13 sf re-roof if a re-roof project is proposed, the following specifications apply. Existing roofing material boral vs tile - clay proposed roofing material lift & relay using (e) tile manufacturer boral brand and model us tile clay 1 piece s-tile color (if cool roof required) n a - zone 7 built-up roofing assembly system number per attached listing report (if applicable) na specific exemption from cool roof requirements (if applicable) zone 7 required building inspector field verification (if applicable) note self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.