You want to check the exterior of the house. Maybe you have got a gutter problem or maybe you have got landscaping problems. Before waterproofing, please try to go and look and see what the causes are. It could be some of the things that you are not going to be able to fix yourself and most professionals don't charge for a consultation. So they will come out and give you what we refer to as a free home analysis. So if you find somebody out there who's doing it at no cost, and then let them help you. The will find where the problems are and help you get some education on that. B-Dry uses a wide range of materials and all of that has been tested by independent groups and found to be very, very safe.