H+R were asked to conduct a detailed timber condition investigation on the roof structure of the Flagsta Tower. The existing leaded roof was due for replacement and the Structural Engineers and estate surveyors required knowledge of any required timber remediation, prior to works commencing. Work undertaken The investigation comprised micro-bore drilling to determine the extent of any decay to the bearing ends of the large section timber carriage beams supporting the ceiling joists, as well as to the timber wall plates around the perimeter of the roof and the ceiling joists themselves. Decayed timbers or decayed sections of timber were marked on-site with chalk for ease of identication later. On-site visual strength grading was also conducted on all the accessible Blenheim Palacestructur

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