- 52 sqft re-roof for (e) sfd if a re-roof project is proposed, the following specifications apply. Existing roofing material comp shingles proposed roofing material comp shingles and new sheathing manufacturer boral brand and model claylite color (if cool roof required) n a built-up roofing assembly system number per attached listing report (if applicable) n a specific exemption from cool roof requirements (if applicable) radiant barrier sheathing 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.