Many people choose to leave the side walls of the container exposed however the other option is to insulate and install an internal wall over the top. This is done using a steel framework and then covering in either plywood or gypsum. If you use steel framework then it is always best to stick to galvanised steel sections.
Whichever method is used it is always best to include a thermal break between the inner wall and the metal walls of the container.
Interior walls are fairly easy to install and should be done before the main interior finish. When constructing walls remember to allow room for the interior wiring conduits and water pipes to run.
The main thing you need to consider is whether to use timber framing or steel framing. At Container King we prefer to use Steel Framing to ensure there are no problems with termites etc. The main things that differ from traditional framing are how the walls are connected to the containers, and that they are not load bearing.
Walls are attached to the containers using a combination of screws, bolts or welding. Normally we would install 4 horizontal steel supports and then vertical spacers at 60omm gaps to allow for easy installation of the final wall panels which would be plywood, gypsum or viva board.
Once all internal walls are installed the decision is to either plaster and paint, tile or cover with wallpaper. Again personal preference and budget will determine the options.
REMEMBER! When you transport the containers the vibrations will be very intense and normally would make the joins crack unless you use supports during transit. In many cases it is best to finish the final walls on location.