Roof system and material
The biggest driver of commercial roof replacement cost is the system you choose. TPO and EPDM single-ply membranes typically run $6–$12 per square foot installed, while modified bitumen and built-up roofing (BUR) range from about $6.50–$14 per square foot. Standing-seam metal roofing costs more up front — roughly $10–$16 per square foot — but can last 40+ years on Kentucky commercial buildings.
