Ask This Old House — Episode 20: Insulating Ductwork; Maintaining Clothes Washers and Dryers

You are watching the episode Insulating Ductwork; Maintaining Clothes Washers and Dryers Plumbing and heating expert Richard Trethewey visits Cortland, Illinois, to learn how corn is harvested and then to help a homeowner insulate ductwork. Landscape contractor Roger Cook demonstrates proper pruning technique. Roger, Richard, host Kevin O'Connor, and general contractor Tom Silva ask "What Is It?" Kevin learns how to maintain washers and dryers.