This is from a recent house where the homeowner mentioned problems with: musty odors in the basement, huge electric bills from their humidifier running, problems with mold and mildew cropping up through out the house. Guess what the basement humidity was and how they were dealing with it?
While there isn’t a shot of it here, the basement was a great example of issues with modern construction. It was a perfectly fine formed concrete foundation built around 1980. Even had bitumen exterior damp proofing. But the concrete was drenched through because of persistent exterior moisture on two of the house facings. And that was reflected in the basement humidity and humidity through the building.
The high humidity levels were permeating through the house, condensing whereever a surface dipped below the dew point usually on exterior windows. Problematic to say the least.