The key aim of the works was to redirect stormwater run-off away from the original limestone masonry walls, with the intention of minimising physical intervention.
Poor stormwater and ground water drainage, in combination with previous poor repairs, contributed to the deterioration of original stonework. Some anticipatory conservation works had already been completed, including the removal of asbestos roofing, partial re-roofing, and the repair/replacement of rusted rainwater gutters and pipes.
However in a number of locations – namely the South Courtyard, the North Courtyard, the walkway between the eastern wing and the former TAFE Jewellery Studio, and the small northern toilet addition to the east wing - direct discharge of stormwater onto the masonry was still occurring.
The works carried out are summarised as follows:
- Dismantle the exercise cages in south courtyard;
- Rectify drainage issues in south courtyard;
- Install new concrete sumps to existing downpipes and connect these to the existing stormwater service;
- Install a new gutter and downpipe to the south courtyard link roof and connect to the existing stormwater service; and
- Form sterile zones, filled with crushed rock, around the walls in the South Courtyard and along the east elevation of the east wing, to enhance moisture evaporation.