ROOFTOP CITY Could Sydney save itself, solve affordability, generate density, combat climate change, maintain heritage and create a whole new way of living just by adding a storey or two on top? Warren Livesey thinks so, and his argument is compelling. Livesey is founder of ARAD, the Association for Rooftop and Airspace Development with 15,000 members internationally and 75 rooftop developments in Sydney so far. He joined Elizabeth Farrelly this week on THE SYDNEYIST to discussabout whether Sydney can generate a whole new layer of city incrementally, spreading the profit and without immense destruction.