Flex Roofing Systems (Flex Membrane International, Inc) was established in 1988 as one of the first manufacturers of modified PVC single ply roofing membranes incorporating DuPont Elvaloy® KEE, a unique plasticizer that keeps the material indefinitely flexible, while making it highly resistant to environmental and temperature extremes and exposure to a wide range of chemicals and pollutants.

As a pioneer in single ply membrane roofing systems, Flex has since added to its product lines, as well as its expertise in all the systems it supplies. These roofing systems are installed only by certified installers based on training and experience with Flex products and techniques.