Texas has a lot of expansive clay. When it dries, it shrinks; when it’s wet again, it swells. That back-and-forth moves your foundation and shows up as cracked walls, sticky doors, and uneven floors—especially if you’re not controlling moisture around the slab. 

Local guidance for Texas homeowners even recommends foundation watering during extended dry spells to keep soil moisture more consistent. 

Why this happens (quick facts)

1) Shrink–swell clays move with moisture.
Expansive Texas clays absorb water and swell; when they dry, they shrink. That volume change lifts or drops parts of the slab. Because movement is rarely uniform, walls crack at corners and openings (weak points), and door frames rack just enough that latches stick or won’t align.

2) Dry summers followed by hard rains create big swings.
Long hot spells dry the perimeter soil so it contracts and pulls away from the foundation. A heavy storm then re-wets that same edge, making it swell quickly while interior soils change more slowly. The uneven rise and fall (edge vs. interior) causes differential movement you see as diagonal drywall cracks and seasonal door misalignment.

3) Poor drainage makes the movement worse.
If water drops at the base of the wall—short downspouts, flat or negative grade, mulched beds that trap runoff—the soil right next to the slab stays wetter than surrounding soil. Code aims to prevent that by requiring ground to fall 6 inches in the first 10 feet (or using drains/swales). When one zone stays wet and another stays dry, the contrast increases heave here / settlement there, which cracks finishes and tweaks door frames.

Signs to watch in Texas homes

• Stair-step cracks in brick or block; interior cracks at door/window corners
• Doors that rub or won’t latch after a dry spell
• Gaps at trim or between soil and slab that widen in summer
• Floors that feel out of level (check high/low spots with a ball or level)
  Local checklists for North Texas call out these same indicators and suggest routine perimeter checks. 

What to do now (simple steps)

1) Document, then monitor.
Take clear, dated photos of each crack. Note location and approximate width. Repeat after heavy rain and after dry spells. Log the photos and notes in your TradeCrews Property Journal so you have a time-stamped history. Run a seasonal Jack Report™ to spot patterns and get suggested next steps you can share with a pro.

2) Fix drainage first.
Extend downspouts, add splash blocks, and regrade to achieve 6 in / 10 ft fall away from the house. Use drains or swales where space is tight. This is straight from the residential code. 

3) Keep soil moisture more consistent.
During prolonged drought, water low and slow around the perimeter so moisture soaks in, then pause and repeat. Texas A&M AgriLife experts recommend short, soak-in cycles to hydrate clay without flooding. 

4) Manage landscaping near the slab.
Avoid heavy irrigation against the foundation. Keep large, thirsty trees at safer distances or use root barriers if an arborist advises it. (Uneven drying near roots can increase differential movement.) 

5) Call a pro for red flags.
If cracks widen quickly, doors won’t close after weather changes, or you see >¼″ cracks or notable slope, get a licensed structural engineer or reputable foundation contractor to evaluate. (Many Texas firms recommend drainage fixes before structural work.) 

When to call immediately

• Rapidly growing cracks or new leaks after a storm
• Doors/windows suddenly out of square across several rooms
• Noticeable floor slope or separation at exterior brick lines

Need a fast gut-check? Ask a vetted expert at letsaskjack.com, then book a licensed Texas engineer or foundation contractor on TradeCrews.