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Symptoms, sorted honestly

Signs of foundation problems — and which ones actually matter.

Every house in Central Texas shows some of these. The skill is sorting them into three buckets: watch, manage, and measure. Here's the same framework we use in the field.

SIGNWHAT IT LOOKS LIKEHOW URGENT
Stair-step brick cracksDiagonal cracking that follows the mortar joints like a staircase, usually near a cornerMeasure — the classic settlement signature
Doors or windows stickingOne door is weather; several racking near the same corner is geometryWatch one, measure a cluster
Sloping floorsA slope you can feel walking, or a marble that rolls the same way every timeMeasure — direction matters more than degree
Drywall cracks above doors & windowsDiagonal cracks running off the top corners of openingsWatch if hairline and stable; measure if widening
Cracks through baseboard or tileA crack that passes through trim or tracks across several tilesMeasure — the structure is moving, not the finish
Cracks in the slab itselfA visible crack in the garage floor, a bare slab, or the exposed slab edgeWatch a stable hairline; measure wide, widening, or offset
Garage floor slope changesNew separation or slope at the garage — some slope is by designWatch; measure if it changes
Water pooling at the slabStanding water near the foundation after rain, or soil pulling away in droughtManage the moisture first — many problems end here

Each sign links to its deep-dive guide. The three buckets below are the same framework, expanded. If something changed suddenly, overnight or within days, skip the buckets and start with our guide to emergency foundation help.

Watch

  • ●Hairline drywall cracks that don't grow
  • ●One door that swells in humid months
  • ●Single cracked tile or short shrinkage cracks in the garage slab
  • ●Cracks in driveways and sidewalks (not the house)

Document with dated photos. Re-check quarterly.

Manage

  • ●Symptoms that cycle with wet/dry seasons
  • ●Water pooling near the slab after rain
  • ●Soil pulling away from the foundation in drought
  • ●A downspout dumping at a corner

Fix the moisture story first — gutters, grading, soaker hose. Many 'foundation problems' end here.

Measure

  • ●Stair-step cracks in brick, widening over time
  • ●Several doors racking near the same corner
  • ●A slope you can feel walking the floor
  • ●Diagonal cracks reopening after each dry spell
  • ●Gaps opening at trim, frieze boards, or cabinets

Get the elevation survey. Not panic — numbers. It's free and it settles the question.

Check your own list

Select what you're seeing. Get the honest read.

INTERACTIVE · SYMPTOM CHECKER1 SELECTED
Stair-step cracks in brick

Mortar joints are the weakest path, so when one section of the perimeter moves relative to another, cracks climb the joints in a stair-step pattern. This is one of the clearer outward signs of differential movement — worth measuring.

A free inspection makes sense

This combination is consistent with early foundation movement — but it isn't proof. An elevation survey tells us in about an hour whether your slab is actually out of level and by how much. If it's stable, you'll hear exactly that.

Want the deeper guides? Read how to tell if cracks are serious, cracks in the slab itself, why houses sink here, why drought does the damage, or estimate scope with the repair calculator.

The picture guide · Real inspections, not stock photos

Early signs of foundation problems, in pictures.

Every photo below comes from a real Central Texas job or inspection. Each caption tells you what you're looking at, where it shows up on a house, and the mechanics behind it, so you can walk your own walls with the same eyes we bring.

Stair-step crack descending through a tan brick wall, a classic exterior symptom of foundation settlement
What: a crack climbing the mortar joints like a staircase. Where: exterior brick, usually near a corner. Why: one section of the foundation dropped relative to another, and the wall tears along its weakest path.
Diagonal drywall crack spreading from a bedroom window corner, a common interior sign of foundation settlement
What: a diagonal drywall crack running off the corner of an opening. Where: top corners of windows and doors, the weakest points in a wall. Why: the foundation is deflecting and the stress concentrates at the opening.
Ceiling pulling away from the wall above a doorbell chime as the home's foundation settles
What: the wall pulling away from the ceiling. Where: the top of interior walls, often near the settling side. Why: differential settlement is racking the frame; this one earns a measurement promptly.
Vertical crack running through baseboard trim with a gap at the tile floor below, from slab movement
What: a crack that keeps going through the baseboard, with a gap opening at the floor. Where: interior walls over a settling slab edge. Why: the structure itself is moving, not just the paint or the drywall finish.
Stair-step and vertical cracks in red brick veneer beneath a window, with the foundation exposed for repair
What: brick cracking below a window sill. Where: the veneer between sill and slab edge. Why: the foundation under the window settled and the panel above followed it down.
Gap opening at the top corner of an interior door frame as the wall racks out of square with foundation movement
What: a door frame racked out of square, with a gap at the top corner. Where: doors near the settling corner of the house. Why: the slab dropped on one side of the opening and the frame twisted with it, which is why the door rubs or quits latching.
Soil shrunk back from a brick home's foundation, exposing the slab edge during a dry Central Texas summer
What: soil shrunk back from the house, exposing the slab edge. Where: the perimeter, worst on sun-baked south and west walls in late summer. Why: drying clay pulls away and takes the slab edge's support with it, and runoff erosion widens the gap.
Baseboard separating from a sloping floor at a room corner as the slab settles beneath it
What: the baseboard separating from a floor that slopes toward the corner. Where: room corners over a settled section. Why: the slab tilted down while the wall stayed put, so the trim line opened up.

