Add a 1-inch layer of Styrofoam insulation to the ceiling, sides and floor of your trailer. Use a utility knife and a yardstick to make parallel cuttings that are spaced 1/2 inch apart. Avoid cutting all the way through so that you can bend the insulation to fit any curved interiors.
Attach the insulation to interior wall beams with aluminum tape. This kind of tape will withstand higher temperatures.
Cover the insulation on your walls with your covering of choice, such as no-rust galvanized steel. Choose your covering for the ceiling and floor.
Add stripping around the door frame to prevent moisture leakage with polyurethane contractor's adhesive. Use measurements of 1 foot by 1 to 3 feet. Also glue the strips to the bottom of each door, clamping the strips to the frame until the glue has dried over a 24-hour period.
Frame your interior with plywood. Determine where you want to mark spaces for closets, drawers, over-bed cabinets, bench seat for housing electrical components, a shower, refrigerator/sink, microwave and stereo/DVD housing.
Fuse everything and test all your connections before adding the paneling, advises todd.redwrench.com. House all of the electrical connections in the bench seat, including the 12-volt fuse block, the breaker box and an inverter. Microwave and refrigerator wiring would need 120 volts.
Use 3/8-inch Pex tubing for your plumbing needs. Install a utility tub for your shower pan. Use drainage pipes beneath the shower and sink to lead to portable collection tanks.
