The present invention is a device to remove gravel from a roof. The device is a blade assembly vertically mounted on a riding drive mechanism, such as a tractor, and the blade assembly has a smooth, horizontal blade, such as used for snow plowing, and mounted proximate and parallel to the smooth blade is a serrated blade having an up position and a down position. In the down position, the serrations extend to the roof to loosen and remove gravel. In the up position, the serrations are above the edge of the smooth blade which scrapes the loosened gravel. A downward force is provided to force the serrations between the gravel.