Airtightness in UK Dwellings

This report summarises the findings from a large number of airtightness measurements carried out by BRE in UK dwellings. It describes how airtightness may be measured in single dwellings, the relationship of air leakage with ventilation, and ways to improve airtightness. It is aimed at those responsible for designing and supervising construction work for new and existing dwellings, whether in the public or private sector.