In Las Cruces, most building projects go through an application review with the city before a permit is issued. I check with the office that covers your address before work starts, and if your job needs a permit, we apply, set up the inspections and keep you posted. Commercial alterations, additions or new construction valued at $1 million or more also need a pre-submittal meeting with the city first. Below that, it's optional.
Heat is the main thing we're insulating against here. A historical climate guide for Las Cruces notes that 100ºF days aren't unusual over the long run, mostly in June and July, and a metal roof in that sun pushes heat straight down into the space. The state energy code lists Las Cruces in climate zone 3B, and that zone sets what the code expects of insulation in a building here.
We do the same work across the cities around Las Cruces, including Chaparral and Anthony. Out there it's mostly metal shops, storage buildings and small offices, and the calls sound alike. The roof sweats, the office runs hot, or nobody has looked into the ceiling space in years.