Sixty years ago, my father Edward “Lee” Schield rented a 10-feet by 12-feet garage in Medford and started making aluminum windows. He sold them personally, door-to-door, from the trunk of his car.

Weather Shield Windows & Doors, the Medford-based manufacturer of luxury windows and doors with a factory in Park Falls, was sold to Pella Corporation at the end of July, according to a Pella press ...