 Water marks down the inside of the drywall. |
 Water damage to masonite The wall here has several layers. Outermost is corrugated metal. Then masonite, studs, drywall. Interestingly, no tyvek or similar. The rest of the structure has hardiboard siding, tyvek-like stuff, OSB, studs, drywall. |
 All opened up and insulation removed |