Water is your home's worst enemy. It does more damage to houses nationwide that fire, earthquakes and termites combined, yet 95% of the problems can be managed or significantly reduced with basic improvements to existing grading and drainage. The illustration shows many of causes of wet basements and crawl spaces. Nearly all water comes from outside the house and improvements should be made at the source. Talk to your inspector about reducing water problems. He may be able to point logical, low budget techniques that will help.