Slab Piers: Stabilizing and Lifting Sunken Concrete Slab Foundations
A structural method for settled slab on grade homes across North and South Carolina that carries the weight of the slab down to firmer soil below the surface.
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What to Know About Slab Piers
A settled slab has lost steady support in the soil beneath it, so slab piers carry that part of the load down to soil that can hold it. Our crew drives sections of steel pier to depth, at pier points along the affected areas and ties them into a bracket that holds the slab. Each pier advances until it reaches firm soil or bedrock and the resistance the plan calls for, below the soil that let the slab settle.
The weight of the slab then moves onto the piers, which are designed to hold it against further settling. Working the piers in a controlled sequence can often lift the slab back toward its original height. That may help close cracks running across a slab floor and bring an interior floor that has dipped closer to level. We do not promise a perfect return to level.
Slab piers reach past the active upper soil, so they suit the seasonal clay movement of the Piedmont and the SC Upstate. They do not change how water moves around the home, so the inspection looks at how water reaches the foundation and whether lifting with polyurethane foam or a different pier approach fits better.
The symptoms that usually lead to slab piers are on the foundation repair problem signs page, alongside the other signs that point to the same underlying cause.
How We Install Slab Piers
Free Inspection and Diagnosis
We start by looking at the slab and at why it settled. We measure how far and in which direction it has settled, look at signs inside the home such as tile and grout lines cracking, and check how water reaches the foundation. In Piedmont or SC Upstate clay that swells and shrinks with the seasons, or Sandhills sand where fine particles wash out, the cause shapes the recommendation. We will tell you plainly if slab piers are not the right fit.
Confirm the System and Explain the Plan
Slab piers suit many settled slab foundations but not every situation. A home with a crawl space or basement may be better served by piers fixed to the footings instead. We confirm whether slab piers fit your house and soil, map out where the piers will go and roughly how deep we expect to drive them, and walk you through the plan before anything begins.
Set the Pier Locations and Brackets
Our crew prepares each pier location along the affected areas of the slab and sets the bracket the pier will hold. The bracket is what carries the load from the slab to the pier once the pier is seated, so placement is planned around where the slab has lost support.
Drive the Piers to Firm Soil
Sections of steel pier are driven into the ground beneath the slab and advanced in order until each pier reaches firm soil or bedrock and meets the required resistance. Reaching that firmer layer tells us the pier rests below the clay layer that swells and shrinks.
Transfer the Load, Lift If Possible, and Restore the Area
With the piers seated, the weight of the slab moves onto them to stabilize the foundation. Where conditions allow, we work the piers in a controlled, monitored sequence to lift the slab back toward its original height. We then finish the pier locations, clean up the work area, and review the result with you.
Care and Expertise From a Team Serving the Carolinas Since 2017
When the fix is slab piers, our own crews do the work. HydroHelp911 handles foundation repair and related structural and moisture work across North and South Carolina.
An inspector looks at your home, finds the source of the problem, and explains each finding in plain language. There is no obligation.
We are headquartered in Dallas, North Carolina, with eight offices across North and South Carolina.
Foundation repair, crawl space repair and encapsulation, basement waterproofing, framing repair, and concrete leveling are the whole focus of the team.
We have 1,300+ verified Google reviews (4.9 stars) from homeowners across the Carolinas and are BBB A+ Accredited.
For example, helical and push piers carry a lifetime warranty that no additional settlement will occur in the area of installed piers, once the final invoice is paid in full. Read the warranty terms.
Ask your inspector about financing when you get your written estimate. See financing options.
Common Questions About Slab Piers
Don't see your question here? Call or fill out our quick online form, and our team will help.
They solve different problems. Mud jacking lifts a slab by pumping a cement slurry into the empty space beneath it, which often works well for flatwork like driveways, sidewalks, and patios. Slab piers are a deeper structural repair: steel piers carry the weight of the slab down to firmer soil so the load no longer rests on the shifting upper soil. For a settled slab foundation, piers reach past the soil that caused the movement, while mud jacking fills the gap above it. During your inspection we explain whether piers fit your slab and why.
Which Foundation Repair Problem Signs Can Slab Piers Help With?
A sign can trace to more than one cause. These are the foundation repair signs that can point to a cause this method addresses; the inspection shows which cause is at work in your home.
Foundation Settlement
When part of your home drops because the soil beneath it has moved or compressed, the symptoms show up as cracks, sticking doors, and uneven floors.
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Floor Cracks
Cracks in a concrete slab, or in tile and grout, can be cosmetic, or they can be the floor reacting to a foundation that has moved.
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Doors Not Latching
A door that sticks, drags, or won't catch its strike plate is often a sign that the structure holding the frame has shifted.
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Cracks in Floor Tiles and Grout
Tile and grout are rigid, so they crack when the floor under them flexes or drops.
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Sticking Doors and Windows
A door that suddenly drags or a window that won't slide is often the first thing homeowners notice when a foundation moves.
Learn MoreSinking Foundation
When part of your home is dropping because the soil beneath it can no longer hold the load, the signs show up as cracks, sticking doors, and floors that pull away from level.
Learn MoreOther Foundation Repair Solutions We Install
Each solution fits a different cause. The inspection shows which one your home needs.
Carbon Fiber Reinforcement
When soil and water pressure starts pushing a foundation wall inward, carbon fiber straps bond to the wall and resist that load, a slim repair for minor to moderate bowing.
Learn More
Epoxy or Polyurethane Crack Injection
A targeted way to seal cracks in poured concrete foundation walls and stop water seepage, paired with a careful look at what caused the crack in the first place.
Learn More
Foundation Underpinning
When the soil near the surface can no longer carry your foundation, underpinning reaches deeper ground to stabilize the structure.
Learn More
Helical Piers
Steel piers shaped like large screws, turned down below the active surface soil to support and, where possible, lift a settling foundation.
Learn MoreDeep Foundation Systems
When the soil near the surface keeps moving, we install piers that carry your home's weight down to ground that holds, and only after a free inspection.
Learn MoreGrout Injection (Chemical Grouting)
A targeted way to fill voids and firm up weak or shifting soil under foundations and slabs, so settlement has less room to continue.
Learn MoreGuides and Answers
More Reading on Foundations
An article from our team about foundations and the repairs we make.
Foundation Repair
Repair Methods for a Shifting House
A shifting house is usually repaired with piers that reach more stable soil, wall anchors or carbon fiber for bowing walls, and crawl space jacks for sagging floors.
Get the Free Foundation Repair Guide
A free guide for homes in North and South Carolina: what can move a foundation here, the signs worth writing down, and how foundation repairs work, in plain language.
- A room by room checklist to walk your home with
- Why foundations move in Piedmont clay, on hillsides and near the coast
- How piers, wall anchors and other repairs work
- Five questions worth asking any contractor, including us
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Before you choose a contractor for slab piers, read how homeowners across North Carolina and South Carolina rate our work.
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