My company, Tri-State Basement Systems, based in Berlin, Vt., concentrates on basement waterproofing and, as the radio show indicated, there is always plenty of work. Unlike most DIY efforts and "miracle coatings" that attempt to prevent ground-water entry with a barrier, our techniques don't try to stop the water, but rather to manage it. Sometimes we use exterior perimeter drains and waterproofing, but more often we install water-management systems on the building's interior. Most homeowners prefer this approach because it costs less than excavating around the foundation and is less destructive to their landscaping.

One recent project involved a 1950s ranch home with a block foundation. The basement in this house was literally soaking wet. Water running down the walls accumulated on the floor, making the space virtually unusable — even for storage. And when you opened the basement door, you were greeted by a wave of humid air and the pungent smell of mold....

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