Abstract: A method of constructing modular wall and floor units, and modular manufactured buildings from such units, is disclosed. The use of a metal-compatible cementitious building material and a unique technique for panel formation allows for the simple and simultaneous formation of wall or floor panels and integration of those panels with the reinforcing and supporting frames to form "half sections" of modular building walls and floors. These half sections can then be readily provided with in-wall and through-wall services at the factory in a manner which permits the workers to have clear access to the appropriate sections of the building for easy installation of such services. Upon completion of the installation of services, the corresponding half sections can be joined to form fully integrated and framed units and buildings including walls, floors or ceilings with a minimum of effort.