The Economic Times

In 2013, Robert Downey Jr. commissioned Nicol Bini to create a Malibu Binishell with thin-shell concrete; nine years later, the 6,500-sq-ft home was completed

Robert Downey Jr.'s unique guest house took nine years to complete. This unusual structure utilized a Binishell technique involving inflated concrete balloons. The construction process required custom-built elements due to the dome's curved walls. Engineers are studying these concrete domes for their material efficiency and strength. While expensive and slow, the home highlights innovative construction possibilities.