38 sf re-roof for existing sfd. If a re-roof project is proposed, the following specifications apply. Existing roofing material: shake proposed roofing material: comp shingle manufacturer: owens corning brand and model: oakridge color (if cool roof required): brownwood built-up roofing assembly system number per attached listing report (if applicable):na specific exemption from cool roof requirements (if applicable): radiant barrier and r-30 required building inspector field verification (if applicable): na note: self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.