Many of these companies also build commercial units. This type of company builds double or multi-section modular homes inside a factory. Builds both types of homes. These manufacturers build commercial modular or panelized structures inside a factory. Companies of this type are home builders with one or more factory made components such as roof trusses, floor trusses and wall panels.
Some companies build their own components.
Either way, the majority of the interior finish work is done by the production builder and his subcontractors at the job site. These independent companies build components primarily for sale to on-site production builders or other companies in the home or apartment construction industry.