4300sf re-roof for existing sfd if a re-roof project is proposed, the following specifications apply. Existing roofing material asphalt shingles proposed roofing material same manufacturer owens corning brand and model tru-def color (if cool roof required) antique silver, crrc # 0890-0011 built-up roofing assembly system number per attached listing report (if applicable) n a specific exemption from cool roof requirements (if applicable) n a required building inspector field verification (if applicable) yes note self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.