As a Contractor for my Company, Finest Contractors Incorporated, which includes 10 employees and my-self included we insulate building and home foundations. Being in this business for many years, one of the biggest complaints or problems, with homes or building offices are wet basements. The only permanent way to fix or waterproof a basement would be to dig up the surrounding area of the building structure and put a membrane, which is a thin, lining on the outside of the walls of the structure.
Aside from the every day problems associated with being a contractor. We generally need to shop for tools, adhesives, paints, safety gear, and other hardware supplies. The most cost effective and least expensive products to buy, I would look for discount wholesale products to purchase supplies for my business.