Flat Roofing in San Antonio, TX
Flat and low-slope roofing systems for commercial buildings and residential properties across San Antonio and Bexar County.
Flat and low-slope roofs need a contractor who understands drainage, membrane systems, and Texas heat. Champion Roofing and Construction installs and repairs flat roofs for San Antonio commercial buildings, businesses, and homes with flat or low-slope sections — using systems built to handle ponding, sun exposure, and the high summer temperatures we see across Bexar County. Call (210) 685-3876 for a free flat roof inspection or estimate.
- TPO single-ply membrane
- Modified bitumen (mod-bit)
- Built-up roofing (BUR)
- Leak repair & patching
- Seam repair & re-sealing
- Ponding water solutions
- Re-roofs & full replacement
- Commercial & residential
- Post-storm inspections
Common Flat Roof Problems in San Antonio
Flat and low-slope roofs in San Antonio share a common set of issues: ponding water where drainage isn't quite right, blistering from trapped moisture or heat, seam failures on aging membranes, punctures from foot traffic and HVAC service work, and UV degradation from years of direct South Texas sun. Most of these problems are fixable — but only if the contractor diagnoses the actual cause instead of just patching every leak that shows up. We take the time to figure out the real problem before we quote a fix.
TPO Single-Ply Membrane
TPO is one of the most popular commercial flat roof systems in San Antonio, and for good reason. It's a reflective white membrane that bounces solar heat instead of absorbing it, which can meaningfully reduce cooling costs on a large commercial building. It's energy efficient, resistant to punctures, and welds together at seams for a strong watertight bond. TPO is a strong first choice for most commercial buildings and many residential flat sections.
Modified Bitumen and Built-Up Roofing
Modified bitumen (mod-bit) is rugged, forgiving, and easy to repair — a great fit for smaller flat sections, residential flat roofs, and buildings where foot traffic is common. Built-up roofing (BUR), the classic tar-and-gravel system, is still installed on some larger commercial properties. We work with all three systems and will recommend the one that matches your building, exposure, and budget honestly.
Ponding Water and Drainage
"Ponding" — standing water that doesn't drain within 48 hours after rain — is one of the biggest killers of flat roofs in South Texas. Sometimes ponding is a slope problem that needs tapered insulation to fix. Sometimes it's a clogged drain or scupper that clears in an afternoon. When we assess a flat roof, we look at how water actually moves across it and design the repair or replacement to keep the water headed toward the drains, not sitting on the membrane.
Commercial Flat Roof Service
We service commercial flat roofs across San Antonio — retail buildings, offices, warehouses, restaurants, medical buildings, and multi-family properties. Commercial work is scheduled around your operations to minimize disruption, and we coordinate with property managers, HVAC contractors, and other trades on the roof.
Maintenance Programs Extend Flat Roof Life
Flat roofs benefit from regular inspections more than steep-slope roofs do — they collect debris, they take more foot traffic, and small membrane issues turn into leaks faster. Ask us about scheduled maintenance for your commercial or residential flat roof. Predictable cost, fewer emergencies, and a longer roof life.
Serving San Antonio and Surrounding Areas
We install, repair, and maintain flat and low-slope roofs across San Antonio, Alamo Heights, Stone Oak, Leon Valley, Helotes, Converse, Universal City, Schertz, Cibolo, New Braunfels, Boerne, Seguin, and other Bexar County communities. If you're within roughly 100 miles of San Antonio, we can quote your project.
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