Abstract: A method and system for forming walls includes a dual-wall cavity. A stud is formed of an outer flange, middle flange and inner flange arranged in an "E" shape configuration. An outer panel attaches to the outer flange, a middle panel attaches to the middle flange and an inner panel attaches to the inner flange. An outer cavity is formed between the outer panel and the middle panel. The outer cavity can be filled with a filler material for providing structural and insulation features. Thereafter, an inner panel attaches to the inner flange for providing an inner cavity. The inner cavity can be used to house utility materials such as plumbing, air ducts, heating and electrical.