A rigid air barrier board sits within the external wall build-up, fixed to the structural framing behind the cladding system. In Australia, its position and fixing details need to suit the wall design, including openings and junctions with floors and roofs. Set these out before work begins so the board can be fitted and sealed around the frame.

Rigid Air Barriers

Rigid air barriers form part of the building envelope, so their design needs to be coordinated with insulation, cavity depth and cladding. Board edges, window reveals and service penetrations all affect how the layers meet. Check that the specified rigid barrier boards are compatible with the adjoining materials and that installation details are available to the trades on site.

How should a rigid air barrier board be specified?

Match the board’s properties and fixing method to the wall framing and the complete wall design. Confirm requirements with the project specification and product documentation.

How should services pass through rigid air barriers?

Coordinate service routes before installation where possible. Detail each penetration with a compatible sealing method and allow access to complete the work.

Can rigid air barrier boards stay exposed during construction?

Check the product documentation for permitted exposure and duration. Protect the boards or schedule cladding installation to suit those limits.