Underlayment as well as Steel Roofing-- Metal Roof Covering 101 with Todd Miller

https://www.bookmarkingqueen.win/steel-roofing-setup-2

When cozy air from the living space reaches the roof deck and creates the snow to melt, ice dams happen. The melted snow after that runs down the roofing system and refreezes over the house's cold overhangs, creating