When discussing the problem of condensation in Australia, most of the focus has been on walls, but one part of the building where condensation issues have been most evident is in the roof space. The increased emphasis on energy efficiency, has led to a subsequent increase in roof space condensation, which inevitably creates problems on internal surfaces, and represents a potential health hazard through the growth of hidden mould. This CPD event will explore the facets of design and construction to avoid issues with condensation.