A: Yes! I couldn’t find another and neither could the US patent office – that’s why they’ve granted me two patents on this system. The only way to permanently and consistently waterproof a basement or crawl space wall is to be able to control what happens in the space between the backfill soil and that wall. Traditional so-called waterproofing methods rely on things like the foundation wall being clean to apply a membrane or coating that will stick to that wall. Anybody who builds foundations like I have for years knows that you can’t always get ideal conditions. Foundation coatings are often applied to walls that are too hot, too cold, too wet and/or too dirty. As soil dries and shrinks away from the wall, it can cause breaches and even pull waterproofing away with it. Too much wetness on the outside of walls will eventually get into and through the walls. The American drain is a totally different type of system so none of these problems apply.