MacGregor's Custom Machining manufactures highly energy efficient modular buildings for various markets, including commercial, retail, residential, industrial, and specialized buildings. Their modular buildings provide advantages such as steel laminated foam core insulated wall and roof panels for insulation and durability. The frames are made of structural steel. Components are prefabricated for quality control and reduced installation time. The degree of modularization depends on transportation and site requirements, ranging from fully assembled buildings to modular wall panels assembled on site.