Why is Polyjacking a Better Option Than Traditional Mudjacking?
Polyjacking vs. Traditional Mudjacking
When compared with traditional mudjacking, polyjacking is the new kid on the block. It is quickly making a name for itself, though. Mudjacking costs less but is looked at as more of a temporary fix, whereas polyjacking is considered a permanent repair.
The method of traditional mudjacking involves drilling holes in your driveway or other surface and pumping a slurry mix underneath. The slurry is commonly made up of cement, mud, sand, and crushed limestone, which is mixed with water. The slurry flows under the concrete and the slab is raised until it is once again even with the rest of the driveway or patio. Once pumping is done, the holes are patched over.
Polyjacking is similar to the mudjacking application: holes are drilled into the slab that needs to be repaired but instead of a slurry mix, polyurethane foam is injected. The foam expands, filling the voids and raising the concrete to its required height. The holes that were drilled are patched over and you’re good to go in a fairly short amount of time.
Now you may be thinking to yourself that mudjacking is the least expensive option so that is probably the best way to go. However, there are a few more points you may want to consider before you make your decision.
Benefits of Polyjacking
As we learned above, both methods involve drilling insertion holes into your concrete. Polyjacking uses holes that are around 5/8″, or the size of a penny, whereas mudjacking holes can range from one to two inches, a sizeable difference. The foam expands between four to fifteen feet from the injection point. Due to the thickness necessary in the mudjacking slurry, it can only spread about a foot or two. So, not only are the polyjacking holes smaller, less of them are needed for the same coverage, fifty to seventy-five percent less, in fact!
We mentioned that mudjacking slurry is thicker than foam and it is also considerably heavier. A cubic foot of slurry weighs a hundred to a hundred and fifty pounds, which is a considerable amount since the same volume of polyjacking foam weighs around three to four pounds. If the underlying soil is already unstable, the weight from the slurry can cause more problems than it solves, as heavier mud can worsen existing problems.
Polyjacking foam expands under the concrete, filling any voids and stabilizing the soil underneath the slab. Due to the thickness of the slurry, it cannot accomplish the same thing. Although numerous holes are drilled to try and get a good spread of mud, completely filled voids are rarely achieved. Additionally, water can wash out the mudjacking slurry, leaving you with the same problem, or possibly a worse repair in the future. Polyjacking foam won’t wash out and is considered a permanent repair, not a temporary fix.
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