Foundation Crack Repair in Arlington, TX: What It Costs

Cosmetic cracks versus structural cracks

Hairline cracks under about 1/16 inch wide that run straight and don't change width along their length, especially in garage floors or interior slab areas away from load-bearing walls, are usually shrinkage cracks from the concrete curing process and aren't a structural concern. These are extremely common in Arlington and don't necessarily indicate foundation movement.

Cracks worth taking seriously include diagonal stair-step cracks in brick veneer, cracks wider than 1/4 inch, cracks that are visibly wider at one end than the other, and any crack accompanied by doors or windows that have started sticking, gaps appearing between baseboards and the floor, or a visibly uneven floor. These patterns point toward differential settlement, which is common where Arlington's expansive clay has dried unevenly around the slab perimeter.

If you're unsure which category your crack falls into, a foundation inspection, often free from local repair companies, can measure the crack and check floor elevations to determine whether it's cosmetic or tied to actual slab movement.

Why Arlington slabs crack: clay shrink-swell cycles

Eagle Ford and Woodbine shale-derived clay under much of Arlington expands significantly when saturated and shrinks hard during dry periods, and this shrink-swell cycle is the primary cause of differential settlement cracking in the area. Unlike frost-driven cracking in colder climates, Arlington's cracking pattern tracks rainfall and drought cycles, which is why cracks often appear or widen noticeably in late summer after weeks of hot, dry weather.

Trees and large shrubs planted close to the foundation make this worse, since their root systems pull additional moisture out of the clay during dry spells, accelerating shrinkage right where the roots are concentrated. This is a common cause of localized cracking on one side of a house in older Arlington neighborhoods with mature landscaping, like parts of Central Arlington and areas near Lake Arlington.

Crack injection: how it works and what it costs

For cracks confirmed to be cosmetic or stable, without ongoing structural movement, crack injection using polyurethane or epoxy resin seals the crack and can help prevent water intrusion and pest entry. This typically costs $400 to $850 per crack in the Arlington area, depending on crack length and accessibility.

Epoxy injection is generally used for structural, load-bearing cracks that need rigid bonding strength, while polyurethane injection is more common for cracks where some flexibility is useful, such as areas that may see minor ongoing movement or water infiltration. Ask which resin your contractor is proposing and why, since the two serve different purposes.

When cracks mean you need piers instead

If a crack is tied to measurable slab settlement rather than surface shrinkage, injecting the crack alone won't stop it from reopening, since the underlying movement continues. In these cases, a Texas-licensed engineer's evaluation will typically recommend piers, whether pressed concrete pilings or steel push piers, placed to stabilize the settling section of slab before any cosmetic crack repair is done.

This is why it's worth getting an engineer's evaluation before paying for crack injection on anything beyond a clearly minor, stable hairline crack, since sealing a crack that's still actively widening due to ongoing settlement is a short-term fix that will likely need to be redone.

Preventing new cracks between repairs

A consistent foundation watering routine through Arlington's hot summer months, keeping soil moisture around the slab perimeter more stable, is one of the most effective and low-cost ways to reduce new shrink-swell cracking. Soaker hose systems for this purpose typically cost $300 to $900 to install.

Keeping large trees and shrubs at a reasonable distance from the foundation, or installing a root barrier where mature trees are already close, can also reduce localized crack formation. Root barrier installation in Arlington generally runs $800 to $2,500 depending on the length needed.

Getting a crack evaluated in Arlington

If you're seeing new or widening cracks, start with a free inspection from a local foundation company, and ask specifically whether they're recommending crack injection alone or piers as well, and why. You can get matched with vetted foundation repair companies serving Arlington by entering your ZIP code. For broader cost ranges and permit details on pier work, see our full Arlington foundation repair guide.

Typical cost ranges

Ranges are general estimates gathered from homeowner-reported quotes, not an offer or a quote for your project.

Common questions

More on this market

Local cost ranges, seasons, permits and licensing for this city live on the market page.

Sources

• Texas Board of Professional Engineers and Land Surveyors
• City of Arlington Building Inspections
• USGS geologic mapping program, North Texas expansive clay formations

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