Before work on the Carlisle, Mass., farmstead can begin in earnest, a ledge blocking its new basement must be removed and the septic system brought up to code. Meanwhile, carpenter Norm Abram examines the stone foundation under the jacked-up barn; and host Kevin O'Connor travels to Vermont to visit the Barn People, a group of craftspeople that restores old barns. On "Ask This Old House," projects include pass-through for a kitchen wall and a toilet that won't stop running. Also: "What Is It?"
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