In a recent survey of its members, the American Society of Home Inspectors (ASHI) found that the most frequent problems listed on an inspection report was improper grading and drainage around the exterior of the house which can cause basement moisture problems and sometimes even soil erosion which can sometimes lead to foundation structural failure. Another frequent problem area listed was the electrical system, including situations such as insufficient electrical overload protection, and amateur wiring situations which can be dangerous. Though these problems are not usually costly to fix, they may significantly influence a buyer’s purchasing decision. Roof damage and mechanical problems with the heating and air conditioning systems were also near the top of the list for frequently reported problems.