A new, simple but versatile system has been developed that incorporates specially designed formwork as a permanent part of a wall. Essentially, it involves setting in place, bracing, and filling with concrete some unique forms that become integral with concrete. These special forms are made of expanded metal lath spot welded to steel channels connected with trusses. All that is required after concreting is to remove the bracing and finish with plaster. The method not only introduces economies but also speeds construction of small buildings to the extent that they can compete in both cost and rapidity of erection with systems steel buildings which draw their popularity largely from the rapidity of the assemble. Cost of the integral form walls are said to be 10 to 50 percent lower than those for standard cast-in-place concrete construction. The method has been almost seven years in development, including four and a half years for perfecting the machinery to produce the needed materials, acquiring patents an getting the product approved by major code writing bodies. It is now available for use in building walls, floors, foundations, retaining walls, dams, and seawalls. The system produces an insulated concrete wall in place, complete with electrical conduit and plumbing, that can be finished on both sides. A completed wall consists of plastered concrete with skins of metal lath near each surface and a layer of insulation near one surface. Because the two metal skins are connected by a steel truss system little additional steel is required.