Work involved the complete re-roofing of the main roof and port cochere in a combination of lead and natural slate. Due to the extensive nature of the work combined with the historical importance of the building, work was carried out beneath a large temporary roof. A total length of 35,000m (just over 20 miles) of scaffold tube was used in the construction of the scaffolding and 5000m2 of roof sheeting used in the temporary covering. This equates to just under half the area of a football pitch.
120 tons of lead was used in the re-roofing. It was interesting to note that almost every possible aspect of leadwork was covered – cast lead hoppers and rainwater goods, flat roofing, pitched roofing, parapet gutters, cornice cappings, hips, ridge, flashings etc – the full spectrum.
Work also included considerable repair to the historic timber substrate; new roof lights and access doors; thermal insulation upgrade; significant repair and conservation of the historic stonework; a new lightning protection system; flue liners to several existing chimneys; a new fall restraint system to provide a safe and compliant future maintenance access.
The project duration took about 18 months and was completed ahead of time and under budget!