BU583 Waterproof decks (2015)

A waterproof deck is essentially a low-slope roof that is designed to accommodate loads from foot traffic when used as an outdoor living space. Typically, they are constructed with timber framing, a plywood substrate and waterproof membrane and could be over a habitable living space.

This bulletin discusses the design and construction issues that are critical to achieve reliable performance for timber-framed waterproof decks. It covers the requirements of E2/AS1, alternative options to E2/AS1 and the risks associated with the design and construction of waterproof decks.

This bulletin updates and replaces Bulletin 472 of the same name.