Manufactured housing accounts for about 10% of the new homes built each year. Learn what makes trailers different from “regular” wood-frame structures and how to safely operate within this challenging environment. Tactics for suppression and ventilation as well as strategies for operating in high-density mobile home communities are also presented. Although often overshadowed by larger residences, mobile homes are found in communities of all sizes. In fact, 24% of all mobile homes are located in cities with a population of more than 2,000,000. In rural areas with long response times, a trailer fire is often a defensive operation. However, in urban or suburban communities, interior fire attacks are feasible, especially in larger double- and triple-wide homes. In these structures, ultra-lightweight construction, tight hallways, and unusual floor plans all combine to make an unfamiliar and potentially dangerous environment for firefighters accustomed to operating in site-built houses.