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Polyjacking vs Mudjacking: Which Is Best?

For homeowners looking for concrete lifting solutions, it can be difficult to know whether to opt for polyjacking or mudjacking. Each has numerous strengths and advantages—but which is truly the best option? 

This page will provide insight into the difference between mudjacking and polyjacking, as well as their advantages and disadvantages. 

What is Mudjacking? 

Mudjacking, also known as slab jacking, is a technique used to raise and stabilize sunken or uneven concrete slabs.  

It works by first drilling small holes (about the size of a pop can) into the sunken concrete slab at strategic locations. A mud slurry, consisting of a combination of water, soil, cement, and sometimes additional additives like sand or fly ash, is pumped through the drilled holes beneath the concrete slab.  

As the slurry is pumped beneath the slab, it fills voids and creates pressure, gradually lifting the sunken concrete to its original position. The process is carefully monitored to ensure even lifting and proper alignment of the slab. 

While this is considered a cost-effective method, it often requires a longer curing time than polyjacking and offers only a temporary solution, especially in the case of severe settlement and structural damage. 

What is Polyjacking? 

Polyjacking, also known as polyurethane concrete lifting foam, is a method used to raise and stabilize concrete slabs that have settled or sunk due to soil erosion, poor compaction, or other factors. Here’s how polyjacking works: 

  • Injection of Polyurethane Foam: A two-part polyurethane foam is injected beneath the settled concrete slab through small holes drilled into the surface. The foam is typically a high-density, expanding material that displaces air and compacts the soil beneath the slab. 
  • Expansion and Lifting: Once injected, the polyurethane foam expands to fill voids and lifts the concrete slab back to its original position. The foam’s expansive force raises the slab evenly, providing precise control over the lifting process. 
  • Stabilization: In addition to lifting the concrete, the injected foam stabilizes the underlying soil, helping to prevent further settlement or erosion. This stabilization is crucial for maintaining the integrity and longevity of the repaired surface. 
  • Minimal Disruption: Polyjacking is a minimally invasive process that requires drilling small holes (about the size of a penny) into the concrete surface. This results in minimal disruption to the surrounding area and allows for quick and efficient repairs. 
  • Immediate Use: Unlike traditional mudjacking techniques that may require extended curing times, polyjacking allows for almost immediate use of the repaired surface. Once the foam has expanded and the slab has been lifted, it can typically be used right away. 

Overall, polyjacking is beneficial for lifting concrete slabs that have sunk due to issues like soil erosion. It also offers numerous advantages over mudjacking. 

Advantages of Polyjacking Over Mudjacking 

Polyjacking offers several advantages over traditional concrete repair methods, including: 

  • Cure time: The polyurethane foam cures faster than mudjacking and requires minimal downtime. 
  • Lightweight material: Since the foam is lighter weight than the mud slurry used in mudjacking, it exerts less pressure on underlying soil, reducing the risk of further soil compaction or damage. 
  • Longevity: Polyjacking repairs are generally more durable and long-lasting compared to mudjacking. The polyurethane foam used in polyjacking is resistant to moisture, chemicals, and microbial growth, ensuring the integrity of the repair over time. 
  • High load-bearing capacity: Polyurethane foam used in polyjacking has excellent compressive strength and can support heavy loads. This makes it suitable for a wide range of applications, including industrial and commercial projects where heavy equipment or machinery may be present. 
  • Environmentally friendly: Polyurethane foam is non-toxic and inert once cured. It does not pose a threat to groundwater or soil quality, making it a safer option compared to some materials used in mudjacking. 

Overall, polyjacking is a cost-effective and efficient solution for repairing settled or uneven concrete surfaces, providing durable and reliable results for both residential and commercial applications. 

Trust Groundworks for Your Concrete Lifting Needs 

Whether it’s your pool deck, driveway, sidewalk or porch, Groundworks has the solution for you. We offer our PolyRenewal™, a polyurethane injection system that provides a quick, effective, and durable method. Reach out to the concrete lifting professionals at Groundworks and schedule a free inspection.

Leah Leitow

Leah Leitow

Content Writer

Leah is a Content Writer for Groundworks with nearly ten years of experience working in the foundation repair industry. Her experience ranges from working with homeowners to find the right solution to training inspectors and staff. In her background as a Michigan journalist, she gained invaluable insight into people's lives throughout our state. Leah lives in metro Detroit with her husband and two sons.