Flashing, pipe boots, vent penetrations, and valleys are common places where Marietta roofs leak

https://manueldczd435.moderncairn.com/posts/roof-repair-or-replacement-in-marietta-how-to-decide-2

Flashing, pipe boots, vent penetrations, and valleys are common places where Marietta roofs leak, especially during wind-driven rain, making proper sealing and inspection important after storms.