When basement moisture is not controlled, the results can be ugly and dangerous. This photo of a floor joist covered with wood destroying fungus was taken in an older basement that has had a long term water infiltration problem. The water on the floor becomes water vapor and saturates the basement air. The wood members absorb the moisture and in this case the percentage of water in the wood exceeded 28%. The result in this case was widespread damage and failure of the wood structure.

destructive fungus

Photo by Dennis Robitaille of Able Home Inspection