Weather Defence™, the rigid air barrier used behind facade cladding systems to create a pressure equalised cavity, is now proudly distributed by Siniat in Australia.

Weather Defence provides the quickest way to achieve a weathertight building and an array of design benefits.

Weathertightness

Weather Defence board comes with a distinctive purple paper fleece liner. It can be installed and exposed on frame for twelve months during construction, providing more flexibility to the project timeline. It allows internal trades to start their work earlier, reducing the construction cycle.

It’s excellent vapour permeability makes Weather Defence suitable for Australia’s colder climates. It is classified as vapour permeable Class 4 and it is the only rigid air barrier board that complies with NCC2022 in Climate Zones 6,7 and 8. It can be used in high wind zones of the facade.

Safe and easy to install

Weather Defence is a great alternative to cement-based external sheathing boards because it is safe and easy to work with and saves valuable time. The board can be simply be scored and snapped with a retractable knife, reducing the need to use power tools with the associated site noise and dust emissions.

Weather Defence is also ideal for creating corners or curves.

The Weather Defence system is sealed with Pro Clima tape to form airtight junctions around complex details and an additional pliable membrane may not be required.

Weather Defence is a compliant material in façade systems requiring non-combustible construction.

Improved sustainability

Several inherent properties make Weather Defence a sustainable choice.

It is easier to achieve airtightness with rigid air barrier boards than plastic wall wrap. A lack of airtightness can result in wind washing through the glasswool insulation, greatly reducing thermal performance.

By improving thermal performance the building’s energy efficiency is also increased.

Weather Defence can improve the durability of the façade system. In hot and humid climates, any air that enters the building contain lots of moisture, which can lead to mould, rust and wood rot forming in the wall cavity. Weather Defence air barrier board prevents this from happening, increasing the longevity of the façade system.

Improved comfort

Due to its dense gypsum core Weather Defence can help reduce external noise from entering the building. The improved airtightness also prevents moisture from working its way into the building to increase internal humidity. This translate into greater indoor comfort long after construction has been completed.

System components

In Australia Weather Defence air barrier board and screws are supplied by Siniat. The tapes required to complete the installation is supplied by Pro Clima.