While inspecting a six year old home yesterday I noticed what appeared to be water stains on the North exterior wall of a bedroom. The stain started at the wall ceiling junction. There were 4 stains along a ten foot section of wall.
I was thinking maybe the header above the window wasn’t insulated but there is a stain in each corner of the room which is beyond the window/header.
My guess would be no or very little insulation in these areas. When it’s cold outside the warm moist air inside must condense.
I checked the attic space above this area and noticed no baffles at the eves (in this area) and the blown in fiberglass insulation is up to the OSB at the eve. There are no signs of moisture in the attic and the roofing is in great condition.
Anyone run into anything like this or have any ideas?