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For the facade, exposed to the constant salt air, the team considered everything from copper or zinc to Kynar-coated aluminum. Eventually, a sample of titanium was tacked up for six months and showed no wear. “Part of the green philosophy is not just what is cheaper; it’s what’s sustainable,” Cranston explains. “The titanium cladding was more expensive, but this is a house we plan to be in for the rest of our lives, so we wanted something that needed virtually no maintenance.”