Winchester, Mass., homeowner Kim Whittemore explores exterior-paint options, and plumbing-heating expert Richard Trethewey shows his radiant-heating plan for keeping the outdoor steps leading to the basement ice-free in winter. Meanwhile, homeowner Bruce Leasure and carpenter Norm Abram examine roofing choices; and host Steve Thomas visits photographer Arthur Griffin, a Winchester resident known for his pictures of baseball Hall-of-Famer Ted Williams. On “Ask This Old House”: projects include painting a pre-hung six-panel door, installing a power outlet in a dining room and replacing the string on a weed trimmer. Also: contractor Tom Silva makes a “Housecall” to replace a rotting basement window frame and install a dryer vent.