Keystone carried out the successful removal and recoating of the rooftop membrane using Sikalastic 400N as this membrane system is UV stable. The balconies to multiple units and penthouse suites on the top floor also underwent work with the removal of tiles, screed, membrane and glazing. Following the demolition of the balconies. Cracks in the concrete were repaired and waterproofed with the Ardex WPM1000 sheet membrane system, followed by an additional waterproofing system of Ardex WPM300 over the screed. New, compliant glazing with sub-sills were installed to ensure the residents do not experience future water ingress issues and to sustain their investment in the building.