studio de.materia has completed a set of twin apartment buildings in karpacz, a town in poland’s karkonosze mountains, whose design takes cues from examples of vernacular architecture. a solid stone plinth of hand-formed gneiss rocks forms the exterior of the two lower floors of the buildings, while a much lighter wooden frame wraps the upper levels. at the same time, strategically placed full-height glazing on all floors offers views of the surrounding landscape.