Warning Signs
The short answer
The clearest signs of foundation problems are stair-step cracks in exterior brick, doors and windows that stick or won't latch, sloping or uneven floors, gaps opening around door frames and windows, and cracks where walls meet ceilings. One sign alone may be harmless; several together signal active movement worth a professional inspection.
No single crack means your foundation is failing — and no foundation in Central Texas is perfectly still. The signal isn’t any one symptom; it’s a pattern of them, getting worse over time. Use the checklist below, and if several boxes are ticked, get an elevation survey before the movement compounds.
If you’re seeing several of these, the next step is a measured inspection. (Not sure if what you’re noticing is even a real sign yet? See what counts as normal house settling first.)
Most homeowners over-worry the cosmetic stuff and under-worry the real tells. The dividing line is whether a crack reflects the structure moving or just the finish aging. Here’s the quick triage:
| Sign | Usually cosmetic | Worth a pro’s eyes |
|---|---|---|
| Drywall or paint cracks | Thin, vertical, stable | Wider than 1/4”, diagonal from a corner, or growing |
| Brick cracks | A single thin vertical line | Stair-step cracks following the mortar joints |
| Floors | Surface crazing in a slab | A floor that slopes or bounces, or a hump |
| Doors | One wood door sticking in summer humidity | Several doors out of square at once, year-round |
| Trim and corners | A small caulk gap | Corner pop plus separation along a whole wall |
The pattern that matters: several signs appearing together, on the same side of the house, and worsening across a wet-then-dry season. That points to active foundation movement, not a settling new build. A licensed engineer’s elevation survey is the only way to confirm it — and to rule it out.
Most of these symptoms trace back to one cause: the expansive clay soil under much of Central Texas east of I-35. The Blackland Prairie’s montmorillonite clay — which the USDA classifies as having high shrink-swell potential — swells when it gets wet and shrinks when it dries, lifting and dropping the foundation as the seasons cycle. That seasonal heave-and-settle is why a door that latched fine in May binds in a dry August, and why these signs tend to come and go before they get permanently worse. See what actually causes foundation problems here for the full mechanism.
If several of these signs match your home, the next step is a measured inspection. We’ll connect you with a vetted specialist for a free on-site check — and you can read what a repair typically costs first.
The most common signs are stair-step cracks in exterior brick, doors and windows that stick or won't latch, sloping or bouncy floors, gaps opening around window and door frames, and separation where walls meet the ceiling. In Central Texas these tend to show up seasonally as expansive clay swells in wet weather and shrinks in drought, racking the structure above it.
Worry about horizontal cracks, stair-step cracks in brick or mortar, cracks wider than about 1/4 inch, and any crack that's actively growing. Thin vertical hairline cracks are usually cosmetic. When in doubt, a quick professional inspection settles it.
They can be. Texas humidity swells doors seasonally, which is harmless. But if a door suddenly won't latch, the frame looks out of square, or several doors stick at once, that often reflects the foundation shifting beneath the walls.
Active movement usually does, because the cause — expansive clay swelling and shrinking with moisture — keeps cycling every wet-to-dry season in Central Texas. Damage rarely reverses on its own. Catching it early, when you have hairline cracks instead of a 1-inch floor drop, is what keeps a repair in the low thousands instead of five figures.
Tell us what you’re seeing and we’ll connect you with one trusted local specialist for a free inspection — no pressure, no spam, no reselling your info.