How does concrete raising work?

Contact us to find out how we can use polyurethane to raise and stabilize your concrete — at a fraction of the cost of replacement.

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Benefits of Polyurethane Concrete Raising vs. Mudjacking

A plan which includes the controlled lift of a slab achieves a more precise result by applying expansive polymer foam just beneath the surface of the slab. This process eliminates the failing condition as well as seals and stabilizes all defective joints and sources of water penetration from further erosion. The variety of soils and substrates across the Front Range are often the root of the problem. Liftech’s system treats the soils and addresses the water and erosion issues. The average life cycle of concrete is extended at a fraction of the cost of replacement.

Until recently, mudjacking has been the method more commonly used for lifting fallen concrete and is still a widely acceptable form of restoration. Mudjacking and polyurethane achieve similar results, at least initially, however the process by which those results are achieved and the extended performance of the two products are completely different.

What is  Mudjacking?

Poly jacking benefits

Mudjacking uses a mixture of sand and water infused with a small amount of Portland cement which helps the material solidify. The sand and water mixture is pumped through pop can size (1-5/8 inch) holes in the concrete using hydraulic pressure to lift the sunken concrete. This mixture is considered a structural fill and is very heavy, weighing an average of 100-110 lbs. per cubic foot of material. In areas of wet and unstable soils, mudjacking material can add additional, unwanted weight and water to an already wet and failing substrate. In the likely event that there is moisture present in the area where the slurry mixture is placed, over time that slurry mixture may have a tendency to absorb the moisture, causing it to weaken, break down, sluff off, and eventually become part of the failure. Mudjacking can be an effective solution, but in some cases may only be temporary.

Liftech as an Alternative!

Polyurethane concrete raising consists of an environmentally safe liquid polymer foam that is injected through penny-size holes in the concrete and into the loose, unstable soils below.  Through a chemical reaction the high density foam expands to stabilize the loose soils and lift the fallen concrete. After approximately 15 minutes the polyurethane material is fully cured and ready to return to service. The polyurethane only weighs about 2 pounds per cubic foot of material which doesn’t add any additional, unwanted weight to an already failing substrate. Polyurethane foam is an inert, non-toxic, environmentally safe material that is made from 100% recycled materials. It is impervious to moisture or decay ensuring that over time will not only be environmentally friendly, but your repair will last a lifetime.

After the repair is completed, the small holes in the concrete where the material was injected need to be filled. Unlike the 2 inch holes drilled for mudjacking, Liftech’s polyurethane system utilizes a much smaller, 5/8″ hole (about the size of a penny), and those holes are filled with a cementious grout to match the surrounding concrete.

The Advantages of Liftech vs Mudjacking

    Polyurethane cures as a solid, impermeable structure which adheres to the concrete and is not susceptible to fracture or failure.
    Polyurethane is injected as a liquid and reacts within the loosely, uncompacted soils to solidify and stabilize those soils. 
    Liftech uses controlled injections in penny-size holes to raise your concrete quickly and effectively. Mudjacking requires much larger holes.
    Polyurethane weighs about 2 pounds per cubic ft. Mudjacking material weighs over 100 pounds per cubic foot, which adds a tremendous amount of weight to an already burdened substructure.
  • IT’S FAST!
    Polyurethane cures within minutes with your concrete ready to use again when we leave the job! Mudjacking can take days.
    Our system creates a barrier to moisture, chemicals, insects, rodents, additional ground movement and erosion.


Some Testimonials:

“I had a really badly cracked and uneven concrete patio. One of the larger cracks had almost an inch of offset and people would trip over it if not careful. Two of the larger sections were tilted toward the foundation, so any snow melt or rain that got to them would drain into the foundation. I had to prop my grill up with bricks and pieces of wood just to stabilize it. It was bad enough that I considered having the whole thing replaced. I thought I would give Liftech a try after talking to them at the Colorado Garden & Home Show, since they offered a considerably cheaper alternative to a tear-out and re-pour. I was expecting a big improvement, but frankly – I was blown away by the job they did. They leveled all of the sections, pitching everything away from the house. They did it fast, and without leaving any kind of a mess. I can easily fill-in the now-level cracks with sealant. It has gone from an awkward, difficult-to-use, and frankly- embarrassing liability to a nice functional patio. Worth every penny!” – Wolf B.

“Part of the basement slab has been sinking in my home and there are a few solutions to fix this. A number of years ago I had a reputable mud jacking company come out and lift the slab back up. While this was a successful process initially, the slab sunk back down within a couple of years. After doing research on alternatives I discovered the polyurethane raising process and decided to use Liftech. I was pleasantly surprised at the ease of this process and how professional and friendly the crew was. The injection holes are very small, there is no mess, it’s quick and it’s much more affordable than other options. I highly recommend Liftech for their technology, professionalism, promptness and great communication skills.” – Jerry W.

“The raising of our family room floor went very well and has held steady with no issues. Your pricing was also well below what mud jacking would have cost and I’m not sure that would have worked as well. Liftech’s method was less obtrusive to the floor than mudjacking also. Great product, great pricing, and a very professional job. I would recommend to anyone for flooring, driveway, porch steps, or any other cement raising project.” – Ray L.

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Concrete Repair vs Replacement
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