Cold corners – GreenBuildingAdvisor

I’ve run into a situation that has me a little stumped. I have cold corners where the wall drywall meets the ceiling drywall in lot of places in this house. What seems weird to me in trying to diagnose whether the problem is air sealing or just lack of insulation where the roof pinches it down to where there is little to no room for insulation.  What I can’t seem to figure out is that the corners seem about the same temperature, whether after they are in an exterior corner where the roof line comes down in pinches insulation or whether they are an exterior corner where the roof line is higher up in that area.