Double curved shapes are easily produced in composite materials at almost no extra cost. For production of limited series the relatively low moulding costs are an additional benefit.
The specific weight of composites varies between 1.5 and 2.0 compared to 2.7 to 7.8 for aluminium and steel.
Slender constructions and seamless façades are examples of aesthetics driven design. These type of structures are impossible to construct with traditional materials.