25 sq. Ft. Reroof if a re-roof project is proposed, the following specifications apply. Existing roofing material: asphalt shingle proposed roofing material: asphalt shingle manufacturer: gaf brand and model: timberline color (if cool roof required): shakewood built-up roofing assembly system number per attached listing report (if applicable): n a specific exemption from cool roof requirements (if applicable): cool roof exempt due to radiant barrier 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.