Will Polyurethane Concrete Lift Cause Damage to My House

Have you noticed that the concrete around your home is uneven or sinking?

Whether it’s your driveway, patio, or garage floor, uneven or sunken concrete is a common issue and usually not a cause for concern. Homeowners who require foundation repair in Hattiesburg MS are leaning toward polyurethane lifting—also known as poly jacking or foam jacking—as it’s a modern, minimally invasive solution for raising and leveling slabs. But one question customers often want to know is, “Will this process damage my home?” It’s a great question that we address below in more detail.

How Does Polyurethane Concrete Lifting Work?

In polyurethane lifting, technicians inject an expanding, high-density foam beneath a sunken concrete slab. The process is simple and straightforward, starting with tiny holes (about the size of a penny) drilled into the slab. A two-part polyurethane mixture is injected through these holes, and as the components mix underground, they expand into a foam.

This expanding foam then lifts the slab back into its correct position. The small injections are filled with a patching compound, creating a smooth surface. Most projects take a couple of hours to complete depending on the size and complexity of the project, and the foam cures and hardens in about 15 minutes. This method is a far better approach than a traditional concrete slab removal.

Common Concerns About House Damage

Even though polyurethane foam lifting is generally a safe process, it’s normal to have questions and concerns about potential damage to your property. Let’s address them below.

Structural Integrity

Will the expanding foam crack or destabilize your foundation or any part of the house? No. Polyurethane foam is designed to expand only within the voids beneath the slab. The technicians from Foremost Foundations and Construction will carefully monitor the injection to ensure the slab is lifted gradually and evenly.

Because the high-density foam is controlled, the chance of it exerting undue force on surrounding structures is minimal. And, when poly foam is used for sidewalks, driveways, and other non-load-bearing slabs, there’s little to no impact on the home’s foundation.

Drilling Holes in Concrete

Homeowners often have concerns about us drilling holes into their concrete and how that might weaken it or lead to cracks over time. The good news is that polyurethane concrete lifting requires far fewer and smaller injection holes than older methods. These small holes are around ⅝” to ¾” in diameter and typically filled with a patch material that bonds well with the surrounding concrete. Once sealed, the structural integrity of the slab is preserved.

Potential Chemical Hazards

Another concern that homeowners have is whether the foam is toxic or harmful where it comes into contact with the soil around the home. The polyurethane foam used in concrete lifting is a closed-cell material, meaning it won’t absorb water. As long as it’s handled correctly, the material will not pose a significant risk to soil, groundwater, or air quality. You can also count on our professionals to follow safety protocols to ensure proper mixing, ventilation (if working indoors), and cleanup.

Why Polyurethane Lifting Is Generally Safe

Poly foam is generally considered very safe, which is why we highly recommend using this approach whenever possible. It’s lightweight but strong, adding negligible weight under the slab compared to other methods like mudjacking. Less weight means less stress on the soil and slab. Modern equipment also allows technicians to inject foam in measured amounts so that the slab lifts gradually, controlling its expansion. Additionally, this process is quick and requires little cleanup. There are fewer, smaller holes to patch and less risk of damage to your landscaping.

Schedule Foundation Repair in Hattiesburg MS

Polyurethane concrete lifting is a safe and effective method for leveling sunken concrete without damaging your home. By using a lightweight, controlled-expansion foam, this process delivers a strong, lasting solution that’s far less invasive than older techniques. As with any home improvement project, the key is to hire experienced professionals who understand local soil conditions and follow industry best practices.

Have more questions about whether polyurethane lifting is right for your property? Reach out to Foremost Foundations and Construction for an inspection. Our experts will assess your specific situation and guide you toward the most reliable and long-lasting fix for your uneven slabs.