NHBC's licensing scheme for PRC repairs

In 1980 the Building Research Establishment (BRE) was alerted to a potential problem with pre‐cast reinforced concrete (PRC) houses. A fire in an Airey‐type house had exposed the pre‐cast concrete columns and there was evidence that severe corrosion had taken place. A survey was carried out from which the conclusion was drawn that some PRC houses were at risk from carbonation and chloride problems.