Roofs in Kennesaw, GA: home ages, storms and what to plan for

In Kennesaw, GA, about 61% of homes were built long enough ago that their original roofs would already be due, and the biggest group of houses dates to the 1990s.

When homes here were built

Share of homes by decade built (Census ACS 2023 5-year). Clay bars: built long enough ago that the original roof would be at or past a typical asphalt shingle lifespan in Georgia.

67% of homes are single-family detached houses and 69% of occupied homes are owner-occupied.

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 9 days here, 3 of them at an inch or more. The largest estimate was 1.75 in on September 12, 2023, and the most recent was July 3, 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: 30144 · 30152 on the North Georgia Hail Map.

Zip codes: 30144, 30152.

Questions homeowners ask

• How do you calculate roof pitch to angle and angle to pitch?
• How many years until a roof needs replacing, and how many does yours have left?
• How do you read a roof pitch diagram chart?
• When should you use roof underlayment?
• What is the standard roof pitch?

Housing data: U.S. Census Bureau, American Community Survey 2023 5-year estimates. Lifespan estimate assumes a typical asphalt shingle roof lasts about 20 to 25 years in Georgia; actual roofs may have been replaced earlier after storms. Hail: NOAA MRMS radar estimates and NWS reports.