYZ Rockwool
XYZ plaster board 10mm XYZ plasterboard
Fasteners & Fixing Fixing of Top Hat to steel framing; 10-16x16mm Hex Head Teks screw
Fixing of XYZ wall panel panels to Top Hat from inside of buildings 14-10x65mm Hex Head Type 17 Screw
XYZ Adhesive XYZ Adhesive is used for gluing the panels together at vertical and horizontal joints.


It is important to note that certification of a building system requires the Certificate Holder to accept responsibility for the other components used in the system. Such components must be clearly defined in the Certificate Holders version controlled installation manual or guide. Any installation of the certified system that varies from the description on the Certificate of Conformity (CoC) will be considered to be non-compliant in line with CMI’s Terms and Conditions and the Scheme Rules.

If you require further information on the above or clarification on any other aspect of the CodeMark Scheme, please contact your CMI Client Liaison Officer.