The Detached Walls Finder tool of the Finders group in the Project Process tool-set can help find all detached walls in the model.
After the ribbon button is clicked, the tool asks for what detachments to concern.
After some proper options are set and the OK button clicked, the tool will examine the current model to see if any such detached elements. If there are, they can be iterated through by an Iterator dialog as follows.
All the elements of concern can be checked one by one through the four navigation buttons in purple. The major properties/parameters of the current element of concern are displayed for checking. It can even be modified such as (Un)Delete, Attach Top, Attach Base depending on its current status. The element can be zoomed to and highlighted, or its host can be if applicable and necessary.
After elements of concern are checked and modified, the close button at the right top corner can be clicked to dismiss the dialog.