Concrete Foundation Repair
When to Worry About Cracks
Concrete Steps vs. Wood Steps
Guide to Each Option
Thin, vertical hairline cracks under 1/8 inch are common and usually cosmetic. Horizontal cracks, stair-step cracks, cracks wider than 1/4 inch, or cracks paired with doors and windows that stick are warning signs of real structural movement.
Almost every homeowner who calls us about a foundation crack starts with some version of "I probably shouldn't worry about this, right?" Sometimes that's true. Sometimes it isn't. Here's how we actually tell the two apart, and what a genuinely concerning crack looks and feels like in person.
What a Normal Crack Looks and Feels Like
A cosmetic foundation crack is usually thin enough that you'd need to look closely to find it in the first place, often discovered while painting or during a routine walk-around rather than because it caused a visible problem. Run a fingernail across it and you'll barely catch an edge. It hasn't grown since you first noticed it, and nothing else in the house, no sticking doors, no new gaps at the ceiling, has changed alongside it.
What a Concerning Crack Looks and Feels Like
A crack worth worrying about tends to announce itself through more than one symptom at once. Maybe it's a crack you can slide a coin into on edge, running horizontally across a basement wall rather than up and down. Maybe it's paired with a door upstairs that used to close easily and now catches on the frame, or a hairline gap that's opened up between a wall and the ceiling trim. Individually, homeowners often write each of these off separately. Seen together, they're usually the same story: something underneath the house is moving.
The Decision Framework We Actually Use
- Thin, vertical, under 1/8 inch, no other symptoms: monitor, likely just curing shrinkage.
- Vertical crack wider than 1/4 inch, stable, no offset: worth a professional look, but not an emergency.
- Horizontal crack of any width: schedule an inspection soon. This pattern usually means soil pressure is pushing against the wall.
- Stair-step crack in a block foundation, or any crack paired with sticking doors/windows: don't wait on this one, get it evaluated.
Why Georgia Foundations Crack More Than Most
Concrete shrinks slightly as it cures, which causes some hairline cracking in nearly every foundation ever poured, even well-built ones. On top of that baseline, Atlanta's expansive clay soil adds ongoing pressure as it swells and shrinks with the seasons, and that's the piece that turns normal curing cracks into something worse over time if drainage and grading weren't handled correctly during construction.
What We Check First on a Foundation Inspection
We start outside, not at the crack itself. Where does water go when it rains near this wall? Are gutters dumping right next to the foundation? Is there a low spot in the yard pushing water toward the house? More often than not, the answer to what's causing a crack is standing six feet away from it, not inside the crack. Only after we've ruled out the obvious external causes do we move to measuring the crack pattern itself.
Common Mistakes Homeowners Make
The most common one is patching a crack cosmetically, painting over it or filling it with a generic caulk, without ever addressing why it appeared. That hides the symptom, not the cause. The second is the opposite problem: panicking over a stable, thin, purely cosmetic crack and paying for repairs that weren't needed. Both mistakes come from skipping the actual diagnostic step.
How We Approach Foundation Repairs
We don't recommend structural repair for a crack that doesn't need it, and we won't tell you a crack is "nothing to worry about" if the pattern says otherwise. If drainage is the root cause, which it often is here, fixing that alongside the crack itself is part of the recommendation, not an upsell tacked on.
