81 sqft re-roof to hidden valley ranch rehab services. If a re-roof project is proposed, the following specifications apply. Existing roofing material 2 layer hot-mopped built-up roof proposed roofing material dibiten d312 manufacturer john manville brand and model dibiten d312 color (if cool roof required) white cap sheet 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) yes remove (e) built up roofing install 2-layer john manville dibiten torch-down white cap adding osb 7 16" plywood note self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.