An impervious elongated plate is fastened to a building, near the edge of the rooftop. The plate forms a rebound surface with an uninterrupted slope extending downwardly away from the building. Rainwater falling over the edge of the rooftop, strikes the surface, rebounds, and is dispersed along an extended area at ground level, away from the building. The plate may be flexible and resilient, with a memory so that the plate deflects downwardly under load, but returns to its initial position after the load is removed. The plate may be formed as a single work piece. The plate may be extruded from a plastic material. A method includes the step of securing an impervious surface at an uninterrupted slope near the edge of a rooftop so that rainwater falling over the edge strikes the surface. A major portion of the rainwater is directed downwardly and outwardly along the slope. The major portion of the rainwater is scattered as a spray of water droplets falling onto the ground below.
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