Manufactured homes have to meet or exceed one tough set of standards. These regulations cover nearly every conceivable aspect of home building, including design, construction, strength, durability, fire resistance, energy efficiency, ventilation, wind resistance and installation procedures.
This so-called HUD Code is the short title of the "National Manufactured Housing Construction and Safety Standards Act of 1974." The law establishes "a reasonable standard for construction, design, and performance of a manufactured home, which meets the needs of the public, including the need for quality, durability and safety."
The HUD Code is both national and preemptive. This means each State or political subdivision of a State must adopt the Code without modification.