In Cambridge, Mass., the crew turns the inside of a dark, divided 1887 two-family home into an open, Scandinavian-style one-family.

Water infiltration damages the house and must be prevented from happening again; a landscape architect shows the plan for the side patio and details how it allows for ease of entry into the house and provides proper drainage.

Insulation goes up in the Essex cottage; boarding ceilings; a plastering contractor shows how to achieve a rustic look using rounded corners.

Putting up 8-inch pine shiplap barn boards on the walls at the project's entry; the finished patio and plantings.

A tile installer lays black slate tile on the floor; a mason uses structural stucco to achieve the rustic plaster look of the original chimney; how a preservation carpenter helped music icon Daryl Hall assemble and restore an 18th-century estate.

A recap of the geothermal heating and cooling system installation process and how the whole system comes together with the heat pumps in the basement.

Interior screens for the signature casement windows; installing the Dutch door for the passage between the kitchen and sun porch; sconces at the entry; LED fixtures in the trees for general lighting; wall washers at the masonry walls.