3600sf re-roof for existing sfd if a re-roof project is proposed, the following specifications apply. Existing roofing material wood shake proposed roofing material light weight tile manufacturer boral brand and model clay max color (if cool roof required) n a built-up roofing assembly system number per attached listing report (if applicable) specific exemption from cool roof requirements (if applicable) no ducts in attic 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.