Foundation Cracks in Texas: When to Worry

Short answer: Most foundation cracks in Texas are not dangerous. Hairline cracks 1/8 inch or narrower usually don't mean the foundation is failing [2]. Worry when a crack is wider than 1/4 inch, keeps growing, runs sideways, or shows up with sticking doors or sloping floors [4][6].

Texas clay soil swells when wet and shrinks when dry, so cracks in slabs are common [6]. Engineers in the Texas section of the American Society of Civil Engineers say most cracks do not weaken a foundation [1]. The job is to tell the harmless ones from the ones that are moving. If a crack does turn out to be structural, see our Texas foundation repair cost guide for per-pier prices, or get a free quote from local Texas pros.

What to do now (checklist)

1. Measure it. Use a ruler or a crack gauge and write the width and date in pencil next to the crack.
2. Photograph it with a ruler in the frame, then re-check every few weeks. A crack that is getting wider matters more than its size on day one [4][6].
3. Look for other signs. Walk the house for sticking doors and windows, gaps where walls meet ceilings or floors, cracked floor tile, and brick cracks [1][4].
4. Check the shape. Movement tends to make a few large cracks, at least 1/16 inch wide, that are tapered and often run the full height of brick walls [2].
5. Check the water. Keep soil moisture fairly even on all sides of the house; Texas engineers say that may help [1]. Point downspouts away from the slab.
6. Watch for a leak. Warm spots on the floor, a running meter with everything off, or a jump in the water bill can point to a slab leak. See our slab leak repair cost guide.

Warning signs: monitor or call?

What it costs to find out

An engineer's report from someone who doesn't sell repairs gives you a plan to compare bids against [4]. If the crack is only in drywall, our drywall crack repair guide covers patch costs and when it points to the slab. In Houston, see foundation repair cost in Houston.

When to call a pro

• A crack is growing over weeks, or new cracks keep showing up [4][6].
• Doors or windows suddenly stick, or floors feel sloped [1][4].
• Brick walls show tapered or stair-step cracks [2][4].
• You are buying or selling the house and need a written opinion [3].

Standard Texas homeowners insurance generally does not cover foundation damage from soil movement or settling [4]. When you're ready, get a free quote from local Texas pros.

FAQ

What size foundation crack should worry me?

Cracks 1/8 inch or narrower usually don't mean the foundation is failing [2]. Cracks wider than 1/4 inch, cracks that grow, and horizontal cracks are the ones to have an engineer check [4][6].

Are foundation cracks normal in Texas?

Yes. Expansive clay soil moves with wet and dry seasons, so most Texas slabs have some cracking, and most cracks don't weaken the foundation [1][6].

Who should I call first, an engineer or a repair company?

Many homeowners start with a structural engineer who doesn't sell repairs. In Houston a foundation inspection runs about $400 to $1,000 [3][4], and the report gives you a plan to compare repair bids against.

Does homeowners insurance cover foundation cracks in Texas?

Usually not when the cause is soil movement or settling. Damage from a sudden covered event, like a burst pipe under the slab, may be covered [4].

Sources

1. ASCE Texas Section, Guidelines for the Evaluation and Repair of Residential Foundations, Version 3 (adopted April 2022)
2. R. Michael Gray, P.E. and Matthew T. Gray, Buyer's Guide to Slab-on-Ground Foundations
3. Angi, How Much Does a Structural Engineer Cost in Houston, TX? (updated Jul 8, 2026)
4. HomeResponsePro, Foundation Repair Cost in Houston (2026 Guide, Feb 28, 2026)
5. Angi, How Much Does Foundation Repair Cost in Houston, TX? (2026 data)
6. Tristar Built, Foundation Cracks in North Texas: When to Worry