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Weather Barrier - RAB Board | James Hardie Australia

  • Use

    Weather barrier in exterior façades
  • Applications

  • Characteristics

    Can be exposed for up to 180 days during installation, CoreShield™ penetrating sealer technology, lightweight
  • Guarantee

    10-year warranty

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More about this product

RAB™ Board is a rigid air barrier that defends external façades against wind and moisture by James Hardie. Made of a 6mm fiber-cement sheathing, the protective board is installed behind external cladding or rainscreens to improve the durability, performance, and comfort of the building.

RAB™ works by equalizing the air pressure within the external wall cavity, giving airtightness and superior weather-tightness, structural bracing, and fire protection. This differs from traditional flexible wall underlay, which can struggle to perform in challenging weather conditions.

RAB™ Board panels are sealed with CoreShield™ penetrating sealer technology from James Hardie, keeping water, air and wind out but still allowing moisture vapor to escape. Easy to install the boards can be exposed for up to 180 days before cladding is installed.

Improved Building Performance with Lower Risk

The RAB™ Board solution creates a continuous weatherproof seal across the façade. It is a fully flexible solution when it comes to selecting cladding to cover it. Building performance is improved through condensation management and thermal efficiency improvements.

  • Made for high wind pressures
    The strength of RAB™ Board helps equalize air pressure inside the wall cavity, allowing buildings to stand up to 7kPa high wind pressures. The fiber cement material can withstand wint without tears or openings forming
  • Suitable for non-combustible construction
    Non-combustible and suitable for all classes of building, offering ongoing peace of mind.
  • Quick and Easy to Install
    RAB™ Board is lightweight, easy to cut with a 'score and snap' knife, and screw or nail to the frame, while the joints are simply taped. Leave

Features & Benefits

  • Superior weather defense behind ventilated rainscreen cladding
  • Suitable for non-combustible construction
  • Resistant to moisture and the elements
  • Breathable, allowing water vapor to get out
  • Provides 180 days of protection during construction
  • Withstands wind pressures up to 7kpa

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