Summary = Roof works to the medieval South Triforium and the Great Cloister within Westminster Abbey.
Value = Approximately £1,450,000
Location = Westminster, London
Architect = Ptolemy Dean Architects Ltd
Challenge = Access issues and restrictions due to the main access route into site being through the Great Cloister - a busy area of the Abbey accessible to the public from 9.30am every day.
Solution = Under the instruction from Ptolemy Dean Architects Ltd (Westminster Abbeys Surveyor of the fabric) Bakers carried out roof works to the medieval South Triforium and the Great Cloister within Westminster Abbey.
70ft above the Abbey floor, the new gallery provides visitors with magnificent views down over the Abbey buildings and the Palace of Westminster. Roof works carried out by Bakers involved stripping the existing roof, recasting original lead and re-leading part of the South Triforium and part of the Main Cloister.
A full overhaul of the rainwater goods was also carried out, with a combination of new and refurbished lead downpipes, hoppers and chutes fitted. A new hopper, corbel stone and 22 metre downpipe was introduced, formed to mirror the Christopher Wren era hoppers that were already in use.
Bakers increased the gradient of the Triforium roof by increasing the fall of the lead bays (compliant with lead sheet association guidelines). Other structural repairs included reinforcing 300-year-old oak primary rafters using a flitch plate repair and other associated structural repairs to the oak roof.
Other works include the provision of a new access hatch and fall arrest system, stone repairs and indents to internal and external elevations and the careful re-homing of monuments and statues from other parts of the Abbey onto the Triforium floor.
The new freestanding external access ladder with a handrail was crafted from European Oak. It was a good project for our recently qualified joiner Jack Darvill to work on.
With the improvements to the rainwater goods, Bakers also undertook the renewal of the below ground drainage within the Great Cloister, which will also included the exciting addition of a fountain positioned in the centre of the Cloister, formed on York Stone paving with a lead cistern fountain.
Works were completed Spring 2018, in time for the opening of a new museum and gallery, located in the Abbey's medieval Triforium. After being hidden from public over 700 years, the Triforium became “The Queen's Diamond Jubilee Galleries”.