HygroShell investigates a first-of-its-kind, self-constructing-timber building system, heralding new material cultures in architecture. Utilizing novel computational methods to access timber’s inherent shape-changing properties, HygroShell showcases the design, engineering, and production of a full-scale, long-spanning, lightweight shell made from flat-packed, components curved in situ. Each component contains architectural, structural, and kinetic characteristics embedded into its flat state, actuating on site to produce a curved, shingle-clad, interlocked geometry.