Building permits in Lake Charles come from the city's Permit Center. Calcasieu Parish requires a permit before any remodeling or renovation project, and its list names re-roofing but not spray foam, so the list alone doesn't settle your job. We check with the city or parish office that covers your address before we start, and if a permit's needed, we apply and keep you posted. If you'd rather ask yourself, the Permit Center's number is 337-491-1294.
Our humid weather decides how a foam attic gets built here. Vents or leaks in a spray foam attic let in moisture that causes problems, so these attics are sealed with no vents. Extension advice for the Gulf region says a sealed attic in a warm climate needs a slight A/C supply and return to keep its humidity down, and that open-cell foam is OK here with indoor humidity control and more forgiving of roof leaks.
The same advice says a sealed foam attic shouldn't hold fuel-burning equipment unless it's the direct-vent, sealed-combustion kind that draws its air from outside, so I note any gas furnace or water heater up there at the estimate. Around Lake Charles, and in Sulphur and Moss Bluff, we see a lot of ductwork running through hot attics, which is often what makes foam worth a look.