Hra- re-roof for existing sfd if a re-roof project is proposed, the following specifications apply. Existing roofing material: asphalt shingles proposed roofing material:sphalt shingles manufacturer: gaf brand and model: timerline hd 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.