2200sf reroof for existing sfd. If a re-roof project is proposed, the following specifications apply. Existing roofing material: comp proposed roofing material: comp manufacturer: owen corning brand and model: duration premium color (if cool roof required): sage built-up roofing assembly system number per attached listing report (if applicable): na specific exemption from cool roof requirements (if applicable): na 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.