The H1 change which is to be implemented from 01 May 2023 requires the use of thicker insulation to help NZ homes and buildings to be warmer, drier and more energy efficient. However, as roof insulation increases in thickness and with warm moist air entering the roof space from the internal living area, there are greater risks of interstitial condensation in the roof structures if balance of heat, air and moisture movement is not considered in the roof designs. Poor moisture management can lead to failing to achieve a warm, dry, healthy home. It can also lead to deterioration of the building structure and other components as well as significant potential health risks for occupants.
DriSpace offers H1 ventilated roof system solutions by incorporating passive ventilation, high vapour permeable underlay, vapour control layers and airtight membranes to provide condensation control and air barrier solutions.
See below for the H1 Solutions.