— Some fathers hand their sons a watch or a toolbox. Assaad Eldik handed his son a roofing company, and with it a way of working that took three decades to build. Eldik founded Armour Shield Roofing in London, Ontario, in 1996. Today his son Rodney runs the company’s operations in the Greater Toronto Area as general manager. Between them, the family business has worked on more than 4,000 homes. In an industry where firms come and go with the hou…