Landscape contractor Roger Cook sets the massive bluestone treads on a stringer that appears to "float" over the new water feature. Landscape architect Greg Lombardi shows host Kevin O'Connor the low-maintenance plants he's chosen for screening and seasonal interest in the side yard. Inside, master carpenter Norm Abram meets plastering contractor Alberto Riponi to see the most challenging trim detail in the house - a narrow plaster bead that creates a subtle shadow line around every window and door. Plumbing and heating expert Richard Trethewey shows Kevin why a chiller makes sense for cooling a house on a tight urban lot. In the front guest room, flooring contractor Pat Hunt shows Kevin the new engineered floors from Europe - a 5/8-inch pre-finished red oak floor that carries a 30-year warranty over radiant heat, and locks together without glue. Rug specialist Steve Boodakian shows Kevin how he's cleaning, drying and repairing 26 of George's oriental rugs. Out front, custom door specialist Tim Forester shows Kevin a cutaway of the construction of the front door, as general contractor Tom Silva prepares to hang the door and install the hardware.