How to Fix Erosion Under Concrete

If you have ever seen concrete that is crumbling and looks like it’s been eroded, you’re not alone. But unfortunately, many people wonder what they can do to fix the problem. The good news is that there are several ways to fix erosion under concrete, and most of them are fairly easy to do.

How to Fix Erosion Under Concrete

Erosion is a common problem that can occur under concrete slabs. It is often caused by water or weathering and can lead to several issues, such as cracks in the concrete, uneven surfaces, and even sinkholes. If left unchecked, erosion can eventually cause the concrete to collapse.

There are several ways to fix erosion under concrete, and the best method will depend on the severity of the problem. For minor erosion, you may be able to repair the damage with a concrete sealer or patching compound. If the damage is more severe, you may need to replace the affected area with new concrete.

This blog post will discuss some of the most common methods for fixing this problem. We will also provide a few tips on how to fix erosion under concrete in the first place.

Summary: If you have concrete that is slowly wearing away, there are a few things you can do to try and fix the problem. One option is to add a layer of sealant to the concrete to help protect it from the elements. Another option is to add a layer of rebar to the concrete to help strengthen it.

Things You Will Need

  • Concrete sealer or patching compound
  • Shovel
  • Trowel
  • Water hose
  • Plywood
  • Concrete mix
  • Wheelbarrow
  • Tamper

10 Ways on How to Fix Erosion Under Concrete:

1. Identify the Problem Areas:

The first step is to identify problem areas by looking for cracks, discoloration, or spalling on the surface of the concrete. These are all signs of erosion happening underneath the concrete. Next, the problem areas will need to be repaired to prevent further damage.

 identify the problem areas

2. Check the Drainage:

Identifying problem areas is only the first step. You also need to check the drainage around the concrete to ensure that water isn’t pooling and causing further damage. If you do find water pooling, you’ll need to redirect it away from the concrete.

3. Determine the Cause of the Problem:

There are a few reasons why concrete can start to erode. One of the most common reasons is because of water damage. If water seeps into the concrete, it can cause it to break down over time. Another common reason for erosion is because of chemicals. If chemicals come into contact with concrete, it can cause it to break down. If you’re unsure what is causing the erosion, you should contact a professional.

4. Remove the Damaged Concrete:

If there’s a problem with the concrete, you need to figure out what caused it. Then you have to take out the part of the concrete that’s damaged. You can do this by hitting it with a hammer or chisel. But you have to be careful, because the concrete can be sharp and it might hurt you.

5. Clean the Area:

Once you have removed the damaged concrete, you will need to clean the area. You can do this by using a power washer or a garden hose. Be sure to remove all of the debris and dirt from the area. Use a wire brush to remove any stubborn dirt or debris. If you are using a power washer, be sure to use the lowest pressure possible. After cleaning the area, you will need to let it dry completely before continuing with the next step.

6. Prep the Area:

After you have cleaned the area, you will need to prep it for repair. It includes creating a smooth surface. You can do this by using a concrete grinder or sandpaper. Try to make the surface as even as possible.

7. Mix the Repair Material:

Now it’s time to mix the repair material. Again, you will need to follow the instructions on the packaging. Once it is mixed, apply it to the affected area. Be sure to smooth it out to level with the rest of the concrete. If you need to, use a trowel to do this.

7. Let it Dry:

Now you will need to let the repair material dry. It usually takes around 24 hours. Once it is dry, you can add a sealant to the area. This will help to protect the repair and prevent future erosion. Use a brush or roller to apply the sealant evenly over the repair area. Let it dry completely before walking or driving on it.

8. Add Some Gravel:

Adding some gravel to the area around the repair can help to prevent future erosion. Use gravel that is similar in color to your concrete, so it does not stand out too much. Spread a layer of gravel over the area and then use a garden hose to wet it down. This will help to hold the gravel in place and keep it from being washed away by rain or runoff.

Adding some gravel to the area

9. Add Some Plants:

Plants can also help to prevent erosion by holding soil in place. Choose plants that are native to your area and that are known to be good at preventing erosion. Some examples include:

  • Creeping phlox
  • Sedum
  • Stonecrop
  • Wooly thyme

10. Use a Concrete Sealer:

Applying a concrete sealer is another great way to prevent water from seeping into your concrete and causing erosion. Concrete sealers will also help to protect your concrete from salt, sunlight, and other elements that can cause damage.

When choosing a concrete sealer, be sure to choose one that is specifically designed for outdoor use. Applying a sealer is a fairly simple process, but be sure to carefully follow the package’s instructions.

