If you’re dealing with uneven concrete you’ve probably been told you have two options: lift it or replace it. At first glance, replacement sounds like the safer choice. Tear it out, start fresh, and you’re done, right? Not necessarily.
In many cases, polyjacking can solve the same problem faster, at a lower cost, and with far less disruption.
At Pro Foundation Technology, we help homeowners make this exact decision all the time. The right choice depends on the condition of your concrete, what caused it to sink, and what you want long-term.
Polyjacking (also called polyurethane foam lifting) is a method used to lift and stabilize sunken concrete.
Instead of tearing out the slab, we drill small holes and inject a lightweight expanding foam beneath the concrete. As the foam expands, it fills voids and gently raises the slab back into place.
Once the foam hardens, it provides stable support underneath the concrete, helping prevent future settling. This method is widely used for driveways, sidewalks, patios and garage floors
The key advantage is that it fixes the underlying issue (voids or unstable soil) without removing the existing concrete.
Concrete replacement is exactly what it sounds like. The existing slab is broken up, removed, and hauled away. Then a new base is prepared, and fresh concrete is poured in its place.
This approach is necessary when the concrete is severely damaged—such as:
Replacement gives you a brand-new surface, but it comes with more time, cost, and disruption.
Before comparing solutions, it’s important to understand what actually causes the problem. Concrete doesn’t sink on its own. The soil beneath it changes.
Most cases of sunken concrete are caused by:
When the soil underneath loses support, the concrete follows it downward. This matters because the best solution is the one that addresses that underlying issue, not just the surface.
The real difference between these two approaches comes down to philosophy. Polyjacking restores what you already have, while replacement removes everything and starts over. That distinction affects everything else: cost, time, durability, and disruption.
One of the biggest differences homeowners notice right away is how long each option takes. Polyjacking is fast. Most projects are completed in a few hours, and the surface is often ready for use the same day.
Concrete replacement, on the other hand, is a multi-step process. It includes demolition, removal, base preparation, pouring, and curing. While the installation may take a few days, the concrete itself can take weeks to fully cure and reach strength. If you’re trying to minimize downtime, polyjacking has a clear advantage.
Cost is another major factor.
In most cases, polyjacking is significantly more cost-effective than replacement. It can cost 50% to 80% less than tearing out and replacing the slab, because:
Replacement includes all of those steps, which adds up quickly. That being said, cost alone shouldn’t drive the decision. The key is whether your existing concrete is still structurally sound.
A common concern is whether polyjacking lasts as long as replacement. In many cases, it does.
Polyurethane foam is lightweight, waterproof, and resistant to erosion. It fills voids completely and doesn’t add additional stress to the soil beneath the slab. Because of this, it often provides long-term stability, especially when the underlying drainage or soil issue is addressed.
Replacement can also be durable, but only if the new base is properly prepared. If the same soil conditions exist, even new concrete can eventually settle again. This is one of the most important points homeowners overlook: replacing the slab doesn’t fix the soil underneath it.
Polyjacking is typically the better option when the concrete itself is still in good condition. If the slab is intact but uneven, lifting it is usually faster, cleaner, and more cost-effective than replacing it.
It works especially well when:
In these cases, polyjacking restores the surface and stabilizes the base without starting from scratch.
There are situations where concrete replacement is the right choice, even when lifting options like polyjacking are available. The key factor is the condition of the slab itself.
If the concrete is severely damaged, such as cracks running all the way through, widespread crumbling, or clear structural failure, lifting won’t provide a reliable fix. In these cases, the slab has lost its integrity, and restoring it isn’t practical.
Replacement is also the better option when the original slab was poured too thin, when there’s significant surface deterioration across large areas, or when you need to change the layout or design entirely. These aren’t just surface-level issues, they point to limitations in the existing concrete that lifting can’t correct.
In these situations, starting fresh with new concrete is the most dependable way to ensure long-term performance and stability.
One of the most common mistakes we see is choosing replacement when it’s not necessary. Many homeowners assume that sunken concrete must be replaced. But in reality, if the slab is structurally sound, lifting is often the better first option.
Another mistake is ignoring the cause of the settlement. If water runoff, drainage issues, or soil instability aren’t addressed, the problem can return, even after repair.
That’s why at Pro Foundation Technology, we focus on why the concrete moved, not just how to fix it.
Polyjacking isn’t just about leveling concrete, it’s part of a larger strategy. Good foundation maintenance involves controlling water, stabilizing soil, and preventing movement over time.
Because polyjacking fills voids and reinforces the soil beneath the slab, it helps reduce future settlement and improves overall stability. When combined with proper drainage, it can extend the life of your concrete significantly.
One of the reasons homeowners prefer polyjacking is how straightforward the process is.
The steps typically include:
The entire process is clean, efficient, and minimally invasive. Compared to demolition and re-pouring, it’s a much simpler experience for most homeowners.
There’s no universal answer, but there is a clear pattern.
If your concrete is structurally sound, polyjacking is usually the better choice. It’s faster, more cost-effective, and addresses the underlying issue without unnecessary demolition. If your concrete is severely damaged, replacement is the right move.
Choosing between polyjacking and concrete replacement goes further than cost, it’s about making sure the solution actually fits the problem.
At Pro Foundation Technology, we evaluate the condition of your concrete, the soil beneath it, and the factors that caused it to settle in the first place. From there, we recommend the solution that gives you the best long-term result, not just the quickest fix.
If you’re dealing with uneven concrete and not sure which direction to go, we can help. Contact Pro Foundation Technology today to schedule an evaluation and find out if polyjacking is the right solution for your home.