You have a few options when you’re trying to determine how to repair uneven concrete. These options work differently for different people. That means depending on your individual situation, you may need something different. When you contact JES, an expert can tell you the best solution for you and your home.
What can you do to lift your uneven slab? These are the three most common methods of uneven concrete repair.
Pressure grouting, also called mudjacking and slabjacking, is the most traditional method of lifting a sunken slab of concrete. With this method, the construction crew mixes a slurry of concrete and filler material, traditionally mud, and then they inject it underneath the uneven concrete through soda can-sized holes that they have drilled.
As you can probably imagine, this is a very invasive and difficult method of supporting concrete slabs. It can take up to two weeks for the slurry mixture to cure, during which you can’t walk or drive on it. Plus, it doesn’t always raise the entire slab and tends to have a hard time raising the edges. Because of these difficulties, JES doesn’t recommend it for residential homes.
If your uneven concrete has deteriorated to the point where there are significant cracks in the surface, you might have no choice but to opt for concrete replacement. With this method, an expert removes the existing concrete and pours it again from the beginning.
This is also not ideal. In some areas, if the concrete supports a significant amount of weight, the process may need to move forward very slowly, and it can be expensive to accomplish. If you’re able to fix the problem before those cracks form, you can avoid the frustration of concrete replacement.
Polyurethane Foam Injection
Polyurethane foam injection is a unique method of uneven concrete repair. That’s because it’s a very lightweight mixture that gets pumped underneath the concrete through penny-sized holes. Once inside, it expands up to 25-35 times its original size, then cures in around 15 minutes. It’s also lightweight, weighing around 5% of what pressure grouting slurry does.
This is the method that JES prefers to use for uneven concrete repair. It’s quicker, easier and less invasive than pressure grouting, and it’s much more accessible than full concrete replacement. Plus, it’s time-tested. Even the Department of Transportation has trusted it for more than 30 years, using it for roads and other concrete structures.