Just finished inspecting a 2007 home with attached garage. Past moisture intrusion was noted on interior side of garage walls, and exterior vinyl siding showed staining from the siding drain holes starting high up the wall (first two images). Roof was in excellent shape and I doubt that it ever leaked. Shingles extended over gutter so I don’t think the water came from the roof.
Drywall on garage interior walls showed dry staining starting at the ceiling and wicked down the untaped seams (third image). One corner had mould growth which was dry.
Anyone have a theory on where this water was coming from? I know it’s not essential for me to determine the source of the water, but it would help the client out. I like to put things like “possibly from this or that, evaluation required” in reports.