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PPS 6: Planning, Archaeology and The Built Heritage
Annex E: External Cleaning

E37 Cleaning a building normally requires listed building consent. This is not only because cleaning can have a marked effect on the character of buildings, but also because cleaning processes can affect the historic fabric. The cleaning of a building within a homogeneous terrace would obviously affect the appearance of the terrace as a whole. Certain efforts to clean historic buildings have created long term problems of discoloration and decay. It is equally true that some historic buildings have been enhanced by good quality cleaning. The pros and cons for cleaning buildings are therefore the basis for an ongoing debate. The keyword is care; care in assessing the work at the start, care in specifying methods and materials and care in execution and supervision.
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