75 sf re-roof (bora) for bldg #85-108 if a re-roof project is proposed, the following specifications apply. Existing roofing material shingles to remain proposed roofing material shingles manufacturer owens corning brand and model oakridge 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) no ducts in attic per pds492 section 0. 38 exemption required building inspector field verification (if applicable) no ducts in attic (3) layer of shingles to remain note self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.