Free Calculator
Commercial Roof Cost Calculator
Estimate your commercial roofing project cost across all major membrane types — TPO, EPDM, PVC, modified bitumen, BUR, and metal — by roof size, project type, and region.
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Estimate Your Commercial Roofing Cost
Enter your roof area, system type, and project details to see a realistic cost range before soliciting bids.
The flat footprint area of your roof — not the building's interior floor area.
Most popular single-ply. White surface reflects heat well.
📋 Important: All calculator results are ballpark estimates
The figures shown are approximate estimates based on typical averages and should be used for general planning purposes only. They are not a substitute for a professional assessment or written contractor quote. Actual costs, savings, and results will vary significantly based on your specific circumstances, local market conditions, equipment choices, and contractor pricing. Always confirm any estimate with a licensed contractor, financial advisor, or qualified professional before making purchasing or financial decisions.
Choosing the Right Commercial Roofing System
TPO vs. EPDM: the most common choice
TPO and EPDM together account for the majority of commercial flat roof installations. TPO's white surface reflects heat and reduces cooling loads — a significant advantage in warm climates. EPDM has a longer track record (40+ years commercial use), excellent UV resistance, and is often less expensive to maintain. For most building types, either is a sound choice; the decision often comes down to your region's climate and which your local roofing contractors have the most experience installing.
PVC is worth the premium for certain applications
PVC's chemical resistance makes it the preferred choice for restaurants, food processing facilities, and any building with roof-mounted kitchen exhaust. Grease, oils, and harsh chemicals that destroy TPO and EPDM have little effect on PVC. If your building has heavy exhaust or chemical exposure, the cost premium of $2–$4/sqft is almost always justified in extended lifespan.
Always get a core cut inspection before a recover
A roof recover can save $1.50–$2.50/sqft compared to full replacement — but only if the existing roof system is sound. Wet insulation (from a slow leak that was never properly repaired) must be removed, or the new membrane will be installed over a compromised substrate that shortens its life dramatically. A core cut inspection takes an hour and typically costs $300–$600 — always worth it before committing to a recover.
What a complete commercial roofing bid should specify
- Membrane type, manufacturer, and thickness (60 mil vs. 80 mil matters)
- Insulation type (polyiso, EPS, mineral wool) and R-value
- Attachment method (mechanically fastened, adhered, or ballasted)
- Flashing detail at penetrations, parapet walls, and drains
- Manufacturer warranty term and contractor labor warranty
- Exclusions for deck repairs discovered during tear-off
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Book a Free DemoFrequently Asked Questions
How much does a commercial roof cost per square foot?
Commercial roofing typically costs $5–$12 per square foot installed for common systems like TPO, EPDM, and modified bitumen. PVC runs $7–$12/sqft and metal roofing $8–$18/sqft. A full replacement on a 10,000 sq ft building typically runs $60,000–$120,000 depending on system type, tear-off, and region.
What is the most cost-effective commercial roofing system?
TPO (thermoplastic polyolefin) offers the best value for most commercial buildings — typically $5.50–$9.50/sqft installed, with excellent energy efficiency from its white reflective surface and a 15–25 year warranty. EPDM is similarly priced and has a longer performance track record (40+ years in commercial use). Both are significantly cheaper than metal roofing.
Is it cheaper to recover or replace a commercial roof?
A roof recovery (installing new membrane over the existing one) saves $1.50–$2.50/sqft in tear-off labor and disposal costs. It's a legitimate option if the existing membrane is sound, there's only one layer in place, and the deck is dry and structurally solid. A core cut inspection should be performed first to check for wet insulation — wet insulation must be replaced before recover.
How long does a commercial roof last?
Lifespan varies widely by system: TPO 15–25 years, EPDM 20–40 years, PVC 20–30 years, modified bitumen 20–30 years, BUR 20–40 years, and metal roofing 40–70 years. Regular maintenance (at least twice/year inspection plus minor repairs) is the single biggest factor in maximizing lifespan regardless of membrane type.
What should a commercial roofing bid include?
A complete commercial roofing bid should itemize: tear-off and disposal, insulation board (type, R-value, layers), membrane system and thickness, flashing details at penetrations and perimeter, warranty terms (manufacturer + contractor labor), and any deck repairs. Watch for bids that don't specify membrane thickness or insulation R-value — these are specs that directly affect system performance and longevity.
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Get a Free DemoAll calculations are ballpark estimates based on typical commercial roofing costs and should be verified with licensed roofing contractors before making any financial or procurement decisions.