For decades, building codes and conventional wisdom prescribed ventilating crawl spaces with outside air as the primary means to control moisture in crawl space foundation homes. Because of this, many homes built on crawl space foundations in the Southeastern United States have suffered from poor moisture management within the structure and also the ailments caused by excessive moisture.
Research and now actual usage has shown that closing the crawl space, so that the crawl space has NO ventilation to the outside, can provide greatly improved moisture control and results in significant energy savings when installed properly.
