Most modular homes are constructed entirely within a controlled climate, factory walls. Construction continues year round and assembly line workers don’t need to be skilled carpenters and are paid about half of what on-site contractors are normally paid. Many of the labors working in the modular housing industry have steady jobs with benefits and can afford to buy the products they make.
Factories are located to make the most efficient use of transportation, materials and labor. Therefore, the houses can be built better, faster, more efficiently and more economically. Also, there is less waste and none of the pilferage, vandalism and weather damage common with stick-built construction. After delivery to the site, all homes that are built in a factory can be assembled, closed in and occupied in a matter of days or weeks.
The precision machinery used in fabrication will accept only high quality kiln-dried lumber, unlike the “green” boards which often go into stick-built houses. Joints are both nailed and glued. The resulting tight construction makes the houses stronger and more energy efficient. Prefabricated components are built extra rigid to hold up during shipping and assembly, which makes the houses better able to withstand earthquakes and severe wind storms. It is estimated that factory-built homes have 20 to 30 percent more lumber as compared to stick-built homes. In general, factory-built homes are over engineered to withstand the transportation to site.
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