Located in Bukit Rimau, Shah Alam, this private residence built in 2004 is punctuated with the two large fin walls that structure the logic of the house. As conceptual book – ends, these fins contain a linear sequence of spaces, the movement through the house is punctuated by a series of thresholds – visual, physical as well as notional elements – that signify transitions between private and public. A large courtyard ties the experiences together and forms the nexus to the other spaces. We used exposed form concrete casting methods to express the large fins as a counter to the white walls of the rest of the house, providing a visual anchor that draws the looker from observing a static object to looking at something more visually dynamic.