For aging roofs, a thorough contractor checks soft spots, nail pops, and failing caulk

https://www.scribd.com/document/1009182824/Roofing-Companies-Guide-to-Ventilation-and-Attic-Health-165311

For aging roofs, a thorough contractor checks soft spots, nail pops, and failing caulk, then provides a phased plan for repairs or full roof replacement as needed.