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Presbytery Floor, Peterborough Cathedral

Almost all of the green tesserae to the mosaic presbytery floor were decaying and delaminating due to an inherent weakenss in the slate used. I managed a project and led a team of conservators to replace all the green tesserae with a more durable marble substitute. Areas were cut out by hammer and chisel and replaced one by one on a softer lime mortar. For larger areas, tracings were made and new panels fabricated on paper before being installed and the paper removed. Many of the other coloured tesserae were found to be damaged and were also replaced and hollow areas of the floor were consolidated with grouting. Approximately 130,000 tesserae were replaced over a period of 9 months.

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