Gravis Floor Panel

Hardie Gravis Panel Floor is a high-performing 75mm autoclaved aerated concrete (AAC) tongue and groove subfloor system, purpose-built to bring the strength and comfort of concrete to first floors, suspended ground floors, decks, and balconies in both residential and multi-residential construction. Measuring 1800mm in length and 600mm in width (product code 900014), the panel provides a solid, stable base for any floor covering, delivering a concrete-like feel underfoot that is completely free from the squeaks and bounce commonly associated with traditional timber subfloor systems. Its aerated structure offers excellent thermal and acoustic insulation, significantly reducing noise transmission between levels and helping to maintain comfortable temperatures throughout the home year-round. Non-combustible and fire resistant, the Hardie™ Gravis™ Floor Panel is a smart, compliant choice for builders seeking performance and speed on site — once installed, the system is ready to accept floor finishes within just 24 hours, keeping your build on schedule and on budget. Backed by James Hardie's trusted expertise, CodeMark certification, and a 25-year warranty, it's a dependable subfloor solution engineered for the demands of modern Australian construction.