140 William Street

An inner city office building with extensive and intensive roof top landscaping on the 7th and 14th floors. The gardens use water-wise drought tolerant plants with contrasting coloured gravel and low angular walls. The walls are rendered with a paint finish and also in some areas clad with natural rock creating a dry stone appearance to delineate separate garden areas. These aspects combined create an angular, modern, bold landscape to contrast with Perth's striking skyline. Spaces have been created for maximum visual impact from above and at eye level, utilising contrasting foliage colour, shape and texture. Lighting, glass, stainless steel and the use of shadows and reflections contribute to the unique contemporary character. Drip irrigation systems have been used to minimise water usage. This is combined with a specialised green roof substrate mix has ensured the effective establishment of a strong root system for the plants. All materials were craned up to the different levels of this project, which posed a great co-ordination and logistics task for the team involved. However, with competent supervision and efficient project management, the job was completed both on time and on budget.