A 1,600-1,800 square foot, single story house is divided into public and private spaces along the spine of a shed, standing seam metal roof suggestive of butterfly wings. Like the Tree House, it is oriented for cross ventilation with operable windows and sliding doors. A screened porch also runs along its length and opens to public spaces that include a kitchen, living and dining areas. A deep steel channel takes water from its sloping roofs during Houston’s heavy rainfalls, and empties it into rock beds below. It’s another perfect urban or country retreat for a homeowner who wants to be on the cutting edge.