Commercial Roof Replacement in Gretna, LA

We do not publish a square foot range for commercial replacement, because the area, the assembly and the condition of the insulation move the figure too far for a range to be useful. What we will do is survey the roof, take core cuts where the build up is unclear, and price the membrane, the insulation, the drainage and the flashings as separate lines so the quote can be compared with anyone else.

The City of Gretna does not publish a standalone commercial roofing permit fee on its Building Department page, and it is confirmed with the office at file, processed through its commercial route. The parish route is priced from its general commercial schedule rather than a roofing line. Both are permit side costs, not the cost of the roof.

It depends on three things, and none of them can be judged from the ground: whether the insulation is dry, how many coverings the building already carries, and what the deck is doing at the perimeter. A recover is quicker and cheaper and it cannot remove water, so where the insulation is saturated it locks the problem in under a new membrane. Core cuts settle it.

TPO and PVC suit large open roofs where a reflective surface is wanted, PVC specifically where grease or chemical exposure is present, EPDM where simplicity and a long track record matter, and modified bitumen on smaller or heavily detailed roofs with foot traffic. Detailing and drainage decide how long any of them last far more than the choice between them does.

Yes. La. R.S. 37:3737(I), introduced by Act 239 of 2025 and renumbered by Act 881 of 2026, requires parishes and municipalities that issue construction permits to permit and inspect roof construction and reroofing. Both the City of Gretna and Jefferson Parish issue construction permits, so both permit commercial reroofs within their jurisdictions.

It depends on whether the building sits inside the Gretna city limits. A Gretna mailing address covers both areas, and the unincorporated part is permitted by Jefferson Parish. The address decides the route, so it is the first thing we check.

International Building Code Chapter 15, the roof assemblies and rooftop structures chapter. The law splits it explicitly: subsection (I)(1) sends buildings other than one and two family dwellings to the IBC, and only (I)(2) sends houses to the residential code. Louisiana is on the 2021 editions with state amendments.

Ours covers our workmanship on the installation. The manufacturer warranty covers the system and is issued by the membrane manufacturer on its own terms, usually after its own inspection and only where the installer holds its approval. They are two separate documents and neither stands in for the other, which is worth knowing before a quote is compared on warranty length alone.

They can, and it is a common way a commercial roof gets damaged after it is finished. A mechanical or telecoms contractor cutting in a new penetration without the roofer involved creates a detail nobody has flashed and nobody has recorded. Agree a route for rooftop work at handover and keep it in the building file.

The programme is set by how much roof can be opened and made watertight in a day, because on an occupied building nothing is left open overnight. That is what makes an occupied replacement longer than the same area on an empty one, and it is why we set the day areas and the weather contingency before agreeing a start date rather than after.