Chicago Flat Roof Company, Roofing Contractor, Roof Membranes.
the most economical single-ply membrane. TPO costs around $1.70 per square foot, again excluding insulation. PVC is priced at around $1.90 per square foot without insulation. Modified bitumen is sold at a higher price from $1.30 to $2.20 per square foot excluding insulation. The price varies