You Can Check It Out to Fix a Sinking Grave

Step by Step Process on How to Fix Erosion Under Concrete:

Step 1. Determine the Source of the Erosion.

The first step in fixing erosion under your concrete slab is to determine the water source that is causing the erosion. If you have gutters in your home, make sure that they are clean and free of debris. Check for any cracks in your foundation or around your windows and doors.

Step 2. Divert the Water Away From the Area.

Once you have determined the water source, you need to take steps to divert it away from the problem area. This may involve installing gutters and downspouts, grading the ground around your foundation, or redirecting runoff with drain pipes. Waterproofing the area can also help to keep water from seeping into the ground and causing erosion.

Step 3.Install a Drainage System.

If water is already pooling around your foundation, you need to install a drainage system to remove the water before it can cause any more damage. There are two main types of drainage systems:

you need to install a drainage system
  • Interior drainage systems are installed inside your foundation and collect water as it seeps through your basement walls. This water is then pumped out of your home to keep it from flooding.
  • Exterior drainage systems are installed around the outside of your foundation and collect water before it has a chance to seep through your basement walls. This water is then directed away from your home so that it can’t cause any damage.

It would be best if you also made sure that any gutters and downspouts on your home are in good working condition so that they can properly direct water away from your foundation.

Step 4. Repair Any Damage.

If the erosion has already caused damage to your foundation, you will need to have it repaired as soon as possible. Small cracks can be filled with hydraulic cement, while larger ones will require the help of a professional.

If the erosion is severe, you may need to have your foundation reinforced or even replaced. Again, this is a job best left to the experts, as it is a very complex process.

Step 5. Prevent Future Erosion.

Once you have repaired the damage caused by erosion, it is important to take steps to prevent future erosion. One way to do this is to make sure that your concrete is properly sealed. Applying a sealant will help create a barrier between the concrete and the elements, which can help reduce the risk of erosion in the future.

Another way to prevent erosion is to make sure that any areas of your concrete that are exposed to water are properly drained. This can help reduce the amount of moisture that can seep into the concrete, which can help prevent erosion from occurring.

If you are concerned about erosion on your property, there are a number of ways that you can take to prevent it. By taking steps to repair any damage caused by erosion and preventing future erosion, you can help keep your property looking its best.

Tips and Warnings


1. The best way to fix erosion under concrete is to use a product that will bind the soil together and prevent water from seeping through.

2. Be sure to follow the manufacturer’s instructions when using any type of binding agent.

Any Type of Binding Agent

3. It is also important to make sure that the area around the foundation is properly graded so that water will flow away from the house.

4. If you have any questions or concerns, be sure to consult with a professional before beginning any work on your home.


  1. Do not try to fix erosion under concrete by yourself if you are not experienced in this type of repair.
  2. Make sure that you wear proper safety gear when working with any chemicals or binding agents.
  3. Be sure to dispose of all materials properly when you are finished with your repairs.

Frequently Asked Questions

Why is My Concrete Eroding?

Concrete can deteriorate for a number of reasons, but the most common reason is moisture. Moisture causes concrete to soften and eventually fall off the structure in which it’s installed. This happens because water penetrates through the concrete’s pores and causes deterioration at the molecular level. Additionally, bacteria love moist environments, so water damage becomes rampant very quickly.

To prevent this from happening, make sure to seal your cracks and joints with a durable sealant like a waterproofing compound or caulk every time you mop or sweep your floor.

What Happens if You Don’t Put Gravel Under Concrete?

If you don’t put gravel under concrete, the concrete will eventually push the gravel out from beneath it, causing your driveway to become a mud pit. Not only will this be a hassle to deal with, but it will also damage your car if it gets stuck in the mud.

Should You Put Plastic Under Concrete?

The verdict is still out on whether or not you should put plastic under concrete. Some professionals believe that this practice can be harmful to the environment, while others argue that it can help reduce noise and odor emissions. So far, there isn’t enough evidence to determine which side is right.

What we do know is that if you are going to use plastic under your concrete slab, make sure that it’s properly sealed and protected from exposure to moisture and sunlight. Additionally, make sure that the plastic isn’t press-fit into the subsurface – instead, allow for some give so air can circulate freely beneath the sheeting.


Erosion is a huge problem for homeowners, municipalities, and businesses. It can cause extensive damage to concrete structures and lead to costly repairs. There are several ways to fix erosion under concrete, but the most effective method depends on the severity of the erosion and the type of soil involved. In this post, we’ll discuss some of the most common methods used to fix erosion and provide tips on how to fix erosion under concrete.

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