21 sq sf re-roof for (e) sfd if a re-roof project is proposed, the following specifications apply. Existing roofing material ashalt shingles proposed roofing material ashalt shingles manufacturer owens corning brand and model trudefinition duration cool shingles color (if cool roof required) mojave, crrc product 0890-0017 built-up roofing assembly system number per attached listing report (if applicable) n a specific exemption from cool roof requirements (if applicable) no required building inspector field verification (if applicable) yes might replace small area of roof sheathing if damaged. Note self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.