The answer to 'why is my retaining wall erosion' is that there are several common causes, including poor drainage, soil erosion, and improper construction. Retaining wall erosion can lead to cracks, leaning, or even complete failure of the wall, which can be dangerous and costly to repair.
Some of the key symptoms of retaining wall erosion include water pooling behind the wall, soil or debris washing out from behind the wall, and visible cracks or gaps appearing in the wall. If you notice any of these signs, it's important to address the issue promptly to prevent further damage.