20 sf re-roof (hra) for existing sfd 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: duration premium color (if cool roof required): sage built-up roofing assembly system number per attached listing report (if applicable): esr-1372 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.