 FEMA trailers are manufactured from plastic, aluminum, and particle board, and are therefore somewhat flimsy and require more maintenance than a permanent structure.They are also poorly insulated, offer little sound insulation, and are known to sway in high winds.While occupying FEMA travel trailers or mobile homes, residents are responsible for maintaining their trailers, such as keeping the trailers clean, changing lightbulbs and smoke-detector batteries, and making sure propane fuel tanks are refilled with fuel.