Mr. Basement is a Basement Systems certified contractor in greater Baltimore & Washington DC area, specializing in basement waterproofing, crawl space repair and foundation repair. We have more than 24 years of experience serving in the basement waterproofing industry, with offices in Maryland, Virginia and the Washington, D.C area and e use only the finest products available including cast-iron Zoeller sump pumps, WaterGuard basement drainage system, and the 20-mil CleanSpace crawl space liner.