One area you should check is the gutters and downspouts. If they are damaged in some way or have become clogged and are leaking, this can cause a pooling of water around the foundation of the home. If downspouts have been improperly installed, this can also be a problem. Downspouts need to be fitted so that water drains away from the home, 10 feet away is an ideal amount.
Another problem that may cause a damp basement is if the property has insufficient or uneven grading or slope. When there is an uneven or inadequate slope around the home, water will not be able to drain away properly and may collect in pools around the home.
Your home's location may be another factor. For example, if the home is located at the base of a hill or incline, you could see pooling water. As a solution to this, some homeowners dig small ditches, called Swales, about 10 to 15 feet away from their property which will divert water away from the home.
These are just of the ways a basement will become damp. Please feel free to contact us for more information regarding a damp basement or any home inspection query.