Foundation Crack Repair in Shreveport, Louisiana — When to Worry and When to Call a Professional

Finding a crack in your foundation is an unsettling experience for any Shreveport, Louisiana, homeowner. The foundation is the one part of your house you cannot easily replace, and a crack feels like a direct threat to the structural integrity of your home. The reality is more nuanced. Many foundation cracks in Shreveport are cosmetic — the result of normal concrete curing and minor soil movement that does not threaten the structure. Others are structural and demand immediate attention. Knowing the difference can save you from spending thousands of dollars on an unnecessary repair or, worse, from ignoring a crack that is actively compromising your home. Here is how to evaluate foundation cracks in Shreveport's challenging clay soil environment.

Understanding Concrete Cracking — Why Foundations Crack in the First Place

Concrete cracks. It is in the nature of the material. Concrete shrinks slightly as it cures — the chemical reaction between cement and water that gives concrete its strength also reduces its volume by a fraction of a percent. That shrinkage creates tensile stresses in the concrete, and since concrete is strong in compression but weak in tension, the result is cracking. These shrinkage cracks typically appear within the first year after the concrete is poured and are the most common type of crack found in Shreveport slab foundations and foundation walls. They are usually hairline width — less than one-sixteenth of an inch — and they are vertical or nearly vertical in orientation. These cracks are cosmetic and do not indicate a structural problem.

Structural cracks are different. They are caused by forces acting on the concrete after it has cured: soil movement, hydrostatic pressure, or excessive loading. In Shreveport, the dominant cause of structural foundation cracks is expansive clay soil that expands and contracts with moisture changes. The soil moves, the foundation moves with it, and the concrete cracks because the movement is differential — one part of the foundation moves more than another. Structural cracks are typically wider than shrinkage cracks, they may be diagonal or horizontal rather than vertical, and they often continue to grow over time as the soil movement continues.

Cosmetic vs Structural Cracks — How to Tell the Difference in Shreveport

The width of a crack is the first clue about its significance. Cracks narrower than one-sixteenth of an inch — roughly the thickness of a nickel — are almost always cosmetic. They represent normal concrete behavior and do not require repair beyond perhaps a cosmetic patch to keep water and insects out. Cracks between one-sixteenth and one-eighth of an inch wide are in a gray zone. They may be cosmetic or they may represent early-stage structural movement. Cracks wider than one-eighth of an inch almost always indicate structural movement and warrant professional evaluation. Cracks wider than one-quarter of an inch are structural and should be addressed.

The shape and direction of a crack provide additional information. Vertical cracks in a poured concrete foundation wall are usually shrinkage cracks and are rarely structural unless they are very wide or accompanied by other signs of foundation movement. Diagonal cracks — cracks that angle across the wall or slab — indicate differential movement: one part of the foundation has settled relative to another. In Shreveport, diagonal cracks in a slab foundation typically trace back to differential soil moisture beneath the slab. The soil is wetter and more swollen under one part of the slab than another, and the slab has bent and cracked to accommodate the difference.

Horizontal cracks in a foundation wall are the most concerning type. A horizontal crack indicates that the wall is bowing inward under lateral pressure from the soil outside. In Shreveport, lateral pressure typically comes from saturated clay soil pressing against the foundation wall after heavy rain. Horizontal cracks are structural by definition and require professional evaluation immediately. They will not self-correct, and the wall will continue to bow inward unless restrained by wall anchors or other lateral support systems.

Stair-step cracks in a concrete block foundation wall follow the mortar joints rather than cutting through the blocks. They indicate differential settlement and are the block wall equivalent of a diagonal crack in a poured wall. Stair-step cracks are structural and should be evaluated, particularly if they are actively widening or if they are accompanied by other signs of movement like sticking doors or sloping floors.

The Tape Test — DIY Crack Monitoring in Your Shreveport Home

If you find a crack in your Shreveport foundation and you are not sure whether it is active — still moving — or dormant — stable — you can monitor it yourself with a simple technique that costs almost nothing. The tape test, also called the crack monitor method, involves bridging the crack with a rigid marker that will show any further movement.

Clean the surface around the crack with a wire brush to remove loose concrete, paint, or dirt. Apply a strip of clear packing tape across the crack at its widest point, pressing it firmly to both sides. Mark the date on the tape with a permanent marker. If the crack is active and continues to widen, the tape will either stretch, tear, or pull away from one side. Check the tape every month for six months, and note any changes. If the tape remains intact and shows no sign of stretching or separation after six months, the crack is likely stable. If the tape tears or pulls away, the crack is active and you should call a foundation repair professional for an evaluation.

