Our host recounts the latest Historical Commission meeting, in which the original approval of the carriageway was sent aside and the whole issue reconsidered. Because of discrepancies between the drawings and the actual house, the commissioners vote to visit the jobsite, see a mock-up of the carriageway, and vote on its appropiateness at a later meeting. Kevin Guinee expresses his frustration at not knowing whether or not that part of the project can move forward. Around back, the crew is replacing the crumbling wood side with a cement-based clapboard that's 60% the cost of cedar. Up on the roof, our host watches as roofer James Shea pulls out and replaces a broken slate; 100 more to go. He also is replacing the old zinc hip flashing with copper fastened with brass screws. The guys review progress in the rebuilt kitchen shed addition, in which Tom Silva used a keyed system of engineered beams to carry the weight of the exterior wall above over a wide span. They install two skylights in