Ask This Old House

Landscape contractor Roger Cook is on a special mission to pick the perfect Christmas tree at a local tree farm. Later, up in the loft, Roger shares a few tips for keeping Christmas trees healthy throughout the holiday season. Then Roger, host Kevin O'Connor, plumbing and heating expert Richard Trethewey and general contractor Tom Silva try to answer the question, "What is it?" Afterward, Tom heads to Florida to show a homeowner the proper way to caulk a leaky window.