Big Easy Roofers works on commercial buildings across New Orleans, from converted warehouses in the Bywater to restaurant rows along Magazine Street and historic office buildings in the CBD. Every one of these structures needs a roof system that can handle what South Louisiana throws at it—torrential downpours, sustained Gulf winds, and relentless humidity. Choosing the wrong system means premature failure, interior water damage, and expensive emergency repairs. Here is what you need to know about the commercial roof types that actually perform in this city.
Walk through any commercial district in New Orleans and look up. Almost every building has a low-slope or flat roof. There is a practical reason for this: flat roofs let property owners maximize usable interior space, support heavy HVAC equipment, and simplify construction on large footprints. Warehouses in the Upper Ninth Ward, strip malls along Veterans Boulevard, and multi-story office buildings downtown all rely on flat roof systems.
The term “flat” is slightly misleading. Every well-designed commercial flat roof has a slight slope—typically between 1/4 inch and 1/2 inch per foot—so water moves toward drains, scuppers, or gutters. In a city that averages 64 inches of rain per year, that small pitch makes the difference between a dry interior and a catastrophic leak.
Thermoplastic polyolefin (TPO) membranes have become the go-to option for commercial roofs in the Gulf South. A single-ply white membrane, TPO reflects UV radiation and helps reduce cooling costs—a real advantage when your building runs AC nine months out of the year.
TPO sheets are heat-welded at the seams, creating watertight bonds that hold up well against pooling water. The material resists mold and algae growth, which matters in the humid subtropical climate here. Most TPO systems carry manufacturer warranties between 15 and 30 years depending on membrane thickness (typically 45 mil, 60 mil, or 80 mil).
One trade-off: TPO is a relatively young product compared to EPDM or BUR systems, and some early formulations had cracking issues. Modern TPO from established manufacturers like Carlisle, GAF, or Firestone has resolved those problems, but installation quality still determines long-term performance. Poorly welded seams will fail regardless of material quality.
Ethylene propylene diene monomer (EPDM) is a synthetic rubber membrane that has been used on commercial roofs since the 1960s. If you own an older commercial building in New Orleans—say a Mid-City warehouse or a Gentilly office park—there is a good chance your current roof is EPDM.
EPDM is durable, flexible, and relatively affordable. Black EPDM absorbs heat, which is a disadvantage in Louisiana summers but can be offset with a reflective coating. White EPDM is available but less common. The material handles temperature swings well and resists UV degradation over time.
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Jun 13, 2023