Misc re-roof for sfd if a re-roof project is proposed, the following specifications apply. Existing roofing material built up roof proposed roofing material comp shingles manufacturer owens corning brand and model color (if cool roof required) built-up roofing assembly system number per attached listing report (if applicable) specific exemption from cool roof requirements (if applicable) low slope, no duct in attic 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.