With the adoption of private certification and the evolution of increasingly complex and multinational building product supply chains, the way in which building materials in Australia are selected, used and approved has changed over recent decades.

What has not changed, however, are the provisions contained in Part A2 of National Construction Code (NCC) Volume One and Three and Part 1.2 of NCC Volume Two, which set out the requirements which designers, builders and certifiers need to follow in order to determine whether or not sufficient levels…