A roof-mounting device for covering a roof penetration in a roof includes a base having an open top, an open bottom, and an outer perimeter structure. An internal reservoir of the device is in communication with the open top and the open bottom, and a mount plate is disposed in the internal reservoir extending between opposed ends of the outer perimeter structure. A bore is formed in the mount plate below the top of the base, the bore for receiving a fastener for fastening the mounting device at the roof penetration. When the bore receives the fastener therein, the internal reservoir is unsevered, remaining in communication with the open top and open bottom of the base.