BU699 Warm roofs in domestic construction (June 2025)

Warm roofs are becoming increasingly popular in residential builds, offering improved thermal performance, energy efficiency and reduced risk of condensation and mould compared to cold roof systems. They also support the performance of services like ducted heating and ventilation systems. While traditionally used in commercial construction, warm roofs are now a growing feature in New Zealand homes. This bulletin explores how and why to use them in domestic settings.