I have a 1950's ranch style home that was flipped before I purchased it. Overall they did a great job, i'm just finding little problems here and there associated with an old home. I'm trying to figure out how to diagnose a cold room. Last spring I posted on the forum and got great help in choosing insulation.
I took down two walls and filled with new/higher R value insulation. Now I've traced the cold spot that is giving me problems to the exterior facing corner. It was around 15 degrees outside when I was taking measurements, the thermostat was set at 69 in the house and the room was approximately 68 (with doors open to main living area). If I shut the door the room will drop to around 63 because of the cold corner. Measuring right where the moulding and carpet meet in the corner it was approximately 40 degrees. In the basement, right under this spot it is still 58-64. The basement room below is 64 (unfinished block walls, no insulation).
I'm trying to understand what could be wrong with the insulation or if this signifies a gap in the vapor barrier outside the room on the corner. This area is right under a window where I did replace the insulation and worked hard to make sure it was correct. New windows were put in and taking the IR gun to the windows outside I notice slightly warmer temperatures on the outside around a few sections of the window (range 15-20F). The cold spot on the wall is concentrated right at the carpet/floorboard.
Would like some suggestions on what to look at / examine and really appreciate this forum for all the guidance.
Apple Valley, MN