40 sf reroof existing sfd if a re-roof project is proposed, the following specifications apply. Existing roofing material asph shgl proposed roofing material asph shgl cool roof manufacturer owens corning brand and model tru def duration cool shingle color (if cool roof required) forest brown built-up roofing assembly system number per attached listing report (if applicable) specific exemption from cool roof requirements (if applicable) old roofing completely removed required building inspector field verification (if applicable) note self-certification by a licensed contractor is acceptable for interior attic work needed for this permit, if a signed letter on company letterhead is provided to the building inspector.