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What Is Helical Pier Installation and When Is It Needed?

Last updated October 23, 2026

The short answer

Understanding Helical Piers

Think of helical piers as giant screws for your house. They are made of galvanized steel and have helical plates welded onto a central shaft. A machine twists these piers deep into the earth until they reach a load-bearing layer of soil. The piers then act as anchors, providing stable support for the foundation that the compromised surface soil cannot. This method is a permanent solution for shifting and sinking foundations.

Common Causes for Foundation Instability

Many factors can make the soil under a home unstable, leading to settlement. Expansive clay soils shrink and swell dramatically with moisture changes. Persistent moisture from plumbing leaks or poor drainage can erode or oversaturate the ground. Over time, this soil movement creates voids or pressure that cause foundations to shift, crack, or sink unevenly.

Signs You May Need This Repair

Your home often gives clear signals when foundation support is failing. These signs result from the structure moving as the ground beneath it shifts. It is crucial to have a structural engineer or qualified foundation professional assess these symptoms. They can determine if helical piers or another solution are the right way to stabilize your home.

  • Visible cracks in your foundation walls, especially stair-step cracks in block or brick.
  • Cracks radiating from door frames or windows, or doors that no longer close properly.
  • Uneven or sloping floors that you can feel when walking across a room.
  • Gaps appearing between walls and the ceiling or floor.
  • Exterior cracks in stucco or brick veneer.
  • Water pooling near the foundation or signs of chronic moisture issues.

How Water Damage Leads to Foundation Issues

Water is a primary enemy of foundation stability. A burst pipe under a slab, a leaking sewer line, or chronic gutter overflow can saturate the soil. In many climates, cycles of extreme dryness followed by heavy rain can stress expansive soils. This constant change weakens the ground's ability to bear your home's weight uniformly.

  • Saturated soil loses strength and can liquefy or wash away.
  • Expansive clay soils swell when wet, pushing the foundation up.
  • The same soils shrink when dry, causing the foundation to drop.
  • Erosion from water flow creates voids under concrete slabs.
  • Tree roots seeking moisture can also dry out and destabilize soil.

The Repair and Restoration Process

The installation process begins with an assessment to locate stable soil depth. Holes are drilled for the piers, which are then mechanically screwed into the ground. Once installed, hydraulic jacks on the piers can gently lift the foundation back toward its original level. After stabilization, the foundation is secured to the piers. Any related water damage inside the home, such as cracks in walls or damaged flooring, should be repaired separately to restore your living space.

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Frequently asked questions

Can helical piers be installed in any season?

Yes, helical pier installation is not heavily dependent on weather. The equipment can operate in most conditions. The key factor is accessing the work area around your foundation. Frozen ground can make installation more difficult, but it is not a barrier in most climates.

How long does a helical pier installation take?

The timeline varies widely based on the home's size and the number of piers needed. A typical project for a section of a house might take a few days. More extensive repairs for an entire foundation can take a week or more. Your contractor will provide a specific schedule.

Does homeowners insurance cover helical pier installation?

Coverage is rare for foundation repair unless the cause is a sudden, covered event like a burst pipe. Damage from long-term soil movement or neglect is typically excluded. Policies vary, and your insurer decides what is covered. You should review your policy and speak directly with your insurance adjuster.

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