Condensation management in the NCC 2022: Understanding the key requirements for sarking-type materials in external walls

Controlling condensation in buildings has been a longstanding challenge for the Australian construction industry. When moisture accumulates in walls, roofs, or other assemblies, it can lead to mould, warping, and deterioration of materials. Beyond structural harm, condensation can also compromise indoor air quality, posing health risks to occupants.

Condensation Management in the NCC 2022: Understanding the Key Requirements for Sarking-Type Materials in External Walls is a detailed look at the National Construction Code requirements for external wall construction for Class 2 buildings that will help prevent the accumulation of excessive internal moisture. A key focus is the requirement for vapour permeable building membranes and sarking materials that allow water vapour to escape rather than accumulate within a facade system.

Siniat’s Weather Defence is a rigid air barrier with a gypsum core designed for use in rainscreen or ventilated facade systems. Weather Defence’s excellent vapour permeability makes it suitable for colder climates. It is classified as vapour permeable Class 4 and is recommended for use in Climate Zones 2 to 8.

Download this whitepaper for a detailed look at the National Construction Code requirements for external wall construction for Class 2 buildings that will help prevent the accumulation of excessive internal moisture.