Shaped with clean lines, rich textures and fine detailing, this home proves that a restrained materials palette can make a strong statement. Sometimes it is easier to start from scratch—imagining a whole space and choosing every detail to serve a new creative vision. But Australian interior designer David Flack, founder and head of Flack Studio, decided to assign himself the challenge of retaining some beautiful, original elements of this 15-year-old, faux Georgian duplex loc