Reroof for sfd if a re-roof project is proposed, the following specifications apply. Existing roofing material conc. L s-tile proposed roofing material use same s-tile after replacing underlayment manufacturer brand and model color (if cool roof required) built-up roofing assembly system number per attached listing report (if applicable) specific exemption from cool roof requirements (if applicable) required building inspector field verification (if applicable) stf note self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.