Radiant barriers is a subdivision of the SIC Code 1742 that involves the installation of reflective materials to reduce heat transfer in buildings. This industry is focused on improving energy efficiency and reducing energy costs by preventing radiant heat from entering or leaving a building. Radiant barriers are typically installed in attics, walls, and roofs, and can be made from a variety of materials such as aluminum foil, plastic film, or cardboard. The installation process involves measuring and cutting the material to fit the specific area, and then securing it in place using staples, tape, or other fasteners.