Tom shows Kevin how the red cedar sidewall shingles are installed in decorative courses, designed by Holly in a classic turn-of-the-century pattern. Tom shows Kevin the most complicated part of the job - braiding the shingles to cover both the outside and inside corners. Norm uses a template and router to cut holes in the old barn door for the new windows. Kevin lends him a hand reinforcing the back of the door and then setting the first window, which gets inserted from the back in order to maintain a low front profile. Richard shows Kevin the compact wall-mounted condensing boiler that will save space and energy and virtually eliminates boiler noise - it's quieter than most refrigerators. In Spring Green, Wisconsin, insulating glass expert Tom Kaiser shows Kevin how residential window glass is coated with silver for energy efficiency, then sandwiched together and injected with argon to form insulating glass panels. Back in Concord, Jeff meets with Roger and landscape architect Stephan