A mounting bracket includes a cover plate, a back plate and a deflecting strip depending from the back plate. The deflecting strip directs water cascading down along the back plate away from the wall of the building structure. The bracket further includes a connecting projection formed on the cover plate and a receiving socket formed on the back plate. When mated with each other, the projection and socket allow the cover plate to be positioned in any one of an infinite number of positions, within the connection range, relative to the back plate. The connecting projection and receiving socket are each formed in a position on its supporting component that is laterally offset from a center line bisecting the component. This design placement allows the connecting projection and the receiving socket to be matingly aligned when the cover plate and back plate are brought together for assembly in a working mode. The design placement further allows them to be laterally offset from one another when the cover plate and back plate are brought together for nesting relationship in a transport mode. The back plate is provided with sets of alternative attachment spots that are protected from exposure and permit alternative types of attachment elements to secure the bracket to the wall of the building structure.