Hardie™ Smart Blade wall system is a versatile and high performance fire-rated wall system. Its single layer design makes it the perfect solution to separate dwellings in cantilevering balconies and ground wall extensions. Hardie Smart Blade wall system is highly compact; with a wall thickness starting as low as 102mm, delivering significant savings in outdoor living space. Perfect for tight spaces and narrow sites. Designed for timber-framed buildings where external separating walls require a Fire Resistance Level (FRL) of up to 1 hour.