Water heater replacement, no modifications or alternations to existing system

21 sf reroof for existing sfd. If a re-roof project is proposed, the following specifications apply. Existing roofing material: comp shingle proposed roofing material: comp shingle manufacturer: gaf brand and model: gaf timberline hd color (if cool roof required): shakewood specific exemption from cool roof requirements (if applicable): in climate zone 10, min. R-4 new insulation installed above roof deck. Required building inspector field verification (if applicable): yes note: self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.