Building envelope design is not just about keeping out the rain and the wind. We are increasingly faced with the challenge of balancing the need to keep out, or let in the cold or the heat, daylight, fresh air or contaminated air, sound, fire and humidity as appropriate for all seasons, and all times of the day.
Long perceived to be immune from such problems, ‘the lucky county’ has seen an increase in the occurrence and severity of condensation problems across disparate climate zones as standard designs start to fail.
An ABCB nationwide survey estimates that about 40% of new and existing buildings suffer from condensation. The NCC 2019 includestrodice is the first version of the code with a dedicated condensation management section under health and amenity.
The presentation considers the role played by various control layers and how they impact design and specification to aid the understanding and effective management of condensation risk.