Mudjacking is an old fashioned method for leveling concrete. It involves drilling a series of holes throughout the concrete slab, and a cement slurry, or mud, is pumped beneath the slab to fill in the void and attempt to lift the slab.
One of the biggest drawbacks to this approach is that the high-pressure grout is very messy. It is not uncommon for the cement slurry to spew out of the holes and cracks in the slab, making a huge mess that is almost impossible to clean up. Mudjacking also requires that large holes (1.5 – 2 inch) be cored in the slab making it obvious that a repair was completed.
Another thing to consider is that the cement slurry used for mudjacking is heavy (100lbs per cubic foot) and adds a significant amount of weight to the soil that supports the slab. The additional weight can make the problem worse causing future settlement.
The cement slurry in mudjacking also takes several days to cure, meaning that you can’t drive or walk on it for several days after it’s installed.
In order to replace concrete, the existing concrete slabs must first be removed. Typically a jackhammer is used to break the existing concrete slabs into pieces. And then all of those chunks of concrete are hauled away.
In the case of interior slabs, all of the home furnishings, floor coverings and interior partition walls must first be removed. Then a new floor is poured and allowed to cure for at least two weeks. Then interior partition walls can be re-built, floor coverings re-installed, and home furnishings brought back in.
The solution is obviously disruptive and expensive, but the real problem is that it doesn’t address the issue. The concrete slab isn’t the problem; the soil supporting the slab is the problem. When you install a new concrete slab over the same troublesome soil, so you can expect that your new slab will sink just like the old one.
Another problem that people often forget to consider is that the colour of the new concrete doesn’t match the colour of the original concrete. This creates a major eye sore around your property, Additionally, it takes several weeks for new concrete to cure, meaning that you cannot drive or walk on it for several weeks after it’s installed.
Adding a layer of concrete topping is only a temporary repair. The materials under your slab have settled and adding extra weight will often make it worse.
|Ready to support traffic in 30 minutes or less|
|Waterproof subgrade that will not wash out|
|Clean installation – no dust, grout overflow, or concrete splatter|
|Uniform appearance – Minimal patchwork or discolourations|
|Addresses thin / brittle and severely broken slabs|
|Precise lifting capability (reduce risk of over lifting)|