Primary dust exposure pathways
Primary dust exposure pathways that disturb large volumes of dust particles into the living areas of the house include:
Damaged roof and/or collapsed ceiling because of water or storm damage; Renovating and modifying the ceiling or roof (e.g.. installation of attic ladders, electrical cables, skylights or working within the confines of the roof space); Addition of an extra room or upward extension; and Piercing the roof and/or ceiling by a projectile.
Secondary pathways of dust exposure are dependent on micro air currents to promote movement of particles into the living areas. Their pathways into the living areas are not obvious, but can be identified by black trails around the point of entry and include:
Ceiling roses; Cracks in cornices; Exhaust fans and Wall vents.
Reference: Davis, Jeffrey J; Gulson, Brian L; Graduate School of the Environment, Macquarie University, Ceiling Dust: A Potential Urban Environmental Problem
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Last Updated 18 June 2013