Siniat Weather Defence is a high-performance external sheathing board designed to deliver superior protection in Australian construction conditions. Made with a glass fibre-reinforced gypsum core and a special weather-resistant coating, it provides excellent resistance to moisture, wind, mould, and fire—making it ideal for external wall systems behind cladding.
This board is a game-changer for builders and installers needing a fast, reliable and durable solution. Unlike traditional sheathing boards, Siniat Weather Defence can be left exposed for up to 12 months, allowing construction to continue without delays due to weather.
Commercial and residential external facades
Lightweight steel or timber framed construction
Modular builds
Projects requiring an FRL-rated external wall system
Weather-resistant – can remain exposed for up to 12 months
Fire rated (FRL compliant) – suitable for fire-rated external walls
Mould and moisture resistant – protects the frame during construction
Dimensionally stable – minimal movement or swelling
Quick to install – no need for additional sealing or wrapping
Low maintenance and long-lasting
If your project needs a sheathing solution that handles Australia’s unpredictable weather, choose Siniat Weather Defence. Available now from Westgyp, your trusted supplier of quality building products in WA.
SAP Material | Length | Width | |
---|---|---|---|
13 x 1200 x 2400 Weather Defence™ | 4082431 | 2400 mm | 1200 mm |