Single-ply membrane roofing is the dominant commercial flat-roof category in South Florida. All Phase Construction USA installs and recovers TPO, PVC, and EPDM single-ply systems on commercial buildings, condominium associations, and modern flat-roof residential homes throughout Broward County and Palm Beach County.
The current South Florida market default for new commercial flat-roof installations. White-surfaced for solar reflectivity (lower cooling load), heat-welded seams (no adhesive failure mode), and 60-mil membrane thickness as the residential / small-commercial standard. Typical service life is 20 to 25 years on a well-installed system. TPO is what we recommend for most new commercial flat-roof projects unless a specific reason pushes us elsewhere.
Higher-grade single-ply system with superior chemical resistance — the right choice when the building has rooftop kitchen exhaust, restaurant grease venting, or chemical exposure that would degrade TPO over time. PVC is also fire-rated higher than TPO. Cost is meaningfully above TPO for the same membrane thickness, but the lifespan delta justifies it for the right application.
The legacy single-ply system. Black rubber membrane, mechanically fastened or fully-adhered. Still common on existing commercial roofs and well-suited to recover work where the existing system is intact but at end-of-service-life. New EPDM installations have largely given way to TPO except in specific cold-cycle or chemical-exposure applications, neither of which is a meaningful South Florida concern.
Broward County is a legal High-Velocity Hurricane Zone. Every single-ply installation in Broward must use a Florida Notice of Acceptance (NOA)-approved membrane, an NOA-approved fastening or adhesion system, and NOA-approved edge metal. The permit package references each NOA. Palm Beach County is not legally HVHZ but the prevailing flat-roof spec is the same NOA-approved system on either side of the county line.
Modified-bitumen (mod-bit, hot-applied or cold-process) is the older flat-roof category and still in service on a large number of South Florida buildings. Modern single-ply systems generally offer easier installation, better seam reliability (heat-welded vs. torch-down), and lighter weight. A common path forward on aging mod-bit roofs is a TPO recover with new tapered insulation, rather than a full tear-off.
Call (754) 227-5605 for a free in-person commercial flat-roof inspection. We document membrane condition, drainage performance, edge-metal integrity, and existing penetration detail. Written recover-vs-replace recommendations with photos. Companion service: flat roofing systems (TPO/PVC) for residential applications.