A Finish Schedule is the traditional way to show what the finishes are for each interior space of a project. For new construction that approach works very well. For remodeling or renovation the table format of the Finish Schedule doesn't lend itself to the many variations that you encounter. The Finish Key is much more flexible by allowing detailed descriptions of the intended work. In a schedule these descriptions become footnotes, easy-to-miss footnotes.
There are several ways to use a key. Below is my favorite. The symbol is placed in each space directly or indicated by leader arrow. Each wall is tagged with its finish. The center space is used for flooring and base (ceilings can be added). The descriptions can reference the Specs or they can be the Specs.
This detail is suggested to specify the finishes of interior spaces.
The key can eliminate the need for specifications of the finishes in some cases. Add a specification note.
This detail should be placed on the floor plan sheets for easy reference. These are normally the A100 or AE100 series of sheets per the National CAD Standards.
Download PDF of detail.