The Winchester, Mass., house gets some unexpected exposure: neighbors have removed hemlocks from their backyard. Inside, chimney specialist Mark Schaub breaks up an old flue using a centrifugal hammer. Meanwhile, carpenter Norm Abram tours a new Colonial Revival house built on the site of a 1950s ranch house. On “Ask This Old House”: Plumbing-heating expert Richard Trethewey fixes a leaky faucet and tries to see why a washing machine is making a loud noise. Landscaper Roger Cook cleans a slippery brick walkway using a pressure washer. And Cook, Trethewey and contractor Tom Silva try to figure out what to do with unfamiliar objects. Steve Thomas hosts.