The answer to 'why is my deck erosion' is that deck erosion is typically caused by weathering, water damage, and soil movement. Over time, exposure to the elements like rain, sun, and wind can cause the wood to rot, warp, and break down. Improper drainage or water pooling around the deck can also lead to erosion of the soil and foundation. Additionally, ground shifting and settling can cause the deck to become unstable and start to erode.
If you notice signs of deck erosion like uneven boards, loose railings, or cracks in the foundation, it's important to address the issue right away. Smaller DIY repairs like replacing damaged boards or reinforcing the structure may be possible, but for more extensive damage or safety concerns, it's best to call in a professional landscaping or deck repair company to assess the situation and provide the appropriate solutions.