The disclosure is directed to a roofing assembly. The roofing assembly can include trusses, purlins, and purlin collars. Purlins can be attached to the trusses, and purlin collars can be attached to the trusses, to the purlins, or both. The purlins and purlin collars can be attached using chemical and/or mechanical fasteners. In one embodiment, the purlins and purlin collars are attached to the trusses with nails. Another embodiment of the disclosure includes an integrated starter-terminator that includes a hat section, a fascia, and a soffit return. The starter-terminator can be attached to the purlins, the purlin collars, or both, and can be attached to the roofing system using any desired attachment mechanisms, including nails.