The client, a retired botanist named Elena, touched his arm. “It’s not a roof,” she said. “It’s a catchment. A wing. A prayer for water.”
Leo looked up. The butterfly’s wings, coated in cool-white TPO, reflected the bruised purple sky. He thought of that ghost engineer’s note— “Trust me.” butterfly roof construction detail pdf
A PDF opened like a time capsule. The paper was beige, the ink slightly smudged. But the detail… it sang. A central box-gutter, tapered insulation at a precise 1.5%, a hidden scupper wrapped in copper, and a double layer of plywood with a peel-and-stick membrane that looked suspiciously like a modern product Neutra had somehow invented thirty years early. In the margin, in pencil, someone had written: “For heavy rain, add a second scupper. Trust me. – D.” The client, a retired botanist named Elena, touched his arm