This home was built in the 60's and has experienced damage to the joist due to prolonged moisture. The recommended solution for the moisture issue would be to install a Sani-Dry Sedona Dehumidifier it is a revolutionary, Energy Star rated dehumidification system designed to lower humidity while removing dust and odors and an electrical outlet for the equipment. Keeping an eye on your crawl spaces can reduce the risk of costly repairs in the future.