Abstract: A bird bath assembly adapted to mount on an existing structure such as a deck or patio. The bird bath assembly includes a gasket member which is placed between the deck structure and a shallow dish-like liquid container of the assembly, and a screw and washer assembly for securely and rigidly fastening the container to the existing structure. Once installed, the gasket member functions to remove irregularities present in the surfaces of both the existing deck structure and the container and thereby makes a wide variety of container designs, constructed from clay or other like materials, available for mounting in an effective and attractive manner.