Commercial roofing systems, compared.
Membrane, metal, coating or solar — we match the system to the building, the climate and the way the building is used.
- Systems
- 5 platforms
- Service life
- 20–60 years
- Approach
- Lifecycle cost
Choose by system.
Each page explains how the system is built, where it fits, what it costs and how to keep it working.
There is no best roof — only the best roof for this building
Every commercial roof is a trade-off between first cost, service life, energy performance, the way the building is used and how much disruption the owner can tolerate during the work. A distribution center with a 300,000 sq ft roof, a strip mall with forty rooftop units and a glass-fronted headquarters with a visible pitched roof need different answers, even in the same city.
We start with the building, not the product. Before recommending a system we look at four things:
- Slope and structure. Low-slope roofs (below roughly 2:12) call for membranes or structural standing seam; steeper roofs open the door to architectural metal and solar shingles. Deck type and spare structural capacity decide whether ballast, solar racking or a re-cover is even possible.
- Climate. Heat, UV, snow load, wind exposure and long wet seasons each push toward different materials, colors and attachment methods.
- Operations. What happens under the roof — cold storage, food processing, retail floors, occupied offices, 24/7 production — shapes the installation method as much as the material.
- Lifecycle budget. A roof that costs 20% more but lasts twice as long, or cuts cooling bills every summer, is often the cheaper roof. We compare options on cost per year of service, not just the bid.
The systems we work with
| System | Typical service life | Installed cost* | Best for |
|---|---|---|---|
| TPO single-ply | 20–30 years | $7–$12 / sq ft | Large low-slope roofs: warehouses, retail, light industrial |
| PVC single-ply | 20–30 years | $8.50–$14 / sq ft | Roofs exposed to grease, oils or chemicals: restaurants, plants |
| Standing seam metal | 40–60 years | $13–$21 / sq ft | Visible and pitched roofs, long-hold owners, solar-ready roofs |
| Cool roof coating | +10–15 years to an existing roof | $2.50–$5 / sq ft | Sound but aging roofs in warm climates; avoiding tear-off |
| Solar roofing | 25+ years (PV warranty) | $22–$40 / sq ft (integrated) | Owners with energy goals and roofs with the right exposure |
*National planning ranges for a tear-off replacement of a typical 10,000–50,000 sq ft roof, before regional adjustment. Use the cost calculator for your state and size.
Membrane, metal or coating: the short version
Membranes (TPO, PVC, EPDM) are the default for low-slope commercial roofs because they are light, fast to install over huge areas and cost-effective. Standing seam metal costs more up front but can outlast two membrane roofs and becomes part of the architecture. Coatings are not a new roof — they are a way to add a decade or more to a roof that is still dry and structurally sound. Solar is best planned together with the roof under it, so that a 25-year energy system never sits on a roof with eight years left.
Not sure where your building fits? Read our guide TPO vs PVC vs EPDM, or send us the basics with a few photos and the roof size.
Choosing a system: common questions.
What is the most common commercial roofing system in the US?
For low-slope commercial buildings, single-ply membranes — mostly TPO, with PVC and EPDM behind it — cover the majority of new and replacement roofs. They are light, quick to install over large areas and cost-effective. Metal dominates where roofs are pitched or visible.
How long does a commercial roof last?
Roughly 20–30 years for a well-installed and maintained TPO, PVC or EPDM roof, 20–25 for modified bitumen, and 40–60 for standing seam metal. Coatings add 10–15 years to a sound existing roof and can be renewed. Poor drainage, skipped maintenance and roof traffic are what usually shorten these numbers.
Which roof is best for energy efficiency?
In warm climates a highly reflective white membrane or cool roof coating cuts surface temperature and cooling load the most. In cold climates insulation matters more than color. Either way, the biggest single gain on a re-roof is usually bringing insulation up to current energy code — something a tear-off makes easy.
Can a new roof go over the existing one?
Often, once. Building codes generally allow a single re-cover if the existing roof is dry, well attached and not already re-covered. A moisture survey decides it: wet insulation traps water and must come out. A re-cover saves tear-off cost and disruption but adds weight and can limit future options.
How much does a commercial roof cost per square foot?
As a national planning range, a tear-off replacement runs about $7–$12 per sq ft for TPO, $8.50–$14 for PVC and $13–$21 for standing seam metal, with restoration coatings from $2.50–$5. Location, size, access, insulation and rooftop equipment move the number — our cost calculator adjusts for all of them.
Go deeper before you decide.
Not sure which system fits?
Send us the roof size, age and a few photos. We will come back with the two or three options worth pricing — and the one to avoid.