20 sf re-roof for (e) sfd if a re-roof project is proposed, the following specifications apply. Existing roofing material ashpalt shingle proposed roofing material ashpalt shingle manufacturer gaf brand and model timberline hd color (if cool roof required) sandalwood built-up roofing assembly system number per attached listing report (if applicable) n a specific exemption from cool roof requirements (if applicable) n a required building inspector field verification (if applicable) old roofing to be removed note self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.