A roof attachment assembly to be mounted on a roof substrate. The assembly comprises a plate having a substantially frustoconical protrusion, the plate defining a first surface and a second surface and including an aperture. The assembly further comprises a first membrane positioned adjacent to the first surface of the plate, a second membrane positioned adjacent to the second surface of the plate, a bracket positioned proximate the second membrane and the second surface of the plate, the bracket operable to support one or more roof-mounted fixtures, and a fastener extending through the bracket, the membranes, and the plate, the fastener operable to couple the bracket, the membranes and the plate. The assembly also comprises a second fastener that substantially mates with the bracket, wherein at least one of the fastener, the plate, the first membrane, and the second fastener includes at least one pre-determined breaking point.