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Our commercial roofing team serves businesses and property managers across the St. Louis metro. Whether you have an active leak, are planning a re-roof, or need a second opinion on a proposal you’ve received, contact us for your free assessment.
Flat and low-slope roofs on commercial buildings require a completely different approach than residential work — and most problems we see on office buildings and retail strips in Maryland Heights and Chesterfield come from contractors who treated a commercial roof like a scaled-up residential job. Ponding water, failed membrane seams, and improperly flashed HVAC curbs are the usual culprits. At Top Quality Exteriors, we specialize in the membrane systems that commercial buildings actually need.
We work with property managers, building owners, and general contractors across the metro on everything from routine maintenance to full re-roofing of multi-tenant properties. St. Louis springs bring hail that punctures aged EPDM or cracks brittle flashing on 20-year-old built-up systems, and summer UV exposure degrades dark membranes faster than most owners account for. If your building has storm damage, we document everything for commercial insurance adjusters. We also provide emergency roof repair for commercial structures that need immediate attention after a major storm event.
Commercial property in the St. Louis metro faces a punishing climate. Hot, humid summers combined with hard freeze cycles in winter stress low-slope membrane systems more than owners typically budget for. Chesterfield business parks, Maryland Heights industrial corridors, and the mixed-use blocks in Clayton all have buildings whose roofs need contractors who understand commercial membrane installation. We’ve re-roofed office buildings, medical facilities, retail centers, and multi-unit housing across the metro. Our commercial crews train specifically on TPO heat welding, EPDM adhesive application, and built-up layering sequences. Seam integrity is everything on a flat roof — a poorly welded TPO lap or under-primed EPDM seam fails within three to five years, often voiding the manufacturer warranty in the process. We use commercial-grade primers and perform pull-tests on welded seams as standard QC. Ask about pairing commercial re-roofing with a residential roofing project to run both under one contract.
Commercial roofing jobs require detailed coordination — permits, building access, tenant schedules, and equipment curbs all factor in. Here’s the consistent five-step process we follow to keep every commercial project on time and within budget.
We walk the full roof, probe for moisture, inspect penetrations and curbs, and photograph damage. A written report gives you the full picture before any scope or budget decisions.
We select the right membrane for your building type, pitch, R-value, and budget. For most St. Louis commercial properties, TPO or EPDM offers the best cost-to-longevity ratio.
Commercial re-roofs require permits across St. Louis municipalities. We pull them, coordinate access and tenant impact, and deliver a full project schedule before any crew arrives.
We install insulation board and the chosen membrane. TPO seams are heat-welded and pull-tested. EPDM laps are primed per specs. All curb and penetration flashings are completed.
We inspect all seams and terminations, clear the punch list, and register your warranty. Documents covering materials and our installation labor are sent to you within two weeks.
Commercial roofing mistakes are expensive. A failed seam on a 15,000 sq ft TPO roof can let water into wall cavities, destroy insulation R-value, damage inventory, and trigger mold remediation — all because a contractor skipped the primer step. Our commercial crews train separately from our residential teams, and our project managers hold commercial roofing experience. We carry general liability coverage scaled to project size and workers’ comp for every employee on the job.
We’ve worked with property managers in Chesterfield, building owners in Clayton, and facilities teams at Maryland Heights office parks. If you manage multiple buildings, we can set up a maintenance program with annual inspections, seam checks after hail events, and documented repair history — useful for insurance renewals and asset sale. Ask about our commercial maintenance agreements when you schedule your assessment.
Commercial roofing is priced per square and varies based on membrane type, insulation thickness, penetration count, and whether existing material needs full removal. In the current St. Louis market, TPO on a low-slope building runs $6.50–$10.00 per square foot installed, depending on R-value requirements. EPDM comes in slightly lower in some configurations; built-up roofing runs higher. We document any wet insulation discovered and price it separately — no surprise line items on the final invoice.
The ROI case for planned membrane replacement is clear. A well-installed TPO or EPDM system carries a 20-year manufacturer warranty and often outlasts it with annual maintenance. Repeated patch cycles on aging membrane typically cost more over five years than a planned replacement. We can build you a cost comparison during the assessment phase so you have real numbers for ownership or your board.
Every credential we carry is a commitment to quality, safety, and your peace of mind — on every project, in every state we serve.
