As Bud Adams drives his 11-year-old granddaughter around Baltimore, he points out the Inner Harbor and Johns Hopkins University.

He shows her these locations not just because they are city landmarks, but because both were built with pavers purchased from Adams’ 100-year-old company Belair Road Supply Co. Inc.

Adams’ daughter, Stephanie Germano, recalls him doing the same thing when she was growing up.

Germano, the CFO of Belair Road, and her brother Mark Adams both work for the company that…