1 May 2019 marked the end of the concession period for acceptable demonstration of Group Numbers for building linings as required by the National Construction Code of Australia. This affects soffit insulation that is exposed to the space below, as it is then also effectively a building lining.
Specifying Kingspan Kooltherm K10 G2 soffit board will insulate soffits in a compliant way. These soffit boards are Group 2, AS 5637.1 compliant (ceiling and walls fire classification) and CodeMark-certified for NCC compliance. They are also fibre-free with a closed-cell insulation core and Australian made. kingspan.com/au/en-au/products-brands/insulation/insulation-boards/new-kooltherm-k10-g2-soffit-board