The compound curve of the dome makes it stronger and longer lasting than virtually any other structure. They also take much less money and time to construct compared to conventional, rectangular buildings of the same size.
EcoShells are constructed with an airform, a rebar cage embedded in 2 or 3 inches of concrete, and a simple roof coating over the outside. And because of the concrete’s thermal mass, interior temperatures remain stable. One EcoShell's Airform can be peeled off to create 100 domes.
EcoShells are a great solution in less developed countries where sustainable structures are greatly needed.
The EcoShell is NOT an alternative for housing in U.S. climates - except for Hawaii.