The NZ Metal Roof and Wall Cladding Code of Practice is a comprehensive design & installation guide, and a recognised related document for Acceptable Solution E2/AS1 of the NZ Building Code.
NZBC G7 aims to safeguard people for illness or loss of amenity due to isolation from natural light and the outside environment.
Habitable spaces shall provide adequate openings for natural light and visual awareness of the outside environment.
Natural light shall provide an illuminance of no less than 30 lux at floor level 75% of the standard year.
Openings to give awareness of the outside shall be provided in suitable locations.