25 sqft re-roof if a re-roof project is proposed, the following specifications apply. Existing roofing material corregate metal proposed roofing material owens corning shingles manufacturer owens corning brand and model moutainside tru definition color (if cool roof required) n a 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) yes note self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.