Stair-step cracks in the brick and doors that stick: is it the foundation, and what now

The cracks you noticed and what they are telling you

You probably noticed one thing first. A diagonal crack in the drywall above a door frame. A bedroom door that latches in winter and will not in August. A line through the brick that steps up along the mortar joints. Then you started looking and found more.

I evaluate foundations for a living, and I will tell you up front that a good share of what I see is cosmetic or seasonal. Houses in North Texas move a little every year. The question is not whether your house has moved but whether it is still moving, how far, and in which direction. That is what an evaluation answers, and it is why I do not give opinions over the phone from a photo of a crack.

What should make you pay closer attention: cracks in brick wider than a quarter inch, cracks that are growing, several signs clustering on one side of the house, and floors you can feel sloping as you walk. Those are the patterns that usually mean the slab has settled unevenly rather than just flexed.

• Stair-step cracks in brick, especially wider than a quarter inch
• Cracks running diagonally from the corners of doors and windows
• Doors and windows that stick or swing on their own
• Floors that slope, or gaps at baseboards and crown molding
• Exterior trim, fascia or brick ledges separating from the wall
• Nail pops, cracked slab edges and cabinets pulling away from walls

Why North Texas soil does this to houses

Much of Dallas–Fort Worth sits on Blackland Prairie clay. It swells when it gets wet and shrinks when it dries, and it does so unevenly around a house. A long dry summer pulls moisture out of the soil at the perimeter while the center of the slab stays damp. The edges drop, the middle holds, and the slab bends. Then a wet fall puts the moisture back and the house lifts again. Years of that cycle fatigue the structure, and the weakest points, which are the corners of openings, show it first.

The soil does not act alone. Anything that changes moisture on one side of the house makes it worse. Gutters that dump at the corner. Grading that slopes toward the slab. A large tree that drinks from one side of the foundation all summer. Beds that get watered daily on the front but not the back. And the one homeowners rarely suspect: a leaking drain line under the slab that keeps one area permanently wet. When I see a heave, which is a section pushed up rather than dropped, an under-slab leak is the first thing I want to rule out.

• Expansive clay that swells wet and shrinks dry
• Drought followed by heavy rain, which is a normal North Texas year
• Poor drainage, ponding water and downspouts that end at the foundation
• Large trees drawing moisture from one side
• Under-slab plumbing leaks that keep soil saturated
• Grading that sends runoff toward the house

A half-hour inspection you can do yourself

Before you call anyone, walk the house and write down what you find. Start outside at one corner and go all the way around. Note every crack in the brick or siding, mark its ends with a pencil, and photograph it with a coin for scale. Look at where each downspout ends and where water would go in a storm. Check whether the soil along the foundation slopes away from the house or toward it, and whether there is a gap between the soil and the slab edge, which tells you the clay has pulled back from drying.

Inside, open and close every door and window and note which ones bind. Look at the tops of door frames for diagonal cracks. Set a marble or a small ball on hard floors in a few rooms and watch where it rolls. None of this replaces an elevation survey, but it gives you a baseline, and it is the most useful thing you can hand an evaluator.

• Mark the ends of cracks with a pencil and date them
• Photograph each crack with a coin for scale
• Trace where every downspout and roof valley sends water
• Check the grade along the foundation and gaps between soil and slab
• Note which doors and windows bind and in which season
• Check your water bill for an unexplained rise, a hint of a slab leak

When it is fine to wait a season, and when it is not

If the cracks are hairline, they open in late summer and close by winter, and nothing else is wrong, waiting and watching is a reasonable choice. Fix the drainage first; a lot of seasonal movement calms down once water is managed. If the cracks are growing between your checks, if several signs are concentrated in one area, if a floor slope is noticeable, or if you suspect a plumbing leak, do not wait. Settlement that continues gets more expensive to correct, and a slab leak is doing damage every day it runs.

A sale or purchase changes the timeline too. An inspection report that flags the foundation needs a real answer quickly, and a written evaluation from a structural analyst is what buyers, sellers and lenders can act on. We offer that evaluation free, without obligation, across Dallas and the surrounding counties, and we put in writing when no repair is needed.

What a proper evaluation looks like, and how we repair a settled slab

A real evaluation starts with an elevation survey. I take readings across the floor of the house to map which areas are high, which are low and by how much. That map, together with the crack patterns and the drainage conditions outside, tells me what the slab is doing and why. I explain it in plain terms, and if the answer is that the movement is minor or that drainage alone will fix it, that is what I say. If repair is warranted, you get a written, itemized plan on the spot or within 24 hours, including financing options.

