Hardie RAB Board 6mm

Hardie RAB Board 6mm is a James Hardie Rigid Air Barrier (RAB) board — a 6mm fibre cement sheet used as a structural bracing, air barrier and cladding substrate in timber-framed wall construction. Installed directly to the face of wall framing, it provides racking resistance, an air infiltration barrier and a durable, moisture-resistant substrate for the cladding system above.

Overview

• James Hardie 6mm Rigid Air Barrier (RAB) board for timber-framed wall construction
• Functions as a structural bracing panel, air barrier and cladding substrate in one product
• Installed directly to the face of timber wall framing
• Available in standard sheet sizes — check with Tramin for current dimensions
• Compliant with relevant Australian Standards and NCC requirements for bracing and air barriers

Key Features & Benefits

• Provides structural racking resistance to timber wall frames as a bracing element
• Acts as a rigid air barrier, reducing air infiltration and improving the building's thermal performance
• Moisture-resistant fibre cement resists water ingress at the wall frame level
• Creates a durable, dimensionally stable substrate for cladding installation above
• Non-combustible — improves the fire performance of the wall assembly
• Termite and pest resistant without chemical treatment
• Eliminates the need for a separate bracing and air barrier product — simplifying the wall build-up

Applications

• Structural bracing in timber-framed residential wall construction
• Rigid air barrier layer in energy-efficient wall assemblies
• Substrate for James Hardie cladding systems in cavity wall construction
• New residential homes and renovation projects with timber framing
• Bushfire-prone area wall assemblies requiring non-combustible substrates