So we just moved into a new construction in the middle of December. Today, while at home with the kiddos, my wife notices some wet spots in the exterior wall/ceiling joints, one of which has started to freeze. The builder sent out a foreman to inspect and he says to my wife, that there is just nothing he can do and that we just have too many people under one roof. He left a hygrometer at the house to measure the humility, which is currently reading in the mid 20 percent. We have not had any condensation on or windows as of yet, even with the extreme cold temps. I'm no contractor/builder, but the Engineer in me says that this is an area that has been poorly insulated and the cold wall is drawing moisture out of the air. There is NO reason that my walls should be getting cold enough to freeze water. Anyone else ever experience this problem? What was the root cause, fix? Was it a new build? Did your builder resolve the issue, or was it a fight?