Types Of Foundation Cracks And How To Fix Them

Types of Foundation Cracks and How to Fix Them Posted By: Mike Taylor, 10 Feb 2:59 pm Category: Foundation Repair

Diagnosing Types of Foundation Cracks

It’s common for foundation cracks to appear over time, especially in the first year of new construction. These cracks may appear near windows, at the corners of walls or floors, or along long spans of your foundation. While many types of foundation cracks are harmless, others may signal structural concerns or water intrusion issues. Knowing the difference helps you decide whether it’s something to monitor or a problem that requires professional repair.

In this guide, we’ll review the most common types of foundation cracks, how to identify them, and when it’s time to call in an expert.

Is This Foundation Crack Normal or a Cause for Concern?

Rather than assuming the worst, start by monitoring any visible cracks for changes. Use a pencil to mark the ends of each crack and write down the date. Over time, this will help you determine whether the crack is stable or continuing to grow. This simple step also provides professionals with helpful information to accurately assess the situation and recommend the most effective foundation repair solution.

Let’s take a closer look at the different types of foundation cracks and what they might mean.

Vertical and Diagonal Foundation Cracks

Typically, a diagonal or vertical crack in the foundation wall results from settlement in the concrete foundation and is quite common in new construction. Because concrete shrinks as it cures, these cracks are referred to as shrinkage cracks. They usually run vertically or diagonally, are often located in the middle section of walls, and are less than 1/8 of an inch wide.

Frequently, you will find vertical cracks in block foundations. If the crack is located closer to a corner and is wider than 1/8 inch, it is likely not due to shrinkage but rather indicates a more serious foundation issue. If your vertical foundation crack is wider than 1/8 inch, it should be evaluated by a professional specializing in foundation repair.

Horizontal Foundation Cracks

Horizontal cracks often indicate a more serious problem. Hydrostatic (water) pressure from the outside of the walls is usually the cause, and that can lead to foundation failure. Most foundations are designed to handle the pressure of water and soil. Additional pressure from heavy rains or flooding can create serious horizontal cracks that require repairs as soon as possible.

If you see horizontal cracking on your foundation walls, contact a qualified contractor immediately to prevent further damage.

When is a Foundation Beyond Repair?

Fortunately, most foundations can be repaired, even if cracks appear significant or severe. At Airlift Concrete Experts, we specialize in foundation lifting using polyurethane foam, a proven method that restores stability and helps prevent future damage.

It’s rare for a foundation to be beyond repair. This typically occurs only when the damage is so severe that the cost of restoring the structure exceeds the value it adds to the home. In these uncommon situations—such as when a foundation has completely collapsed or the structural integrity of the house is compromised—replacement may be the only viable option.

Warning signs of foundation problems include:

• Cracks that change direction or widen significantly
• Walls that are noticeably bulging
• Floors that slope or feel unstable
• Cracks that grow quickly after rain or flooding
• Gaps large enough to fit a dime or wider

If you notice any of these signs on your Arkansas property, please contact our team for a thorough inspection. If walls are bulging after heavy rains or flooding, your foundation may be at risk of imminent collapse.

Repairing Vertical or Diagonal Cracks

Vertical and diagonal cracks in your foundation walls are often caused by natural settling and don’t always signal structural damage. In many cases, if the surface of the crack feels smooth and even when you run your finger across it, it’s likely not an immediate concern.

However, some homeowners—or inexperienced contractors—attempt to fix these cracks by chiseling a V-groove and filling it with hydraulic cement. While this may appear to solve the issue, the patch typically doesn’t bond well with the original concrete. Over time, temperature shifts and moisture can cause the crack to reopen, often leading to water intrusion.

At Airlift Concrete Experts, we offer lasting solutions for repairing vertical and diagonal foundation cracks. For minor cracks or signs of water seepage, we use professional-grade epoxy injections that seal and reinforce the damaged area. If a crack is wide enough to fit a dime, it may indicate a more serious issue requiring structural repair. In such cases, we provide targeted services, including foundation lifting using polyurethane foam, to restore the integrity of your foundation and prevent future problems.

Repairing Horizontal Cracks

Horizontal cracks are often a sign of serious structural issues and can eventually lead to the complete failure of the foundation wall if not addressed. These cracks are typically caused by excessive lateral pressure from water-saturated soil pushing against the exterior walls. Poor grading and drainage around the home contribute to this problem by allowing water to collect near the foundation. Homes built on clay-rich soils—which expand and contract significantly with moisture changes—are especially susceptible to this type of stress.

To repair horizontal foundation cracks, one of the most effective techniques is epoxy injection. This process bonds the concrete back together, restoring its original strength and structural integrity. Epoxy not only reinforces the wall but also creates a durable seal that protects against air, water, and chemical intrusion. When applied correctly, epoxy injection can leave the foundation as strong and stable as when it was first poured.

See Before & After Photos More Common Foundation Problems

Go Crack-Free Forever With Professional Foundation Repair

Identifying the different types of foundation cracks is the first step toward protecting your home. At Airlift Concrete Experts, we provide long-lasting solutions designed to restore your foundation’s integrity and prevent further damage.

Need help evaluating your foundation? Contact us to schedule a free inspection for your Arkansas property. You can also explore our YouTube channel and blog library for more resources and information on foundation repair solutions to keep your home strong, stable, and crack-free for years to come.