A system for flashing a mount of a photovoltaic assembly on a surface includes a flashing with a lower surface and an upper surface. The flashing defines an opening to receive a fastener for securing the mount to the surface. The system also includes a seal extending around the fastener when the fastener is positioned in the opening. The seal provides a first barrier to inhibit water intrusion through the opening. The system further includes a pad attached to one of the lower surface and the upper surface, wherein the pad provides a second barrier to inhibit water intrusion through an interface of the flashing and the surface.