A Roofing Contractor can manage commercial flat-roof systems by installing or repairing TPO, EPDM, PVC, modified bitumen

https://metalinstallationcontractor417.capitaljays.com/posts/roof-replacement-after-leak-what-to-expect

A Roofing Contractor can manage commercial flat-roof systems by installing or repairing TPO, EPDM, PVC, modified bitumen, or built-up roofing.