Its truly amazing how a roof transforms a building! The original roof was simply tin over lathe. No insulation, no additional structure. When time, weather and human wear and tear left holes and damage to the original tin, it began to rust, nails started to pop, and the weather lifted entire sheets causing them to flap in the wind and eventually fall off entirely.
The new roof has the appropriate sheathing, roof wrap and a higher grade of tin. Its designed to last another 100 years (hopefully).