25 sq. Ft. Reroof if a re-roof project is proposed, the following specifications apply. Existing roofing material asphalt shingle proposed roofing material asphalt shingle manufacturer gaf brand and model timberline color (if cool roof required) shakewood built-up roofing assembly system number per attached listing report (if applicable) n/a specific exemption from cool roof requirements (if applicable) cool roof exempt due to radiant barrier required building inspector field verification (if applicable) n/a note self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.