Does a Metal Roof Required an Underlayment?
https://www.kilobookmarks.win/underlayment-as-well-as-metal-roof-covering-steel-roofing-101-with-todd-miller
This is often completed making use of vinyl-backed fiberglass insulation to prevent moist air from entering into call with the cooler metal roofing system (which may be at or listed below the humidity). Adding