For flat or low-slope commercial roofs, a Roofing Contractor may install or repair systems using TPO, EPDM, PVC

https://metalinstallationcontractor204.zenbloomer.com/posts/aging-roof-replacement-knowing-when-repairs-aren-t-enough

For flat or low-slope commercial roofs, a Roofing Contractor may install or repair systems using TPO, EPDM, PVC, modified bitumen, or built-up roofing.