26 sf re-roof () if a re-roof project is proposed, the following specifications apply. Existing roofing material asphalt shingles proposed roofing material asphalt shingles manufacturer owens corning brand and model tru definition duration color (if cool roof required) sierra gray crrc product# 0890-0013 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 replace roof sheathing as needed