If you’ve started looking at fixes for your sunken concrete, you may have come across the terms mudjacking and polyurethane. So what is the difference and why would you want to choose one over the other. Dalinghaus Construction strongly believes that polyurethane lifting is the preferred method for a variety of reasons.


Mudjacking is a term that has been utilized for years to describe the method of raising sunken concrete. The mudjacking method consists of drilling a 2-inch hole, about the size of a baseball, through the concrete slab. Once the hole has been drilled, the concrete mud is mixed in a hopper typically attached to a large dump truck. Once the material is mixed, it is then pumped through a large hose to a nozzle that is pressed into the previously drilled hole. The material is pumped at a rate until the slab is lifted to its desired position.


Polyurethane lifting is essentially the same process but on a much more efficient level. The holes that are drilled through the concrete are 5/8” in diameter or about the size of a penny. The polyurethane material is two separate components that are in the back of an enclosed truck. A hose is then run from the pump on the truck to the area in which is needing to be raised. The gun for the polyurethane lifting is where all the magic happens. That is where the two materials are first introduced and in turn create a reaction that produces the polyurethane. The material is pumped under the slab at a rate until the desired position is obtained, much like the mudjacking option.


Some of the advantages of the polyurethane lifting procedure by far outweigh the mudjacking process. First, the size of the hole that is drilled is a fraction of the size of the hole for the mudjacking procedure. The size of the equipment required to drill through for the mudjacking method is a large jackhammer drill that is typically gas-powered. The drill for the polyurethane method is a standard electric hammer drill.

The next benefit of polyurethane lifting is that the polyurethane foam won’t shrink once you have injected it. The mud from the mudjacking will eventually shrink once the concrete/mud mixture cures.

Lastly, the largest benefit of polyurethane lifting versus mudjacking is the polyurethane foam’s weight compared with the weight of the mud slurry. The soil has already shown that it isn’t dense enough to even hold the weight of the concrete slab. Now you’re going to add the weight of the mud slurry on top of that? That is just asking for the soil below the concrete to sink even more. The soil is the real reason that concrete slabs and houses settle. It’s typically not the concrete that fails, but the material/soils that the concrete is poured onto.


If you have a concrete slab that is sinking or is uneven, give Dalinghaus Construction a call today. A sunken slab can be unsightly or a tripping hazard, in addition to not allowing water to drain away from the foundation correctly. Let us make your slab level and our polyurethane lifting method allows you to use the slab almost immediately. Contact us to learn more about polyurethane lifting.

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Justin Sexton

Justin joins the Dalinghaus Construction family with a significant background in logistics and project management. He joined the team in early 2017 as a foundation inspector, but quickly transitioned towards a marketing role. He now manages the marketing department and creates everything that you see from us digitally.

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