Abstract: A method to create a precast concrete module includes: pouring the foundation; placing a welded wire mesh reinforced polystyrene panel into a wet mix; allowing the mix to partially set up, and pouring the top of the slab; installing wall and roof panels and mechanically attaching them with welded wire mesh; installing electrical and plumbing prior to placing concrete forms; placing the forms and pouring concrete mix into the forms; and wrecking the forms and finishing out the module.