Dirt crawl spaces are unhealthy, inefficient and negatively affect the rest of the house and the people who live there. There are an estimated 26 million homes with dirt crawl spaces in the United States alone - and most of them are vented. These spaces increase energy costs for their owners by 15% to 35%, and are most often damp or worse - causing mold and rot in the building. This book addresses this problem and solutions. There is no shred of evidence or science that says vented dirt crawl spaces makes sense, and tons of evidence right before our eyes that says they are a serious problem. Yet over 250,000 new homes and thousands of additions are built each year with dirt crawl spaces. The building code not only allows dirt crawl spaces, but actually made the problem worse by requiring them to be vented. Homeowners, and the U.S. economy are paying the price in so many ways. It's time for something to be done - right now.