The Complete Guide to Concrete Lifting

Uneven concrete is a safety hazard. Whether it’s a sunken driveway, a tilted patio, or a tripping hazard on your sidewalk, these issues don’t fix themselves. Over time, they only get worse.

Sunken concrete happens for a reason. Poor soil compaction, erosion, and freeze-thaw cycles can cause slabs to shift and sink. Left untreated, the problem can lead to costly repairs or even full concrete replacement. But there’s a faster, more affordable solution: concrete lifting.

In this article, you’ll learn:

• How concrete lifting works and why it’s better than replacing your slabs.
• The benefits of polyurethane foam over traditional mudjacking to lift and level concrete.
• How to choose a trusted concrete lifting service in Calgary.

Let’s dive in.

What is Concrete Lifting?

Concrete lifting is a process used to raise sunken slabs back to their original level without the need for costly replacement. Instead of tearing out and replacing damaged concrete, this method injects material underneath the slab to fill voids and lift it into place.

Sunken concrete is a common issue caused by soil erosion, poor compaction, and freeze-thaw cycles. Over time, gaps form beneath the slab, which leaves it unsupported. Eventually, the weight of the concrete causes it to sink and creates uneven surfaces and potential tripping hazards.

A common area where this occurs is driveways. Many homeowners wonder what causes a driveway to sink, and the answer often lies in shifting soil, improper drainage, and natural settling over time. Understanding the root cause can help prevent further damage.

Traditionally, homeowners and businesses would replace their concrete, which is expensive, time-consuming, and disruptive. Concrete lifting is the smarter alternative—it’s quicker, more affordable, and prevents further damage. Whether it’s a sidewalk, driveway, or patio, lifting the slab restores safety and functionality without the mess of a full replacement.

The Process of Concrete Lifting

Here is the entire process of concrete lifting.

Step 1 – Inspection

Every project begins with a detailed assessment. A professional examines the affected concrete slabs to identify voids, sinking patterns, and underlying causes. This step ensures that the right lifting technique is used for long-lasting results.

Step 2 – Drilling Injection Holes

To raise the slab, small holes (typically less than an inch wide) are drilled into the surface. These holes provide access to the void beneath the concrete, where the lifting material will be injected. Unlike full slab replacement, this process is minimally invasive and requires fewer resources.

Step 3 – Foam Injection and Lifting

The key to effective concrete lifting is the injection of polyurethane foam. Once injected, the foam expands, filling the empty space beneath the slab. This expansion re-establishes support, evenly lifting the concrete to its original height. Unlike mudjacking, which uses a heavy slurry that may sink over time, polyurethane foam is lightweight, strong, and long-lasting.

Step 4 – Finishing and Cleanup

Once the slab is back in place, the drilled holes are sealed, and the surface is cleaned. The process is quick—most areas can be walked or driven on within a few hours. No need to wait days for curing like in traditional concrete work.

For a detailed look at how professionals ensure precise lifting and leveling, check out Sunny South Inc. process for lifting and leveling concrete. Our method guarantees long-term results with minimal disruption.

Polyurethane Concrete Lifting vs. Mudjacking

When it comes to lifting sunken slabs, there are two main options: polyurethane foam lifting and mudjacking. While both methods aim to raise and level concrete, polyurethane lifting has become the superior choice due to its efficiency and durability.

Polyurethane Foam Lifting

• Lightweight and non-invasive – The foam is lightweight and prevents further soil compression.
• Quick curing time – The injected foam expands rapidly, which allows the slab to be used within hours.
• Longer-lasting results – The foam is water-resistant and doesn’t break down over time, which also ensures lasting support.

Mudjacking

• Heavy material – Mudjacking uses a dense slurry that can add too much weight and worsens the sinking issue.
• Longer curing time – Since it relies on a cement-based mixture, drying can take a full day or more.
• Requires larger holes – Mudjacking requires drilling bigger injection holes, which makes the process more invasive.

Polyurethane lifting is the smarter choice for homeowners and businesses looking for a fast, reliable, and long-term solution. Unlike mudjacking, which can cause further settling, polyurethane stabilizes the slab, eliminates voids, and prevents future sinking—all with minimal disruption.

Benefits of Concrete Lifting

Here are the benefits of concrete lifting.

Cost-Effective Alternative

Concrete lifting is significantly cheaper than full slab replacement. Instead of demolishing and pouring new concrete, you can lift and level existing slabs for a fraction of the cost.

Fast and Minimal Downtime

Most concrete slab lifting projects are completed in a few hours, and you can use the surface the same day. No long curing periods, and no waiting weeks for new concrete to set.

Eco-Friendly Solution

Using polyurethane foam to not only fill voids but also stabilize the soil eliminates the need for heavy excavation. It reduces waste, preserves resources, and minimizes disruption to the surrounding area.

Durability and Longevity

Polyurethane foam is waterproof and resistant to weather changes, unlike traditional materials that erode over time. It provides long-term stability, which prevents future sinking and cracking.

Safety Improvement

Uneven sidewalks, driveways, and patios pose tripping hazards for homeowners, pedestrians, and businesses. Concrete lifting eliminates these risks and creates a smooth, level surface without needing costly reconstruction.

How to Choose a Professional Concrete Lifting Service in Calgary

Not all concrete lifting services are the same. Choosing the right company ensures a durable, long-lasting solution. 

Here’s what to look for:

• Experience & reputation – Work with a company that has a proven track record and positive customer feedback.
• Materials & technology – Ensure they use high-quality polyurethane foam for the best results.
• Warranty & service guarantees – A good provider stands behind their work with warranties and long-term support.

Sunny South Inc. is a trusted leader in concrete slab lifting in Calgary. 

With decades of experience, top-tier materials, and a commitment to quality, we provide affordable, warrantied solutions for residential, commercial, and industrial projects.

Get Expert Concrete Lifting with Sunny South Inc.

Concrete lifting is the smarter, cost-effective alternative to slab replacement. It’s fast, durable, and eliminates safety hazards. Polyurethane lifting outperforms mudjacking with its lightweight, long-lasting, and minimally invasive approach.

Choosing experienced professionals ensures a successful, warrantied repair that lasts for years.

At Sunny South Inc., we specialize in slabjacking, concrete raising, and leveling using industry-leading polyurethane technology. We proudly serve Calgary and surrounding areas and offer reliable solutions for homeowners and businesses.

Contact us today for a free estimate.