This photo simply shows the uneven earth in the crawl spaces beneath your home. Before our team starts laying down the barrier between the soil and your home, they do their best to level the ground below your home. You can also see in the image that the foundation of the home in Falls Church, VA is made out of concrete blocks. Concrete block walls have a tendency to allow moisture and outside air to seep in so we will later see that they too will be sealed off as the ground is.