Roger replaces the existing concrete front walk with a beautiful new bluestone design. They jackhammer out the old walk and start the prep for new. Tom shows Kevin the modifications he specified on the replacement windows to make them more acceptable to the Historic Commission. On the third floor, tile contractor Mark Ferrante, uses a shower waterproofing system made up of prefab components that can be customized for any size shower. We're not the only ones planning a modern house inside the shell of an old one—architect Michael Kim shows Kevin how he did just that in Brookline, and how modern and traditional can live in harmony. Painting contractor Mauro Henrique starts paint prep and shows Kevin the shades of yellow the homeowner is considering for the exterior.