ARXX Green Build System. Conduit is proud to have partnered with Arxx, the #1 Insulated Concrete Form (ICF) Wall System in North America. Arxx has been approved by all major North American building codes, and is the only ICF to receive a UL/ULC fire rating. At Conduit, we build better tomorrows by protecting the earth today. But just as importantly, we save our clients thousands of dollars over time by making every project we touch more efficient and sustainable from the very beginning. Our work is setting new benchmarks in sustainable green building, minimizing wasteful energy costs, maximizing efficiencies, enhancing property values and helping conserve vital natural resources. alternative, angeles, california, concrete, construction, forms, green, icf, insulated, los, sustainable