Commercial roof systems
TPO, EPDM, PVC, modified bitumen and built-up. We install all the major systems, so the recommendation fits your building rather than our habits.
- ASteel deck on open-web joists.
- BTapered insulation, sloped to the drain.
- CParapet flashing and counter flashing.
- DSingle-ply membrane with a heat-welded lap.
- ECoating over the membrane.
- FRoof drain at the low point.
The right system for the building
Every commercial building is different: its slope and drainage, its rooftop equipment, what goes on inside it, and its budget. We assess yours and recommend the system that will perform best over the long run, not the one we happen to prefer installing.
| System | What it is | Best for | Typical life |
|---|---|---|---|
| TPO | White single-ply membrane with heat-welded seams. | Cost-conscious buildings that want reflectivity: churches, schools, offices. | 20 to 30 years |
| EPDM | Synthetic rubber membrane with adhered, taped seams. | Proven durability with little maintenance: warehouses and storage. | 25 to 35 years |
| PVC | Premium heat-welded membrane with strong chemical resistance. | Restaurants and manufacturing with grease or chemical exposure. | 30 to 40 years |
| Modified bitumen | Reinforced asphalt membrane that takes foot traffic. | Roofs with frequent HVAC maintenance traffic. | 15 to 25 years |
| Built-up | Layered asphalt and felt roofing. | Buildings where a multi-ply roof suits the use. | 15 to 30 years |
Life spans are typical ranges for properly installed systems. Installation quality, membrane thickness, maintenance and rooftop traffic all move them.
Installed with commercial methods
- TPO and PVC seams are heat-welded with hot-air welders, not taped.
- EPDM is fully adhered with compatible adhesives.
- Mechanically fastened systems are fastened to resist wind uplift.
- Penetrations for HVAC and drainage are planned and flashed into the system.
From assessment to a finished system
- 60 to 90 minutes
Roof assessment and system recommendation
We inspect the membrane, drainage, insulation, deck and every penetration, and tell you whether coating, restoration or replacement makes sense.
- In writing
Detailed proposal
Manufacturer and warranty, membrane thickness (45, 60 or 80 mil), attachment method, insulation, drainage improvements, flashing details and timeline.
- Around your hours
Pre-construction planning
Phased schedules for occupied buildings, protection for rooftop equipment, and access routes away from customers and staff.
- On site
Installation with quality control
Seam testing, fastener pattern checks and drainage confirmation as we go.
- Documented
Final inspection and warranty activation
Photos, warranty paperwork and a maintenance plan for the system.
How we work, in our customers' words
Word for word from Google, from homeowners.
Great team of professionals with high expectations and extreme quality work. Hand shake type of agreement prior too. The old school way. My word is My Bond. Thanks TopCo
5 out of 5 stars Gaylon R. · Google review · May 2026
It's hard to find an organization that will fulfill their work commitments by completing every promise made. I found that Ashton and the entire TopCo organization will make a promise that will not only be completed but done in a high quality and professional manner. I highly recommend this honest and very hardworking organization on any job commitment they promise.
5 out of 5 stars james P. · Google review · June 2026
Fast response, excellent customer service, top notch work. If you’re in need of a complete roof replacement or just repair give these guys a call.
5 out of 5 stars Jason G. · Google review · April 2026
Questions we hear
Can a new system go over my existing roof?
Sometimes. If the existing roof has one layer, is structurally sound and drains properly, and the code allows it, a roof-over avoids tear-off costs. Wet insulation, structural damage or two existing layers mean a full tear-off to the deck.
Do commercial roofs need maintenance?
Yes. Inspections in the spring and fall, clear drains and gutters, debris removal, seam checks and quick repairs of small damage all extend the life of the system. We give you maintenance guidelines for your specific system.
What does a commercial system cost?
General ranges per square foot: TPO $4 to $8, EPDM $4 to $9, PVC $6 to $12, modified bitumen $5 to $10, built-up $4 to $10. A straightforward 10,000 square foot replacement might run $50,000 to $80,000 installed. You get a detailed proposal with pricing for your building.
What warranty comes with it?
A manufacturer warranty on materials, 10 to 30 years depending on the system, and our workmanship warranty on the installation.
Talk to a commercial roofer.
Free commercial roof assessment, and an honest recommendation for your building.