Plastic Formwork System | Design with the Other 90% Plastic Formwork System | moladi Every year, nearly seventy million people, or 200,000 a day, move from rural areas to urban cities. In South Africa alone, more than 2.2 million homes are currently needed, and an additional 180,000 homes will be needed every year to keep pace with rapid urbanization. The Plastic Formwork System is a method of building cast-in-place reinforced concrete structures, in which the walls of a house can be built in as little as a day by unskilled laborers with locally sourced materials and little waste. The system is comprised of square plastic components that join together to form wall panels from which the house is assembled. The house’s infrastructure—steel-reinforcement bars, conduits, window and door frames, pipes and other fittings—is positioned on the wall; once in place, these elements are sandwiched between a second layer of panels, forming a cavity into which a lightweight concrete mortar