Cracks in Atlanta Brick, Block and Drywall: Which Ones Matter
Most houses crack a little. Foundation crack repair is about telling the harmless hairline from the crack that is reporting movement underneath, and fixing the cause before you patch the line.
Sealing or injecting a single foundation crack typically costs $200–$1,000 (Fixr, 2026), and This Old House lists crack filling at $250–$800. If the crack keeps widening because a corner is settling, the repair is under the footing instead: a pier runs $1,000–$3,000 each, and that changes the whole job.
Reading the crack
- Hairline cracks in a poured wall or slab, straight and even width: usually shrinkage from curing. Seal them if they let water in.
- Stair-step cracks in brick veneer or block, following the mortar: either settlement at one end of the wall or long-term movement in the veneer. Check whether doors nearby have started to stick.
- Diagonal cracks from a window or door corner, wider at the top: the corner below is often dropping.
- Horizontal cracks in a basement wall partway up: soil pushing from outside, more common on the uphill wall of a house cut into a slope.
- Drywall cracks over doors and along ceiling seams: framing movement, sometimes from the floor below rather than the foundation.
What does foundation crack repair involve?
Injection fills a crack in poured concrete from the inside face. Epoxy bonds the two sides; polyurethane foam stays flexible and stops seepage. Repointing replaces cracked mortar in brick or block. Neither stops movement. If the crack is reporting settlement, the specialist should explain what is moving and why, and the real repair may be piering or leveling the settling corner, with the crack sealed afterward.
Why so many Atlanta walls crack
Age is part of it. About 43% of Atlanta's homes were built before 1980 and roughly 12% before 1940 (U.S. Census ACS 2020–2024), and older brick and block have had decades to respond to small shifts. Water is the other part. Hartsfield airport averages 50.43 inches of precipitation a year, spread across every month (NOAA 1991–2020 normals), so soil beside a footing that takes roof runoff rarely gets a long dry spell. A downspout emptying at a corner is one of the most common partners of a corner crack.
Measure it before anyone comes out
Mark both ends of each crack in pencil with the date, and photograph it beside a ruler after heavy rain and again a few weeks later. Note which doors stick and when. A specialist can read movement far better from a dated record than from one visit. Typical prices for each method are in the 2026 foundation repair price table.
Questions homeowners ask
Can I seal a foundation crack myself?
A dry hairline crack in poured concrete can be sealed with a store-bought kit. A crack that leaks, keeps widening, steps through brick, or comes with sticking doors needs its cause found first; sealing over active movement only hides the record.
Tell us what the house is doing
A sentence is enough: where the crack is, which floor dips, or what you saw under the house. One independent specialist who works on Atlanta foundations and crawl spaces will phone you to talk it through and, if it helps, arrange a visit.