23 sf re-roof for (e) sfd if a re-roof project is proposed, the following specifications apply. Existing roofing material asph shingles proposed roofing material asph shingles manufacturer owens corning brand and model trudefinition duration, oakridge color (if cool roof required) oyster shell crrc product id #0890-0012 built-up roofing assembly system number per attached listing report (if applicable) no specific exemption from cool roof requirements (if applicable) no required building inspector field verification (if applicable) yes, complete re-roof note self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.