Repair means installing piers under the settled portions of the slab and lifting it back toward level. We use several pier types and pick based on soil and load. Pressed concrete piers are pre-cast cylinders driven under the home's own weight and suit typical slab settlement. Steel push piers are driven to load-bearing strata and suit heavier structures or deep, unstable clay. Drilled concrete and bell-bottom piers are poured in place for higher loads or maximum bearing, and a hybrid system combines steel and concrete where soil conditions vary across the footprint.

The work itself is done by our in-house crew, usually within days of approval. We excavate at each pier location, install the piers, lift the slab in small controlled increments while watching the elevations, then backfill, clean up and re-measure to verify the result. You receive the final elevations and the warranty documentation, which is a lifetime transferable warranty that passes to the next owner of the home.

• Elevation survey and diagnosis of the cause
• Written, itemized estimate with financing options
• Pier type chosen for the soil and load: pressed concrete, steel, drilled, bell-bottom or hybrid
• Controlled lift with elevations checked as the slab comes up
• Backfill, cleanup and re-measurement to confirm the fix
• Lifetime transferable warranty documentation

What the repair costs and what changes the number

Our published ranges give you a realistic frame. A typical home repair here runs roughly $3,300 to $8,500, with an average project around $5,200. Per pier, the range is about $1,000 to $3,500 depending on the method and depth. A severe full-perimeter lift on a large home can reach $15,000 to $30,000 or more. The inspection and the written estimate are free, so the number you get from us is specific to your house, not a range.

Four things drive the cost. The pier count, which depends on how much of the perimeter or interior has settled. The pier method and depth, since steel driven to bedrock costs more than pressed concrete. Access, because piers under a patio, a driveway or an interior room take more work than piers along an open side yard. And scope: whether drainage correction, crawl-space work or an under-slab plumbing repair needs to happen alongside the lift. One insurance note from our experience: standard Texas homeowner policies usually exclude settlement from clay soil, while damage caused by a plumbing leak may be covered under a specific endorsement. It is worth a call to your agent before you assume either way.

How to pick a foundation company you will not regret

Get more than one evaluation, and compare the pier counts, not just the totals. If one company proposes twelve piers and another proposes twenty-six for the same house, ask both to show you the elevation readings that justify the number. A company that will not show you its elevations is asking you to trust a guess.

Read the warranty carefully. Lifetime should mean the life of the structure, and transferable should mean it follows the home to the next owner without a fee or a re-inspection trap. And ask the question that matters most: will you tell me if I do not need a repair?

• Elevation readings you can see, not just a sketch
• Pier count explained against those readings
• In-house crews, not a subcontractor you never meet
• A written lifetime warranty that transfers with the house
• NFRA membership and certified evaluators
• A plan for the cause, whether drainage or plumbing, not only the symptom

Errors I see homeowners make, in order of how much they cost

The most expensive mistake is lifting a slab without fixing what moved it. If a leaking drain line or a downspout at the corner caused the settlement, the piers hold their spots but the soil around them keeps changing, and new problems show up a few feet away. Cause first, then repair. The second mistake is choosing on price alone and ending up with too few piers in the wrong places, which produces a partial lift and a house that still has cracks.

A smaller but common one is cosmetic patching before the diagnosis. Filling cracks and repainting erases the evidence I need to read the movement. Leave the cracks until after the evaluation. And finally, the mistake of waiting through a sale: sellers who ignore a known foundation issue usually end up negotiating a bigger concession than the repair would have cost, and buyers who skip an independent evaluation inherit the problem.

What happens when you ask us to come out

You tell us what you have noticed, how old the house is and whether there is a deadline such as a closing. We schedule a visit, and I come to the property myself. I take the elevation survey, inspect inside and out, and talk you through what the readings mean. If no repair is needed, I say so and put it in writing. If repair is warranted, you receive the itemized estimate on the spot or within 24 hours, with financing options if you want them.

If you proceed, our crew is scheduled, typically within days. The work is done, the site is backfilled and cleaned, the elevations are re-measured and documented, and your lifetime transferable warranty is issued. If drainage or an under-slab plumbing problem contributed to the movement, we handle that too, with licensed plumbers on staff, so the cause is corrected along with the foundation. We have worked across Dallas–Fort Worth for more than 25 years, and we would rather be the company that told you the truth than the one that sold you piers you did not need.

Questions people ask me