20 sf re-roof (hra) for (e) 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, sand dune color (if cool roof required): no built-up roofing assembly system number per attached listing report (if applicable):n a specific exemption from cool roof requirements (if applicable): r-38 insulation required building inspector field verification (if applicable): no note: self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.