The Siniat 13mm Weather Defence is a high-performance external sheathing board designed to provide exceptional weather resistance for commercial and residential construction. Manufactured with a moisture, mould, and fire-resistant core, it offers long-term durability while maintaining breathability to reduce the risk of trapped moisture. Ideal for façade systems, external wall linings, and lightweight construction, Siniat Weather Defence is quick to install and eliminates the need for additional water barriers. Its robust design withstands harsh weather conditions, making it the perfect choice for projects requiring high-strength external protection. Available for fast delivery across Perth, Adelaide, and regional WA & SA.