Crack in shower on a rear-bath
While de-winterizing the Airstream last weekend, we noticed a couple of large cracks in the shower wall, near the roof. This is on a '75 Safari (rear-bath) which is otherwise in very good condition. It is always stored outside, and the winters here can get pretty cold.
Has anyone ever had this happen, and what should I use to fix it? Also, after I started thinking about it, since the cracks are near the top of the roof, could this be a precursor to rear end sagging?
1975 Safari 23'
2004 Ford Expedition Eddie Bauer 4x4