BU567 E2/AS1 flashing requirements (2013)

Flashings play an important role in preventing moisture getting into the building envelope and draining out any moisture that does get in. This bulletin outlines the minimum requirements for flashings to comply with E2/AS1 Third Edition incorporating Amendment 5.

This bulletin updates and replaces Bulletin 465 Domestic flashing installation and Bulletin 467 Principles of flashing design.

The bulletin covers:

• where flashings are required
• New Zealand Building Code requirements
• selection of flashing materials
• specific flashing requirements, including apron flashings, cap flashings, barge flashings, wall cladding corner flashings, ridge and hip roof flashings, roof penetrations, door and window flashings, horizontal joint or inter-storey junction flashings, flashing vertical junctions between different materials, flashing meter boxes, eaves flashings, saddle flashings and backflashed joints
• installing flashings.