TPO Roofing Cost Calculator
TPO is the go-to single-ply membrane for flat and low-slope roofs. Enter your roof area, the installed price per square foot, and whether old roofing needs tearing off for a realistic cost range.
Typical installed TPO runs $5–$12 per sq ft depending on membrane thickness, insulation, and roof complexity. Always get 2–3 local quotes.
How the TPO roofing cost calculator works
The estimate multiplies your roof’s square footage by the installed price per square foot — the way roofers actually bid TPO jobs. Choosing tear-off adds $1.50 per sq ft for removal and disposal. The low/high range (±15%) reflects real-world variance: simple rectangles land near the low end, while parapets, penetrations, and tapered insulation push toward the high end.
The $7.50 default sits mid-range nationally; 60-mil membrane over new insulation in a straightforward market can dip toward $5–$6, while 80-mil systems with heavy detail work exceed $10.
base = area × $/sq ft (+ $1.50 × area if tear-off) · low = base × 0.85 · high = base × 1.15
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TPO roofing cost calculator FAQ
What is TPO roofing?
Thermoplastic polyolefin — a white single-ply membrane heat-welded at the seams, popular for flat and low-slope commercial and residential roofs because it reflects heat and resists UV.
How much does TPO roofing cost per square foot?
Installed, typically $5–$12 per sq ft. Membrane thickness (45, 60, or 80 mil), insulation layers, and roof complexity move the price within that band.
How long does a TPO roof last?
Usually 20–30 years with proper installation and maintenance. Thicker membranes and welded (not glued) seams last longer.
Is tear-off required before installing TPO?
Not always — one existing layer can often stay, saving $1.50+/sq ft. But two layers, wet insulation, or a damaged deck usually force a tear-off. Local code decides.
What affects the price most?
Roof size (bigger is cheaper per foot), number of penetrations and parapets, insulation needs, membrane thickness, and local labor rates.