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

https://www.slideserve.com/goldeturom/emergency-roof-repair-quick-assessment-process

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.