I have a home that I recently inspected it was built approx. 14 Years ago. The home is a steel framed home in a large subdivision. The area is fairly dry with rain winter months and very dry the rest of the time.
My question is on ever ceiling the drywall is discolored at every framing member darker I inspected the attic and it is fully insulated. Approx R 30 No signs of corrosion tot eh drywall
The ceilings have never been painted. Walls have been so I am no sure if they were discolored as well.
I did a inspection in a house in the subdivision about eight or ten years ago it was the same way.
I am sending a pic but it hard to tel from a pictures