Etymologically the word Inter-est comes from the Latin words inter- and -esse, and means "what is between two or more people, or what joints but separates them". The prefixe inter-, in most cases, describe actions as outlined above. With this additive operation twinning of words arise, the inter-stice as "media slot or space between two bodies or between two parts of the same body," and so on inter-val, the inter-section, inter-act, the inter-mediate and ...... and mezzanines. The in-between spaces have a dual condition to join and segregate. This interwoven defines this invisible sandwich as the materialization of the negotiation between two or more elements forming a third party. As Josef Albers stated in its text Search Versus Re -Search that " in design, sometimes one plus one equals three." The origin of the gaps is strongly linked to the concept of limit. These arise from vibration and appropriation of a boundary condition traffic symbiosis between the two. Hegel defined two types of limit: Schranke and Grenze. The first one is the limit a wall, the barrier of an object itself. This limit belongs to the object that contains somehow represents his finitude. However; Grenze, the limit as bondery, describes the space between the body and its environment. It's not a plane, but is a space of negotiation between its essence and in the context in which it operates. This " complex and contradictory " amniotic fluid allows to establish a framework for spatial analysis, not the space itself but from the ability to contact each other. Often these areas have been considered "residue" by their hybrid status. In the second half of the twentieth century several members of Team X re-discovered in vernacular architectures of remote civilizations, those spaces forgotten by the International style. However, during the last century also appear a number of technological developments that will require specific material answers to new demands. These "stupid" spaces will be another challenge in the realization and projection thereof.
