Commercial roof cost calculator
Build a sample budget range in under a minute. Adjust square footage, system, tear-off and access to see how each decision moves the number.
Calculator
Rates behind the calculator
Sample installed ranges per square foot, before tear-off, insulation upgrades and access factors.
| System | Sample $/sq ft | Service life | Wind rating | Details |
|---|---|---|---|---|
| TPO membrane | $7.50 - $11.50 / sq ft | 20 to 30 years | FM 1-90 to 1-120 | TPO system |
| EPDM rubber | $7.00 - $10.50 / sq ft | 25 to 35 years | FM 1-60 to 1-90 | EPDM system |
| PVC membrane | $9.00 - $13.50 / sq ft | 20 to 30 years | FM 1-90 to 1-150 | PVC system |
| Modified bitumen | $8.00 - $12.00 / sq ft | 20 to 25 years | FM 1-90 | Mod bit system |
| Metal retrofit | $12.00 - $20.00 / sq ft | 40 to 60 years | UL 580 Class 90 | Metal system |
| Roof coatings | $3.25 - $6.00 / sq ft | 10 to 20 years per application | Follows existing roof | Coatings system |
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Calculator FAQ
Straight answers on bids, schedules, leaks and warranties. Still stuck? Our estimating desk answers the phone.
It produces a sample budget range from 2026 Houston averages for illustration. Real pricing depends on core cuts, deck condition, access, code requirements and material pricing on bid day. It is not a bid.
One square equals 100 sq ft of roof area. Commercial crews and manufacturers often price and order materials by the square.
Removing existing layers means labor, dumpsters, disposal fees and protecting the deck each day. Texas code allows a maximum of two roof layers, so many buildings must be torn off to the deck.
On metal decks older than 25 years or roofs with long-term leaks, yes. A 5 to 10 percent allowance is a sensible budgeting assumption until cores and tear-off confirm the condition.
Turn the estimate into a bid
A free roof survey replaces assumptions with core cuts and measurements.
Free roof survey · Written proposal in 5 to 7 business days (sample)