25 sf re-roof like for like (asphalt shingle) if a re-roof project is proposed, the following specifications apply. Existing roofing material asphalt proposed roofing material asphalt manufacturer ownens corning brand and model duration (crrc#0890-0013) color (if cool roof required) sierra gray 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) n/a note self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.