What Causes Concrete to Sink?
These are the main causes of sinking concrete:
Insufficient Soil Compaction
When soil isn’t packed well during construction, it can cause concrete to sink. This is because improper soil packing leaves too much air in the ground, making it weak and incapable of supporting the weight of concrete.
If stormwater isn’t effectively managed, it can direct water toward your home’s foundation instead of away from it. Water that seeps into the ground and under your concrete can erode the soil. As a result, the foundation becomes unstable, and the concrete can start sinking.
When there’s lots of ground shaking caused by nearby construction, heavy traffic, or even airplanes, concrete can start to sink. These powerful vibrations shake up the soil and fill it with air, which makes it less stable.
Bad drainage can also lead to sinking concrete. Water from burst, cracked, or improperly connected pipes in your home can accumulate under your concrete slabs and floors. This can over-saturate the soil, making it weak and unstable.