The homeonwer living in The Plains, VA was having trouble reducing the humidity in their home all year round. During the comfort and energy evaluation it was found that the humidity source was the dirt floor crawl space allowing the humidity from the Earth to rise through the house.
Comfenergy installed dimple matting, Terra Block floor insulation, CleanSpace 20 mil vapor barrier, and then closed cell spray foam insulation. Now the humidity can be controlled as it is not allowed to enter the home.