chris2inspect

OK this might be easy for you old timers but a young buck like myself got tripped up. Interior of outside walls are showing darkness on the corners and appears to follow the studs down the wall; drywall nials are also slighly visible. Paint appears to be very thin and they have never been repainted. No moisture appears to be coming from the roof to saturate the studs. Sheetrock does not act water damaged. Almost looks like smoke damage...customers say no candles or other reason for smoke damage. Any ideas? Thanks guys!