Historic previous repairs in inappropriate cements had resulted in considerable decay to the soft sandstone and repairs were essential to conserve the detail of the facades as well as protect pedestrians from falling masonry on the public footpaths below.

Following detailed investigations from a Mobile Elevated Working Platform (MEWP) an accurate understanding of the condition of the masonry was ascertained. This enabled a detailed schedule of repair work to be formulated that would see much of the decayed sandstone replaced and vulnerable weathering features protected with lead cappings.

The specialist masonry contractor worked extremely closely with the client on the high security site and the building was able to be maintained in operation throughout the works.

Accurate survey information is vital

MEWP access prior to the works going on site allowed for very accurate recordings of the existing condition of the masonry even at high level. Detailed specifications and precise schedules of work could be drawn up so that there was very little need for variation in the works during the construction phase.