For over 78 years, James Hardie has been leading the way with products that define the country’s building landscape. We were the first to design and manufacture Rigid Air Barrier (RAB) products here, which now set the benchmark for superior pre-cladding.
James Hardie RAB is a solid fibre cement pre-cladding that has several advantages over traditional building underlay. It provides superior weather-tightness, structural bracing, and allows a new build to be closed in sooner. It’s available in two forms, HomeRAB Pre-Cladding, for residential builds especially in very high wind zones, and RAB®Board, for commercial builds and those in extra high wind zones.
Our Rigid Air Barriers work by equalising the air pressure inside the outer wall cavity, so the facade can stand up to wind pressures, whereas traditional building underlay can struggle to perform in these conditions.
Customers who choose James Hardie RAB want a high performance building enclosure that can withstand harsh conditions now, and in years to come:
James Hardie RAB also allows a new build to be closed in from the elements sooner, allowing work to start on the inside faster. That can save builders and project manager’s valuable time and cost on a job.
While there’s now a range of rigid air barrier products on the market, the original James Hardie RAB is the right choice, for several reasons:
Traditionally, building wraps in the cavity have formed the majority of the air seal layer around New Zealand homes.