Roofing grommet forming a seal between a roof-mounted structure and a roof

A roof mounting system comprising:

• a roof substrate;
• a first mounting assembly including
• a first flashing coupled to the roof substrate, the first flashing defining a first flashing opening extending therethrough,
• a first bracket having a first portion extending substantially parallel to the first flashing and defining a first aperture extending therethough, and a second portion extending substantially perpendicular to the first flashing and defining a second aperture extending therethrough, and
• a first fastener extending through the first flashing opening and the first bracket aperture to couple the first bracket to the first flashing;
• a second mounting assembly including
• a second flashing coupled to the roof substrate, the second flashing defining a second flashing opening extending therethrough,
• a second bracket having a first portion extending substantially parallel to the second flashing and defining a first aperture extending therethrough, and a second portion extending substantially perpendicular to the second flashing and defining a second aperture extending therethrough, and
• a second fastener extending through the second flashing opening and the first aperture to couple the second bracket to the second flashing;
• a track having a first end securable to the first mounting assembly and a second end securable to the second mounting assembly;
• a solar panel mountable on each of the first and second mounting assemblies in a plurality of mount orientations with respect to a selected point on the substrate;
• and
• a first seal positioned in the first flashing opening and a second seal positioned in the second flashing opening, wherein the first flashing defines a first frustoconical protrusion adjacent the first flashing opening, and wherein the second flashing defines a second frustoconical protrusion adjacent the second flashing aperture.