What Causes Outdoor Concrete To Sink?

If you have noticed that your concrete patio or driveway in North Charleston is sinking, there’s a good chance something has changed in the soil beneath your concrete.

At CNT Foundations, our expert staff will come to your home and evaluate your individual situation, providing you with a free, no-obligation estimate to repair the damage. If you choose to work with us, you can rest assured that our solutions will provide long-term benefit, preserving your home for the next generation. What actually causes concrete to sink in the first place? The answers vary.

The concrete may be too heavy for the soil.

All soil has a maximum amount of weight that it can hold and concrete is heavy! When the concrete on top of the soil exceeds the weight bearing capacity of the soil beneath it, the soil will begin to compact. Over time, the concrete slab will begin to sink, either as a whole or in certain areas which can cause uneven surfaces. That’s not the only reason.

Soil containing silt and clay is constantly changing

Much of the soil in North Charleston contains clay. This is particularly true if your home is in the Piedmont Plateau, which is roughly one-third of the northwest part of South Carolina. This type of expansive soil is directly impacted by the weather. When it rains, the clay expands, pushing up anything that is on top of the soil. Conversely, when it’s dry, the clay shrinks and the concrete on top of the soil will sink. That’s not the only cause.

Soil erodes over time

As water moves through the soil in North Charleston, the dirt begins to erode and move with the water. This can cause uneven levels of soil beneath your concrete, which leads to sinking concrete.

What should I do if my concrete is sinking?

There may be a couple of options if you notice that your concrete is sinking. Our experienced staff will be able to determine if the best solution will be to replace or simply repair the concrete slab. Call 843-405-7022 today to schedule an appointment with one of our local North Charleston foundation experts. We’ll provide you with a free estimate and sound advice on repairing or replacing your sinking concrete. Let us focus on providing the right solution so that you can focus on the more important things in life.