Code of Practice v3.0 Online
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.
COP v3.0:flashings
View Whole Section for External Moisture Flashings
This section should be read in conjunction with 6 External Moisture Overview and 9 External Moisture Penetrations.
The purpose of a flashing is to divert water away from any point of entry and to make a building weatherproof.
Flashings are not only required to weather the many junctions on a roof or wall structure but are often a highly visible part of the roof and wall cladding design. Therefore, they perform an important role in the aesthetic appearance of the building.
It takes longer to make and install flashings than fixing roof or wall cladding, so designers should be aware of the cost effects of design complexity.