When crawl spaces are made from concrete blocks like the one in this Irvington, NY home, we recommend installing our WallCap Block Wall System along with the CleanSpace Crawl Space Encapsulation System to fully seal the area and keep moisture out. The plastic coverings seal off the open cavities in the block, and they are mechanically attached to the concrete so they will never detach. This small detail can make a huge difference in whether a crawl space is wet or dry.