Answer: It is the heaving soil that is causing the problem so you may need to excavate the area beneath the birdbath and fill it with gravel. The gravel will have enough space between the rocks to keep the entire area from heaving and making the water spill from the birdbath. After setting the gravel and making it level, place the circle stones on top and then set your birdbath on top of the circle stones. I think it will make a difference. Best wishes with your birdbath!
Q&A Library Searching Tips