Foundation Shifting in Texas: Causes, Warning Signs & What to Do

If you own a home in North Texas long enough, you'll probably hear a neighbor mention "foundation issues." It's one of those topics that makes homeowners nervous, partly because the signs are easy to miss and partly because nobody wants to hear the word "structural." The good news: understanding why foundations move here, and what to watch for, puts you in a much better position to catch problems early and keep small issues small.

Why DFW foundations move

Foundation movement in our area isn't usually about bad construction. It's mostly about what the house is sitting on and how water behaves around it.

• Expansive clay soil. Much of the DFW area sits on clay that swells when it absorbs water and shrinks as it dries. After a wet spring the ground pushes up; during a long, hot summer it pulls back and can crack open. A house sitting on that soil gets nudged around season after season.
• Slab-on-grade construction. Many homes around Irving and the rest of the metroplex are built on concrete slabs poured directly on the ground. Slabs are practical and common, but they're in direct contact with that moving soil, so when one side dries out faster than another, the slab can settle or lift unevenly.
• Poor drainage. Gutters that dump water right at the foundation, flower beds that slope toward the house, and low spots that hold puddles all concentrate moisture in one area. Uneven moisture means uneven soil movement.
• Tree roots. Large trees planted close to the house pull a lot of water out of the soil, especially in summer. That can dry out the ground under one corner of the slab while the rest stays put.
• Plumbing leaks under the slab. A slow leak in a supply or drain line beneath the house can saturate the soil in one spot for months before anyone notices, causing localized swelling or washing soil away.

Notice the common thread: inconsistent moisture. The soil itself isn't the enemy. Big swings between soaked and bone-dry are what cause trouble.

Warning signs inside the house

Foundation movement often shows up first in the parts of the house that are supposed to be square and straight.

• Diagonal drywall cracks running from the corners of doors and windows. Those corners are stress points, so they're where movement tends to show first. (We go deeper on this in our guide to fixing drywall cracks from foundation movement.)
• Doors and windows that stick, won't latch, or swing open or closed on their own, especially if they used to work fine.
• Gaps at trim and ceilings, such as baseboards pulling away from the wall, crown molding separating at corners, or a visible gap where the wall meets the ceiling.
• Uneven or sloping floors, where a marble rolls one direction or tile starts cracking in a line.

Warning signs outside

• Stair-step cracks in brick that follow the mortar joints in a zigzag pattern.
• Gaps around exterior doors, where you can see daylight around the frame or the weatherstripping no longer seals.
• Separation around the garage, such as a gap between the garage door and the slab on one side, or brick pulling away near the garage opening.
• Soil pulling away from the slab during dry weather, leaving a visible gap along the foundation edge.

One sign on its own isn't cause for panic. Houses move a little, and some cracking is normal. What matters is a pattern: several signs at once, or signs that are getting worse over weeks and months.

What homeowners can do

You can't change the soil under your house, but you can do a lot to keep moisture around it steady.

• Keep soil moisture consistent during dry spells. A common North Texas practice is running a soaker hose a short distance out from the slab during long droughts so the soil doesn't shrink away from the foundation. Follow local guidance on how much and how often, respect your city's current watering rules, and don't overdo it, since soggy soil causes problems too.
• Get roof water away from the house. Keep gutters clear and add downspout extensions or splash blocks so water lands several feet from the foundation instead of right at it.
• Grade the soil so water drains away. The ground right next to your house should slope gently away from it. Over the years, beds settle and mulch builds up, and the slope can end up pointing the wrong way.
• Watch the trees near the house. Keep an eye on large trees close to the foundation. An arborist can advise on whether a tree is a concern and what your options are.
• Watch for slab leaks. An unexplained jump in your water bill, the sound of running water when everything is off, warm spots on the floor, or a damp area that never dries are all worth a call to a licensed plumber.

When to call a structural engineer or foundation company

Some situations call for a professional evaluation, not a handyman and not a guess:

• Cracks that are clearly widening over time, or that reopen after being repaired.
• Doors that suddenly won't close or latch, particularly several at once.
• Floors that noticeably slope or feel different than they used to.
• Cracks that have grown past a hairline and keep growing, in drywall, brick, or the slab itself.

A structural engineer works for you, not for a repair company, and can give you an independent read on whether you're looking at normal seasonal movement or something that needs repair. If repair is needed, a foundation repair company handles the actual structural work.

Where H2G fits in (and where we don't)

Let's be straightforward: H2G does not do foundation repair. We're not engineers, and we won't pretend to diagnose structural problems. What we do handle is the work around the foundation, both the prevention side and the cleanup side:

• Regrading soil and installing sod so rainwater flows away from your slab instead of pooling against it. See our sod installation and landscaping service, and our guide to sod types for Texas yards if you're choosing grass.
• General drainage improvements around the yard, like extending downspouts and correcting low spots near the house.
• Adjusting sticking doors so they close and latch properly again.
• Re-caulking gaps at trim, windows, and exterior doors.
• Repairing drywall cracks once the movement has been addressed, so the repair actually lasts. You'll find these smaller jobs under our miscellaneous handyman services.

Quick answers

Why do so many North Texas homes have foundation movement? Expansive clay soil swells when wet and shrinks when dry, and many homes sit on slabs that move with it.

Is every drywall crack a foundation problem? No. Fine hairline cracks are common. Cracks that widen, reopen, or come with sticking doors and sloping floors are the ones to have checked.

Does H2G repair foundations? No. Call a structural engineer or foundation repair company for that. We handle grading, sod, doors, caulking, and drywall repair around it.

Should I water my foundation in a drought? Keeping soil moisture consistent is common practice here. Follow local guidance and your city's watering rules.