What is Foamjacking? A Simple Guide to Modern Concrete Lifting

Uneven or sunken concrete can be more than just an eyesore—it can pose safety hazards, reduce property value, and lead to costly long-term damage if left unaddressed. If you’ve noticed cracks in your driveway, patio, or basement floor, you might be wondering about modern solutions that are effective, fast, and minimally invasive.

One method gaining attention for its efficiency and durability is foamjacking. But what is foamjacking? In this article, we’ll walk you through everything you need to know—from how it compares to traditional methods, to how it works, and whether it’s a lasting solution.

Table of Contents:

• What is Foamjacking?
• Traditional Methods vs. Foamjacking
• How Foamjacking Works
• Is Foamjacking Permanent
• Conclusion

What is Foamjacking? 

Foamjacking, also known as polyjacking or polyurethane concrete lifting, is a modern, non-destructive method used to lift, level, and stabilize sunken or uneven concrete slabs. It’s a smart alternative to costly concrete replacement and is widely used for fixing sidewalks, driveways, garage floors, patios, pool decks, and even foundation slabs.

Instead of breaking up the concrete and pouring a new slab (which is expensive, time-consuming, and messy), foamjacking involves injecting expanding polyurethane foam beneath the surface. As the foam expands, it fills the empty space or void underneath the slab and gently pushes it upward to its original level.

Traditional Methods vs. Foamjacking

Before foamjacking, sunken concrete was typically repaired using mudjacking or complete slab replacement. While these methods can work, they have limitations that make foamjacking a more practical choice today.

• Mudjacking involves pumping a heavy slurry beneath the slab to lift it. It requires larger drill holes, adds weight to weak soil, and has a longer drying time.
• Concrete replacement means demolishing and repouring the slab entirely. It’s expensive, time-consuming, disruptive, and not always necessary.
• Foamjacking, on the other hand, uses lightweight expanding foam, needs only small injection holes, and sets quickly—making it faster, cleaner, and less invasive.

Here’s a quick comparison:

How Foamjacking Works

Foamjacking may sound high-tech, but the process is actually quite straightforward and efficient. It’s designed to lift sunken concrete with minimal disruption, using materials and methods that are both precise and long-lasting.

Here’s a step-by-step look at how it works:

1. Small holes are drilled

Technicians start by drilling small holes—usually less than ¾ inch in diameter—into the affected concrete slab. These holes are strategically placed to target the sunken areas.

2. Foam is injected underneath

 Through the holes, a specialized polyurethane foam is injected beneath the slab. This foam starts as a liquid, allowing it to flow into empty spaces or loose soil.

3. Foam expands and lifts the concrete

Once in place, the foam rapidly expands and hardens. As it expands, it lifts the slab gently and evenly from underneath, bringing it back to its original level.

4. The foam cures quickly

One of the biggest advantages is how fast the foam sets—usually within 15 minutes. This means the area can often be used again the same day, without long wait times.

5. Holes are patched

After the lifting is complete, the small holes are filled with a durable patching material, leaving a clean and finished surface.

This entire process is not only faster than traditional methods but also more precise. Because the foam is lightweight and doesn’t add pressure to the soil, it helps prevent future settling issues. It’s ideal for both residential and commercial projects where time, cleanliness, and durability matter.

Is Foamjacking Permanent

Foamjacking is known for being a long-lasting solution, but like any repair method, its durability depends on a few important factors. The polyurethane foam used is water-resistant, doesn’t shrink over time, and can hold its shape for many years. In most cases, once a slab is lifted and stabilized with foamjacking, it stays that way.

However, here are a few things to keep in mind:

• Soil conditions matter
  If the soil underneath continues to erode or settle—due to poor drainage, tree roots, or water flow—it can create new voids over time. Foamjacking addresses the slab, but it can’t fix ongoing soil movement.
• Quality of installation
  A properly done foamjacking job by experienced professionals will last much longer. The accuracy of the injection process and the quality of materials used play a big role in how well the repair holds up.
• Surface usage
  Driveways or garage floors that regularly bear heavy loads may experience more stress than a backyard patio. While foamjacking foam is strong, consistent heavy use may impact the long-term performance.

In general, when installed correctly and combined with good site conditions, foamjacking can last just as long—or longer—than traditional repair methods. Many homeowners enjoy results that hold up for 10–20 years or more.

If you’re looking for a long-term fix without the hassle of replacing concrete, foamjacking offers a reliable and efficient option.

Conclusion

Now that you understand what foamjacking is and how it compares to more traditional repair methods, it’s clear why so many homeowners and property managers are turning to it as a fast, clean, and long-lasting solution. Whether you’re dealing with a sinking driveway, uneven steps, or a cracked patio, foamjacking offers a smart alternative to full concrete replacement—without the mess or downtime.

If you’re noticing signs of sunken concrete around your home or business, don’t wait for the problem to get worse. Reach out to Ener-Spray today to explore whether foamjacking is the right fit for your property. Our team is here to walk you through the process, answer your questions, and help you restore safety and stability with confidence.