What Are Helical Piers Used for in Foundation Repair?
Last updated October 26, 2026
The short answer
Why Foundations Settle
Foundations settle when the soil underneath can no longer support the weight of your home. This often happens after water damage, when saturated soil compresses or washes away. The result is that parts of your foundation sink lower than others, causing structural problems. Over time, this can lead to uneven floors and gaps around windows or doors.
Water damage is a common trigger for settling. A broken pipe or a flood can soften the ground beneath your slab or piers. If you notice new cracks in your walls or floors that seem to widen, the foundation may be shifting. Acting quickly can help prevent more serious damage, such as bowing walls or a collapsed section of the foundation.
How Helical Piers Work
Helical piers are steel shafts with spiral plates near the bottom. A pro drives them into the ground using special equipment until they reach load-bearing soil. Then they attach brackets to your foundation and use the piers to lift or stabilize it. Each pier is turned like a screw, which helps it grip the soil firmly.
The spiral design acts like a screw, allowing the pier to grip the soil firmly. This method works well for lighter structures like residential homes. The piers can be installed in most soil types, but the exact depth needed depends on the conditions under your property. A pro will test the soil to determine how deep to go.
When You Might Need Them
You might need helical piers if your foundation has settled unevenly. Signs include cracks in drywall, doors that stick, or windows that no longer close properly. If you have had water damage, especially from a flood or a long-term leak, the soil may have lost its strength. This can happen slowly, so you might not notice the damage right away.
A professional inspection can tell you whether piers are the right fix. The pro will examine the foundation, check the soil, and measure how much settling has occurred. Based on that, they can recommend a plan. Not every settling issue requires piers, so an honest assessment matters. Sometimes simple drainage fixes solve the problem.
What the Installation Involves
Installing helical piers usually takes a few days, but the timeline depends on the size of your home and the number of piers needed. The pro will first dig small access pits around your foundation. Then they drive the piers into the ground, checking each one for proper depth. They use a torque motor to screw the piers into place.
Once the piers are in place, the pro can lift the foundation back to its original level. This process is gradual to avoid cracking. After installation, the work area is backfilled, and the surface is restored. You can expect some noise and vibration during the process. The pros will clean up the site before they leave.
Cost Considerations
The cost of helical piers varies widely. It often ranges from a few thousand to several thousand dollars, but the final price depends on factors like the number of piers, the depth required, and the accessibility of your foundation. Your location and the condition of your soil also play a role. The more piers you need, the higher the cost.
Because the cost can be significant, it is wise to get a detailed explanation of what the work involves before agreeing. Ask the pro to walk you through the plan and the expected outcome. That way you understand what you are paying for and why. Also, check with your insurance company about coverage, as policies vary, and your insurer decides what is covered.
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Call Now (919) 525-3233Frequently asked questions
How long do helical piers last?
Helical piers are made of steel and are designed to last for many decades. Their lifespan depends on soil conditions and whether they are properly installed. In most cases, they provide a long-term solution for foundation settling. A pro can give you a better idea based on your specific situation.
Can helical piers be used for any type of foundation?
Helical piers work well for many foundation types, including slab, crawl space, and pier-and-beam foundations. However, the suitability depends on the weight of your home and the soil conditions. A professional inspection will help determine if they are the right option for your property.
Do helical piers fix cracks in the foundation?
Helical piers stabilize the foundation and stop further settling, but they do not repair existing cracks. After the piers are installed, a pro can fill and seal the cracks to prevent water intrusion. That separate repair is often part of the overall foundation restoration process.
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