The Tunnel

S24E11 The Winchester House - 11

General contractor Tom Silva finishes installing the last historically accurate double-hung window on the sun porch as the Winchester kitchen addition nears completion. In the kitchen, mineral wool—an old-style insulation updated for modern homes, prized for fire resistance and sound dampening—is sprayed into the walls. Custom cabinetmaker Jeff Peavy walks through design and material options for the space. Roofing contractor Tom Evarts shows master carpenter Norm Abram the crew's work: architectural asphalt on the main roof and flat-seam lead-coated copper on the addition. Plumbing and heating expert Richard Trethewey demonstrates the new plastic water supply lines and the flexible 4-inch duct system for heating and cooling to host Steve Thomas.