Leduc County, Alberta

(780) 446-9349

Leduc County, Alberta


Why Polyurethane Vs. Mudjacking?

If you are thinking of fixing your concrete that may be sinking, mudjacking is probably an option you are considering, but you may be wondering if there are any newer or better methods available out there today.
Mudjacking has been around for over 70 years now. It uses a specific technique to lift and level sunken concrete by pumping a mixture of sand and cement or soil below the slab through holes drilled in from above. The pressure from the hydraulic mudjacking machine forces the slab to rise based on how much of the mixture is pumped in.  

Mudjacking is effective, however, it does come with its own downfalls that owners should consider before going ahead with this procedure.
A. Material Breakdown: The material used in the mudjacking process is not waterproof and therefore, not ideal for northern climates that see a lot of snow. As water seeps below the concrete during thaw cycles, the sand, cement, and soil material may begin to shrink and erode. This breakdown of the material may cause the foundation to sink even more, especially if the area does not have proper drainage or if the area contains cracks or joints that were improperly sealed, to begin with. Any water under the concrete is a recipe for trouble.  
B. Weight: When using the process of mudjacking, the mixture pumped below the concrete will become rock hard after 24 hours. In most cases, this is what you want, however, if the base below is poor, which is what usually caused the concrete slab to settle, to begin with, the added heavyweight of the concrete will only cause the slab to sink even more over time.  
C. Large Holes: In the process of mudjacking, larger holes are drilled into the original concrete to allow for the new mixture to be pumped in below. Not only can this be an eyesore, but these large holes can also cause cracking to occur as they compromise the structural integrity of the concrete.  

A Better Repair Option: Polyurethane Foam Raising

In the early 1980s engineers for provincial and federal transportation began using polyurethane and injecting this high-density material below sunken roadways. This modernized method was chosen over the more traditional mudjacking since polyurethane was discovered to be more lightweight and more durable. In addition, polyurethane takes only minutes to cure as opposed to the 24 hours wait time with mudjacking, a huge benefit for the area of transportation and roadways. Over the next several years. the process of using polyurethane was patented and used solely by one company and exclusively for major projects and highways.  
In the early 2000s, the patent for the use of polyurethane in this manner expired and this very effective process is now available for use by all contractors. The obvious outcome is that both the process and the material can now be used on residential projects such as patios, garage floors, driveways, and walkways. Not only is it a structurally sound option, but it is also very economical. Polyjacking is now the option of choice for the raising and levelling of all concrete. Not only is it longer lasting than mudjacking, but the smaller injection holes and quicker return to service make it the obvious better choice.