The next time you visit the nation’s capital and happen to be stuck in traffic on 14th Street, take a good look at the roof on the Bureau of Printing and Engraving. The building’s complex, 75,000-square-foot metal roof was constructed by a company that does a lot more than roofing.

In fact, the company is called Prospect Waterproofing, and as the name would suggest, its focus is waterproofing. A lot of the company’s work is below grade, and as President Jim Stamer explains, “We do everything from waterproofing an elevator pit to the roof.” Located in Sterling, Va., Prospect Waterproofing covers the Washington-Baltimore area, as well as Virginia as far south as Richmond. The company has been in existence since 1992, the successor to other Prospect companies dating back to 1964.