25 sf re-roof if a re-roof project is proposed, the following specifications apply. Existing roofing material concrete tiles proposed roofing material concrete tiles (re-use existing tiles, replace underlayment and install radiant barrier) manufacturer - brand and model - color (if cool roof required) - built-up roofing assembly system number per attached listing report (if applicable) na specific exemption from cool roof requirements (if applicable) no required building inspector field verification (if applicable) yes note self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.