Commercial Roofing Mechanic Summary: Install and repair roofs with the use of commercial roofing systems including BUR, Modified Bitumen, TPO, EPDM, PVC and slope (tile/shingles). JB Roofing, a Tecta America commercial roofing company, was established in 1970 and we built our business and reputation on doing what's right for our customers, in the customer's expected time frame, and with lasting quality.