Roofs in Cobb County, Georgia: home ages, storms and what to plan for
Cobb County, Georgia has about 311,556 homes. Most were built in the 1980s, which tells you a lot about where its roofs are in their life: about 71% of homes would be on at least their second roof by now.
When homes here were built
66% of homes are single-family detached houses and 67% of occupied homes are owner-occupied; the median owner-occupied home value is about $373,700.
Most homes here are old enough to be on a second or even third roof. That changes what matters at replacement time: decking that has been nailed through twice, flashing that may have been reused before, and attic ventilation that was never brought up to current practice. See roof decking and ventilation basics.
Storm exposure
Since October 14, 2020, radar estimates and National Weather Service reports show hail of three quarters of an inch or more on 13 days here, 8 of them at an inch or more. The largest estimate was 2.00 in on April 10, 2025, and the most recent was September 5, 2026. Hail this frequent is a good reason to look at impact-resistant shingles at replacement time: Class 4 shingles in Georgia.
Full storm history: 30008 · 30060 · 30062 · 30064 · 30066 · 30067 · 30068 · 30080 on the North Georgia Hail Map.
Cities: Acworth, Austell, Clarkdale, Kennesaw, Mableton, Marietta, Powder Springs, Smyrna.