A more precise version of the tape test uses a crack monitor — a pair of calibrated plastic plates that you glue to either side of the crack. The plates have a grid pattern that lets you measure movement in both the width and the offset directions. Crack monitors are available online for under twenty dollars and provide a quantitative record of crack movement over time.

The tape test is useful for determining whether a crack is active, but it does not tell you whether the crack is structurally significant. A stable crack that is one-quarter inch wide is still a structural crack — it just is not getting worse right now. The tape test helps you decide how urgently to act, not whether action is needed at all.

Epoxy Injection for Non-Structural Crack Repair in Shreveport

Epoxy injection is the standard repair method for cracks in poured concrete foundations that are not caused by ongoing soil movement. A two-part epoxy resin is injected under pressure into the crack, filling it completely and bonding the two sides of the concrete back together. When properly performed, an epoxy injection restores the structural integrity of the concrete — the repaired crack is actually stronger than the uncracked concrete around it.

Epoxy injection is appropriate for shrinkage cracks, for cracks that have been monitored and shown to be stable, and for cracks in foundation walls that are not subject to ongoing movement. It is not appropriate for cracks caused by active soil movement because the soil will continue to move and the epoxy will simply crack again, or the crack will propagate elsewhere in the foundation.

In Shreveport, epoxy injection for foundation crack repair costs $500 to $1,500 per crack, depending on the length and accessibility of the crack. The work is typically completed in a single day, and the epoxy cures to full strength within twenty-four hours. The repair is invisible from the exterior and can be painted over. For cosmetic cracks that the homeowner wants sealed against moisture and insect entry, epoxy injection is a permanent, cost-effective solution.

Polyurethane foam injection is an alternative to epoxy for cracks that are actively leaking water. Polyurethane is a flexible foam that expands on contact with water, filling the crack and creating a waterproof seal. It is used primarily in basement walls where water is seeping through a crack, which is uncommon in Shreveport because basements are rare. For most Shreveport foundation cracks, epoxy is the preferred injection material because it restores structural strength, which polyurethane foam does not.

When Piers Are Needed Instead of Crack Repair

If a crack in your Shreveport foundation is caused by soil movement — differential settlement or heave of the expansive clay — repairing the crack without addressing the soil movement is a temporary fix at best. The soil will continue to move, and the crack will reopen or new cracks will form elsewhere. In these cases, pier installation is the appropriate repair, and crack repair is secondary.

The threshold for deciding between crack repair and pier installation is whether the foundation is still moving. If the tape test shows active movement, or if the crack is accompanied by other signs of foundation movement — sticking doors, sloping floors, brick veneer cracks — piers are likely needed to stabilize the foundation. Once the piers are installed and the foundation is stabilized, the cracks can be repaired with epoxy injection or cosmetic patching, and the repairs will be permanent because the underlying movement has been stopped.

In Shreveport, a foundation repair contractor will typically evaluate the entire foundation, not just the visible crack. They will measure floor elevations across the house to identify settlement patterns, examine the exterior for brick cracks and soil gaps, and inspect the interior for door and window operation issues. The crack you can see may be a symptom of a larger problem that affects parts of the foundation where cracks are not yet visible. Treating the symptom without addressing the cause results in a recurring problem and a wasted repair investment.

When to Call a Professional Immediately

Some foundation cracks demand immediate professional attention in Shreveport. A horizontal crack in a foundation wall — any width, any length — is an emergency. A horizontal crack means the wall is bowing inward under soil pressure, and that pressure will not relieve itself. The wall will continue to bow, and in extreme cases it can fail, allowing the soil to push into the basement or crawl space. If you see a horizontal crack in your Shreveport foundation wall, call a foundation repair contractor immediately.

A crack that is actively growing — you can see that it is wider this month than last month, or the tape test shows movement — requires prompt evaluation. Active cracks indicate active soil movement, and that movement will not stop on its own. The sooner the movement is arrested, the less damage it does and the less the repair costs.

A crack wider than one-quarter inch, regardless of orientation or activity, should be professionally evaluated. A crack of this width in a residential foundation represents a meaningful structural discontinuity, and while it may be stable, it should not be assumed to be harmless without an expert assessment.

If you notice multiple signs of foundation distress — a crack accompanied by a sticking door, a sloping floor, or bricks pulling away from the house — the problem is almost certainly structural and requires professional evaluation. Individual symptoms are easy to dismiss. Multiple symptoms point to a foundation that needs attention.

Call us for a free evaluation of any foundation crack that concerns you in your Shreveport or Bossier City home. We will tell you honestly whether the crack is cosmetic or structural, and we will recommend the appropriate repair — from simple epoxy injection to a full pier installation — based on what your foundation actually needs, not on what we hope to sell.