Last winter I developed an interesting situation. Two walls started showing some condensation on one bitterly cold day, and both walls are in my foyer.
And how did I find this out? My two home inspectors (Rotley and Ruggles) were studying the condensation. Rotley was dabbing at it, and Ruggles was reading it as if it were the Rosetta stone.
I think the insulation may have packed down. Has this happened to anyone?