For each one-inch of rainfall, a 1,000 square foot roof will gather 600 gallons of water. Clogged gutters and poor grading tend to be the number one issue for wet basements and crawl spaces. The next rainy day check to see if the water is running freely through the down spouts and not overflowing from the top edges. Clear leaves and debris from gutters with your hand or small tool. Using a garden hose, rinse gutters to insure downspouts are free from blockages. Ideally wat