Hello, Our home is at the top of the Chesapeake Bay about 15 feet from a small creek that feeds into the North East River. The house was built in the mid 40's. It has a concrete block crawlspace with a dirt floor and a bulkhead opening. The water table is only about 3-4 feet below the soil and the crawlspace stays damp. Our floor joists are damp and many rotted out with some termite damage. Not sure how to insulate the area and keep the timbers from rotting.