The D10 building of th Boots Factory in Nottingham, England, after major conservation works in the 1990s. (Photo: S. Macdonald).
© ICOMOS

Auguste Perret's church of Notre Dame du Rainci of 1923. (Photo: S. Macdonald).
© ICOMOS

Le Corbusier's Unité d'Habitation in Marseilles (1952). The repairs have acknowledged the importance of the surface finish of the concrete, which has been preserved. (Photo: S. Macdonald).
© ICOMOS

The Alexandra Road Housing Estate in London during the large-scale concrete repair programme in 1998. Attempts to rectify earlier poor repairs and address later problems were difficult to carry out without resulting in a blotchy looking building instead of the sleek, high quality concrete finish of the original concrete. (Photo: S. Macdonald).
© ICOMOS

The Metropolitan Cathedral of Christ the King in Liverpool, England. (Photo: S. Macdonald).
© ICOMOS