In this project, the aim is the experimentation and further development of a new composite material made out of plywood, fiber glass and resin. It proposes a fabrication logic to design large continuous double skin, self structural and performative surfaces. The project introduces a step forward in the manipulation of plywood panels, pre-stressing them in a form finding process to achieve curvatures; thus, developing large structures. Through a reinforcing construction process necessity of big mandrels is avoided. Digital simulations and physical experiments were implemented in the research in order to achieve real possible geometries, to reduce weight and to simplify the structure. THE OBSESSION WITH A SURFACE The project gets the interest of producing one continuous surface based on the material behavior just as Dieste explored deeply in his research where he recognized that the surface offered a realm formal exploration that in turn, could solve structural problems. The surface is the result of environmental, structural and architectural necessities. Its efficiency responds to the optimization process. Therefore form and expression, fabrication and structural efficiency led the development of a new language of building. The optimization process determines the final shape. The shells are the material with certain thickness, but the shape is still more fundamental as it contains the space and the quality of itself.