The idea of the fold came naturally given the nature of the site, Josephson says. “You’re on the side of the escarpment: There’s a cliff and a plateau where the house is, and there are hills and a series of waterfalls and canyons behind it. It looks like this idyllic forested spot, but there’s a lot of relief. And then the fold is a cut into the hill.” The roof form also reflects the water motif, he says: “The fold is like a response to the softness of the program, which is water—it’s like a wave.”