Although it broke ground before Palo Alto, CA's green building ordinance was adopted, the Arbor Real home development includes environmentally sensitive components, not the least of which is its roofing. The DR Horton community used 18-inch, SL1750 Titan standing seam metal roofing from Custom-Bilt Metals exclusively. The color palette is appropriate for the region and building color scheme, and includes Weathered Copper, Parchment, and Zinc Grey. A fourth color, Medium Bronze, was a custom formulation for the project.