Men's end has a small cabinet for wreck tools on the inside of the door. It was into early autumn when I could turn my attention to the next big area of work for the year, the ceilings. None of it was salvageable due to water damage. The material that best fitted this requirement is hardboard. Masonite is one of it's trade names.
Hardboard comes in two styles, tempered and untempered.
Untempered is more flexible, has a less finished appearance and is harder to find. Tempered won't take the more severe curve of the lower roof, so I shopped around for the untempered. For those seams that wouldn't be covered by the original style strips or battens, I used a flexible caulk. Commercial joint compound might have offered a smoother finish, but I was suspicious that it wouldn't be as flexible. Thanks to Linn Moedinger for the suggestion.