Homes in New Zealand must have adequate insulation, so you need to make sure they have the right level of thermal resistance (R-value) for their location. You can find information on zone specific R-values, as well as the calculation and modelling method for showing compliance with the Building Code Clause H1.
This guidance document is relevant when using H1/AS1 and H1/VM1 4th Edition Amendment 4 2017. It does not apply to the Fifth Edition of H1/AS1 and H1/VM1 or the First Edition of H1/AS2 and H1/VM2 published on 29 November 2021. This guidance document will be removed at the end of the transition period for the new documents on 3 November 2022.