The Case Study House in Hamburg is a reinterpretation of the prefab as a city dwelling. It is a complex of modular residential units of various sizes that fit together like a construction kit. The smart energy concept takes advantage of the entire shell to produce energy and save resources. As a green element, the X-TEND stainless steel mesh is an integral part of this concept. Vertical frame components with mesh and border cables to contain the perimeter are installed in front of the balconies.