Interior Floor Covering
There is a variety of floor coverings available, including linoleum, carpet, wood, etc. Just about anything that's available for a building can be installed in your trailer. You will want a floor covering that can be cleaned up easily if your trailer will be experiencing heavy traffic. A raised dot rubber tile, also known as disco tile, is commonly used. Many flooring materials are available in both continuous sheet and tiles.
Also keep in mind any unusual needs you may have. For example, some medical and mobile morgue trailers use harsh chemicals that might damage an ordinary floor, but special floors are available that are impervious to these. Your logo may be installed in the flooring if desired too.