Helical Piers vs Push Piers: Which Foundation Fix Is Right for Your Atlanta Home?

Your foundation contractor says you need piers. But which kind? Helical piers and push piers are the two most common methods for permanently stabilizing a settling foundation, and both are widely used in Metro Atlanta. They solve the same problem—a foundation that has moved because the soil underneath can’t support it—but they work in fundamentally different ways, cost different amounts, and each has situations where it’s the better choice.

What Is the Difference Between Helical Piers and Push Piers?

The core difference is how they reach stable soil. Push piers are steel tubes hydraulically driven straight down into the ground using the weight of your house as resistance. They’re pushed through the unstable clay until they reach bedrock or a load-bearing stratum that can support the foundation’s weight. Helical piers are steel shafts with helical (screw-shaped) plates welded to them. They’re mechanically screwed into the ground like a giant auger until the helical plates reach stable soil. The torque required to turn them is measured and correlated to the load-bearing capacity of the soil they’ve reached. Both types transfer the weight of your foundation from the unstable surface soil to the stable soil or rock below—permanently ending the settlement.

How Do Push Piers Work?

Push pier installation starts with excavating a small area next to the foundation footing—typically 2 to 3 feet wide and deep enough to expose the footing. A steel bracket is attached to the footing, and steel pier sections (typically 3 to 4 feet long each) are hydraulically pushed through the bracket into the ground, one section at a time. The hydraulic ram uses the weight of the structure itself as the reaction force—the heavier the structure, the more effectively the piers can be driven. Piers are driven until they reach a soil layer that provides sufficient resistance (refusal). Once all piers are installed, the hydraulic system is used to simultaneously lift the foundation—potentially returning it toward its original elevation. The weight of the house is then permanently transferred from the failing soil to the pier system.

How Do Helical Piers Work?

Helical pier installation also begins with a small excavation at the footing. The helical pier—a steel shaft with one or more helical plates—is mechanically rotated into the ground using a hydraulic torque motor. As the pier advances, the torque required to turn it is continuously measured. When the torque reaches a predetermined threshold (calculated based on the foundation’s load requirements), the pier has reached soil with adequate bearing capacity. A bracket connects the pier to the foundation footing, and the load is transferred from the unstable soil to the helical pier. Like push piers, helical piers can be used to lift a settled foundation back toward its original position.

When Are Push Piers the Better Choice?

Push piers excel in specific conditions. They work best under heavier structures—the foundation needs sufficient weight (typically 2+ stories or substantial construction) to provide the reaction force needed to drive the piers. They perform well when bedrock or dense bearing soil is at a moderate to significant depth—in parts of Metro Atlanta, stable bearing soil may be 15 to 30 feet below the surface, and push piers can be driven to whatever depth is necessary. They’re generally less expensive per pier than helical piers because the steel tube sections cost less than helical shafts. And they produce minimal soil disturbance during installation because the pier displaces soil rather than removing it. For most two-story Atlanta homes with settling foundations over deep clay, push piers are the standard recommendation.

When Are Helical Piers the Better Choice?

Helical piers are the better option in several situations. They work for lighter structures that don’t provide enough weight for push pier installation—single-story homes, additions, porches, decks, and detached garages. They can be installed at an angle, which makes them useful in tight spaces or for stabilizing walls (not just footings). Their torque-based installation provides a measurable, verifiable indicator of the soil’s bearing capacity at the exact depth where the pier stops—this gives engineers and contractors a quantifiable data point for each pier. They can be installed in both new construction (before the structure is built) and existing construction. And they’re effective in situations where the stable bearing soil is at a relatively shallow depth (under 15 feet), where their screw-in design provides more reliable anchoring than a push pier might.

Cost Comparison for Atlanta Homes

Push piers typically cost $1,000 to $3,000 per pier installed. Helical piers typically cost $1,500 to $3,500 per pier installed. The higher cost of helical piers reflects the more expensive materials (helical plates welded to the shaft) and the specialized equipment needed for installation. Most residential foundation repairs in Atlanta require 6 to 12 piers, so the total cost difference between methods can be significant. A 10-pier push pier installation might cost $12,000 to $20,000, while the same job with helical piers would run $15,000 to $25,000. However, if helical piers are the technically correct solution for your situation (light structure, shallow bearing soil, angle installation needed), using push piers instead to save money would be the wrong choice—they simply may not work in those conditions.

How Does Atlanta’s Soil Affect the Choice?

Metro Atlanta sits on a complex geology. The surface layer is predominantly red clay—the expansive, moisture-sensitive soil that causes most foundation problems here. Beneath the clay, conditions vary. In some areas (particularly parts of Gwinnett and DeKalb counties), the Piedmont geology means decomposed granite and rock may be encountered at 15 to 25 feet. In other areas, stable bearing soil is deeper. The depth to stable soil directly affects pier cost because longer piers require more material and labor. Your contractor should explain what they expect to find beneath your home based on local soil data and their experience with nearby properties. In areas where bedrock is relatively shallow, push piers are efficient because they drive quickly to refusal. In areas with deep, variable soil, helical piers’ torque measurement provides more certainty about bearing capacity.

Can Piers Actually Lift My Foundation Back Up?

Yes, in many cases. Both push piers and helical piers can be used to lift a settled foundation back toward its original elevation—a process called foundation leveling or underpinning with lift. The degree of lift possible depends on how far the foundation has settled, whether the structure can tolerate the stress of being raised, and whether plumbing, utilities, and attached structures will be affected by the movement. Complete restoration to the original elevation is not always possible or advisable. Most contractors aim to recover as much elevation as the structure can safely tolerate—which often closes cracks, frees stuck doors, and improves floor levelness significantly even if the foundation doesn’t return to perfectly level.

What Warranty Should You Expect?

Both push piers and helical piers are permanent solutions designed to last the life of the structure. Reputable contractors offer warranties of 25 years to lifetime on pier installations. The warranty should cover both the piers themselves and the labor, and it should be transferable to future homeowners—this protects your home’s resale value. At Reliable Solutions Atlanta, our foundation pier installations come with an extensive transferable warranty. Ask for warranty details in writing before signing with any contractor.

Get the Right Recommendation for Your Home

The choice between helical piers and push piers should be made by an experienced foundation contractor based on your specific structure, soil conditions, and the nature of the settlement. At Reliable Solutions Atlanta, we assess all of these factors during our free foundation inspection and recommend the method that provides the most reliable, cost-effective result for your situation. We explain why we’re recommending one method over the other so you understand the decision. Call 770-895-2039 to schedule your free inspection.

Frequently Asked Questions

How long does pier installation take?

Most residential pier installations take 1 to 3 days depending on the number of piers and site conditions. A straightforward 8-pier installation on accessible footings can often be completed in a single day. Complex jobs with many piers, difficult access, or deep soil conditions may take 3 to 5 days. You can remain in your home during the work.

Will pier installation damage my landscaping?

Each pier requires a small excavation (roughly 2 to 3 feet square) at the footing. Landscaping immediately adjacent to the foundation will be disturbed in those specific spots, but the impact is localized. Contractors backfill and compact the excavations after installation. Plants and shrubs in the immediate work area may need to be temporarily relocated, but the majority of your landscaping is unaffected.

Can you use both types of piers on the same house?

Yes, and this happens more often than you might think. A two-story section of a home might get push piers (which use the heavier weight effectively), while a single-story addition or porch gets helical piers (which work better under lighter loads). The contractor should recommend the right pier type for each section based on the load and soil conditions at that location.