How Much Does Single-Ply Commercial Roofing Really Cost?

Single-ply roofing prices quoted online often don't reflect real project costs. Here's an honest breakdown.

Base Cost Ranges

TPO (60-mil): $5.00–$8.00/sq ft installed. TPO (80-mil, premium): $6.50–$9.50/sq ft installed. EPDM (60-mil, fully adhered): $5.50–$8.50/sq ft installed. EPDM (60-mil, ballasted): $4.50–$7.00/sq ft installed. These ranges apply to straightforward commercial roofs with standard complexity.

What Drives Cost Higher

Old roof tear-off: add $1.00–$3.00/sq ft. Multiple tear-off layers: add further $0.50–$1.50/sq ft per layer. Wet insulation removal and replacement: add $1.00–$2.50/sq ft for affected areas. High roof complexity (many penetrations, HVAC units, slopes): 15–30% premium. Emergency or fast-track scheduling: 15–25% premium.

What Drives Cost Lower

Large roof size (economies of scale, particularly over 50,000 sq ft). Single layer tear-off vs. no tear-off. Competitive market with multiple qualified bidders. Off-peak scheduling.

The Alternative Comparison

For a 10–15 year old single-ply roof showing seam wear, silicone coating restoration at $2–$5/sq ft is typically 40–60% less than a new TPO installation — with a comparable manufacturer warranty. Before accepting a replacement proposal on an aging roof, get a restoration assessment first.