These windows are facing south and southwest because Randolph wanted to maximize views of the oak trees. "The overhang above the windows provides shade and keeps the house cooler," he says. Because of energy-efficient moves like this, the house received a Five-Star Energy Rating from the Austin Energy Building Group. Other energy-efficient moves included using spray-on insulation, solar panels on the roof, low-flow dual-control toilets, formaldehyde-free cabinets, local brick and a green building process (i.e. keeping a clean site as they went along and making sure that leftovers were recycled).