Push Piers vs Helical Piers vs Slabjacking for Kansas City Homes

Your house is sinking, and three different contractors gave you three different fixes. One says push piers. One says helical piers. One says just lift the slab. So which one is right for your Kansas City home?

The honest answer: it depends on what's sinking, how heavy it is, and the dirt under it. Our soil here is Wymore-Ladoga clay. It runs 60 to 80% clay, and the USDA rates its shrink-swell as "very high." That clay swells when it rains and shrinks in a drought. About 56% of Kansas sat in drought as of May 2026. So your foundation is getting pushed and pulled all year.

This guide breaks down all three methods. Real Kansas City prices. No sales fluff.

Quick Decision Flowchart

Start here. Match your problem to the fix.

When you're not sure, that's normal. The dirt below the surface tells the real story, and you can't see it from the driveway. That's what a free inspection is for.

How Each Method Works

Three tools. Three jobs. Here's the plain version.

Push Piers

Push piers are hollow steel tubes. We drive them straight down through the soft clay until they hit something solid — dense rock or shale deep below. Then we use the weight of your house to push them down hard and lock them in.

Once they're set, we transfer your home's weight off the bad soil and onto the piers. Many homes can be lifted back close to level. Push piers go deep. That matters in Kansas City, because our clay stays unstable for several feet down. You want to reach past it.

Helical Piers

Helical piers look like a giant screw. The steel shaft has wide plates welded near the bottom. We turn them into the ground with a machine, like driving a screw into wood.

They don't need your home's weight to install. The screwing action pulls them down and the plates grip the soil. That makes them great for lighter loads and for new construction where the weight isn't there yet. Porches, decks, garages, additions, light exterior walls — helical piers shine here.

Slabjacking

Slabjacking lifts a slab that dropped, without piers at all. We drill small holes in the concrete. Then we pump material underneath — either a cement-and-soil slurry (mudjacking) or expanding polyurethane foam (foam lifting). The material fills the empty space below and pushes the slab back up. We patch the holes. See our concrete lifting and leveling page.

It's faster and cheaper than piers. But it only fixes the slab. It does nothing for a settling house wall. So if your foundation is the problem, slabjacking is the wrong tool.

Comparison Table

Here's all three side by side, with real Kansas City numbers.

A few notes on those numbers. Push piers run $1,250 to $2,500 per pier here in Kansas City (KC Pier, public 2026 figures). Most homes need 3 to 8 piers, so do the math on your settled section.

Across the whole metro, foundation repair averages $5,569, with jobs landing anywhere from $1,953 to $9,185 (Angi, 2026). A small slab fix sits at the low end. A multi-pier underpinning job is the high end. See our full foundation repair costs breakdown.

Which Wins for KC Clay

So which one wins under Kansas City dirt? For a sinking house on our Wymore-Ladoga clay, push piers win most of the time. That clay is 60 to 80% clay particles that grab water and let go of it, and the unstable layer runs deep. Push piers drive past it to rock or shale and stay put. Your house rides on solid ground instead of moody clay.

Helical piers still win in the right spot. A light porch. A new addition. A garage slab edge. A deck footing. When the load is light, the screw-in grip is plenty, and you skip needing the home's weight to install.

Slabjacking wins for a flat slab that dropped but isn't tied to a failing house wall. Sunken driveway. Patio that pools water toward the house. A garage floor with a low corner. Lift it, fill the void, done. Just know the clay can move again under that slab later, which is why the warranty is shorter.

The freeze-thaw cycle makes all of this worse. Water gets into the clay, freezes, expands, thaws, and the ground heaves and drops over and over. Every winter chips away at a foundation that wasn't underpinned deep.

What HFR Recommends and Why

We're Heartland Foundation Repair, and we've fixed Kansas City foundations for over 40 years. So here's what we actually tell homeowners.

For a settling house on Kansas City clay, steel push piers are a common long-term fix. They reach the stable rock or shale below our clay, and they carry a transferable lifetime warranty on most installs. When your home settles on unstable soil, going deep is what lasts.

But we don't over-engineer a job to pad the bill. If your problem is a light porch or a new addition, we'll spec helical piers because that's the right tool and it costs you less. If it's a dropped driveway slab with sound house walls, we'll slabjack it and save you thousands. The point is the diagnosis, not the upsell. Read our questions to ask your foundation repair contractor before you sign anything.

Here's how to know you actually need a pro. Use the crack ruler:

If you're seeing any of those, don't wait for the next drought to make it worse. Get a free inspection. We'll measure, find the cause, and tell you the honest fix — push pier, helical, or slab — and what it costs before any work starts. Browse our full foundation repair services or the foundation repair FAQs, or just contact us for a free quote.

Frequently Asked Questions