A roof attachment assembly for mounting to a roof substrate. The roof attachment assembly comprises a plate having a substantially frustoconical protrusion defining an aperture extending therethrough, the plate defining a first surface and a second surface, the first surface facing the roof substrate and the second surface spaced from the roof substrate. The roof attachment assembly also comprises a membrane positioned adjacent one of the first surface and the second surface of the plate, and a bracket positioned proximate the second surface of the plate, the bracket operable to support one or more roof mounted fixtures. The roof attachment assembly further comprises a fastener extending through the bracket, the membrane and the plate, the fastener operable to couple the bracket, the membrane and the plate together, wherein the roof substrate is contiguous adjacent to an end of the fastener.