Two decades later it became widely known that the use of this material caused illnesses and deaths, and whilst some of it was removed over the course of the life of the buildings – between 1979 and 1982 the buildings were fitted with coloured metal overcladding to cover the exterior asbestos walls, whilst the slab blocks had additional external fire escapes built in the late 1980sWilliamson, Elizabeth, et al. The Buildings of Scotland: Glasgow, Penguin Books 1990, p. 477
