How to Repair Broken or Sinking Concrete Steps

Before and after comparison of sunken outdoor concrete steps, showing lifted and aligned treads after PolyLevel foam repair.

A set of concrete steps may seem strong, but when cracks appear or the slabs begin to sink, it’s a clear sign something is wrong. These issues don’t just look bad—they create safety hazards and lead to more damage if not repaired early.

In this guide, we’ll cover everything you need to know about concrete step repair, including why it happens, the best modern solutions like polyurethane lifting (also called foam jacking), and how Ogburn Concrete Leveling and Resurfacing can help restore your steps quickly and permanently.

Before and after comparison of sunken outdoor concrete steps, showing lifted and aligned treads after PolyLevel foam repair.

Why Do Concrete Steps Break or Sink?

Concrete is tough—but it’s not invincible. Over time, even the strongest steps can break down. Here are the most common causes:

Soil Problems

The ground beneath your steps matters. When soil shifts, settles, or washes away, it creates empty spaces (voids) under the concrete. Without proper support, the concrete cracks and sinks. This is called settlement—and it’s the leading cause of sunken concrete.

Water Issues

Too much water or poor drainage can erode the soil beneath your steps. On the flip side, dry weather causes soil shrinkage. Both extremes weaken the base your concrete sits on, making slab leveling a necessity.

Freeze-Thaw Damage

In colder climates, water gets into small cracks in the concrete. When it freezes, it expands—causing those cracks to grow. Over time, this cycle leads to chipping, crumbling, and further sinking.

Tree Roots and Organic Growth

Roots from nearby trees can push under the concrete and lift it. This uneven pressure often leads to cracks and tilting.

Why Broken Steps Are a Serious Problem

Ignoring a damaged step might seem harmless—but here’s what’s really at stake:

Safety Hazards

Sunken or broken steps are major tripping risks. A difference of even half an inch in step height can cause someone to fall. Trip hazard removal is not just about safety—it’s about peace of mind.

Drainage Problems

When concrete settles unevenly, it can block water flow and cause pooling. This might lead to foundation damage, mold, or basement leaks.

Curb Appeal and Value

First impressions matter. Cracked, sinking steps can make a home look uncared for, lowering property value and scaring off potential buyers.

Long-Term Structural Issues

A small crack can grow into a big problem. Once water enters and the soil shifts, the concrete deteriorates faster.

Common DIY Fixes—and Why They Don’t Last

Many homeowners try temporary fixes like patching cracks or using store-bought caulk. While this might look better for a short time, it doesn’t solve the underlying problem: unstable soil. Without structural repair, the concrete will continue to settle—and so will your patch job.

Best Modern Solution: Polyurethane Lifting (Foam Jacking)

The best way to fix sunken steps is to lift and level the slab from underneath using polyurethane foam. At Ogburn Construction, we use the PolyLevel® system—a state-of-the-art concrete leveling method that works fast and lasts for years.

What Is PolyLevel?

PolyLevel is a two-part expanding foam that’s injected under your concrete. As it expands, it fills voids, lifts the slab, and locks everything into place.

How It Works:

  1. Small holes (the size of a pencil eraser) are drilled in the concrete.
  2. The foam is injected as a liquid, expanding beneath the slab.
  3. As it hardens, it raises the concrete back to a safe, level position.
  4. The holes are patched, and your steps are ready to use—often within 15 minutes.

 

Why PolyLevel Is Better Than Mudjacking or Replacement:

  • Lightweight: Won’t add extra stress to weak soil.
  • Strong: Lifts up to 4,800 lbs per square foot.
  • Waterproof: Won’t wash out like other materials.
  • Fast: Minimal downtime—no waiting days to use your steps.

Complementary Repair: NexusPro Crack Sealant

After your concrete is lifted, we seal cracks and joints with NexusPro®—a long-lasting silicone-based sealant that stays flexible and resists UV rays. It cures in just 24 hours and protects your concrete from further water damage.

Step-by-Step: The Ogburn Concrete Step Repair Plan

Here’s what it looks like when you work with Ogburn Construction:

Step 1: Free Inspection

We evaluate your steps, take precise measurements, and use our Concrete Health Checklist to assess the overall condition of your steps.

Step 2: Same-Day Repair Plan

Our design specialist will explain what’s causing your concrete issues and provide a written estimate using our digital system. 

Step 3: PolyLevel Injection

Our trained crews drill tiny holes, inject the foam, and watch your concrete lift back to level—right before your eyes.

Step 4: Crack Sealing and Cleanup

We apply NexusPro sealant, clean the work area, and do a final walkthrough to make sure you’re happy with the result.

Step 5: Peace of Mind

We offer a 10-year warranty on settlement repairs—so you can rest easy knowing your repair is built to last.

How to Know When Your Concrete Steps Need Help

If you see any of the following signs, it’s time to call for a professional concrete repair estimate:

  • Sunken or tilted steps
  • Gaps between the steps and your house
  • Cracks wider than 1/8 inch
  • Water pooling near the base of your steps
  • Uneven height between steps

These are all signs of sunken concrete, and they won’t get better on their own.

For more information, see Concrete Repair Guide: Common Issues, Fixes & Costs Explained.

Why Choose Ogburn Construction?

We’ve been serving Virginia homeowners since 1988, and we’re proud to be family-owned and local. Our team specializes in sidewalk lifting, concrete step repair, and slab leveling using the most advanced materials and methods.

  • Over 30 years of experience
  • Hundreds of 5-star reviews
  • Eco-friendly, mess-free solutions
  • Trained, certified crews
  • Serving Greater Richmond & Central Virginia

Fix Your Steps Before They Get Worse

Sinking steps don’t fix themselves. Waiting can mean more damage, higher costs, and bigger safety concerns. With Ogburn Concrete Leveling and Resurfacing, you get expert service, quick results, and permanent peace of mind.

Ready to lift your sunken steps?

Schedule your free concrete repair estimate today and restore safety, value, and curb appeal to your home.

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