Kevin joins the legions of Cambridge locals by biking to work on a vintage bicycle restored locally. Landscape architect Greg Lombardi presents a plan for a yard that combines both traditional and modern elements. Tom shows Kevin how he's gotten rid ... (more)of the steps to the roof deck by dropping the structure into the ceiling of the second floor. Roger arrives to tackle the giant stump left over from the old Norway Maple, first with a chainsaw, then a stump grinder. Richard shows Kevin how they've kept the ducts out of the roof rafter bays to preserve that space for insulation, and on the second floor, how they've hidden the air handler at the top of a hall closet. The plumbers have also been creative by using cast iron on the vertical runs of waste pipe in the bedrooms to dull sound, and by using a new polypropylene green pipe for supply lines as an alternative to copper. The new system incorporates connections that are fused using high heat.