The other half of honest

Signs that usually are NOT foundation problems.

Half the calls we get are one of these. They look alarming and they're almost always finish or curing behavior, not the foundation. Here's each one straight, with the exception that would change the answer. The deeper method for sorting them lives in how to tell if foundation cracks are serious. Corner pop, the most alarming-looking of the bunch, has a full explainer in what is corner pop. Nail pops, the most common false alarm of all, get their own honest treatment in are nail pops a sign of foundation problems.

Nail pops

Round bumps or small crescents where a drywall nail backed out as the lumber behind it dried. The wood moved, not the slab.

When it does matter: They arrive in a cluster alongside diagonal cracks and racking doors near one corner.

Ceiling hairlines

Straight hairline cracks tracking drywall seams or texture, from humidity swings and normal truss movement overhead.

When it does matter: The crack leaves the seam, keeps widening, or pairs with wall cracks below it.

Hairline slab surface cracks

Thin surface cracks in a garage floor or bare slab. Concrete shrinks as it cures; nearly every slab has them.

When it does matter: Width past about 1/8 inch, one face sitting higher than the other, or growth across seasons.

Expansion-joint cracks

Cracks following the straight lines tooled or cut into driveways, sidewalks, and patios. The joint is doing exactly its designed job.

When it does matter: The two sides sit at different heights, or the crack leaves the joint and wanders.

Garage lintel corner cracks

Short diagonals at the top corners of the garage opening, where the steel lintel over the door flexes with temperature and rusts over the years.

When it does matter: They keep widening, brick above them shifts, or the lintel visibly sags.

Corner pop

A chipped triangle of concrete at an outside corner of the slab, where slab and brick expand at different rates. Cosmetic in almost every case.

When it does matter: Exposed rebar rusting in the break, or cracking that continues up into the wall above.

Seasonal door sticking

One door that rubs in humid months and frees up in fall. That's the wood swelling, not the foundation moving.

When it does matter: Several doors racking near the same corner, or a door that quits latching and stays that way through the seasons.

The pattern behind all seven: materials move for their own reasons, and a finish symptom becomes a foundation symptom only when it travels with company near one corner and worsens across seasons. Doors get their own guide in why doors stick when foundations move, slab cracks in cracks in the foundation slab, and garage floors in garage floor slope vs foundation movement. Still unsure which list yours belongs on? That's precisely what the free elevation survey answers.

Straight answers

Warning-sign questions, answered straight.

The Texas-specific tell is the calendar: expansive clay swells in wet springs and shrinks through late summer, so symptoms — stair-step brick cracks, doors sticking near one corner, diagonal drywall cracks above openings, sloping floors — often appear or worsen after a hot, dry stretch. Any one sign is a question; several clustered near one corner and worsening across seasons is a pattern worth measuring.
Same signs as the rest of Central Texas, sorted by the city's soil patchwork: deep clay pockets move more than the shallow-limestone north side. In practice we see stair-step cracks in brick veneer, doors that quit latching after a drought, and slab-edge separation — and about half the time the elevation survey says monitor, not repair.
Slowly, almost always — months and seasons, not days. The exception is an active plumbing leak, which can move a slab in weeks. That pace is your friend: you have time to measure, compare bids, and decide calmly. Anyone pressuring you to sign today is selling urgency, not engineering.
Yes — and we'll show you how. Pencil-mark crack ends with dates, photograph quarterly, note which doors rub and when. Pair that with a free baseline elevation survey and your monitoring actually means something.
Combination and trajectory: several symptoms clustered near one corner, getting worse across seasons. Any single sign alone — even an ugly crack — is usually just a question. A converging pattern is an answer forming.

Stop wondering. Start measuring.

The free elevation survey sorts watch from measure in about an hour — and about half the time, the verdict is relax.

Now booking free inspections in Central Texas.

Call (210) 816-0034Free Inspection