Bob visits a Federal-style house undergoing reconstruction, as well as adding an addition, in Charleston, S.C., with contractor Richard Marks.

Bob discusses the layout of the house and its past modifications, including a new kitchen, dining, and entertainment areas.

Bob meets Arquitectonica's Laurinda Spear, an architect who has come up with some eye-catching and very tropical ideas for the project. Due to local zoning laws, the original concept of expanding onto the back deck has changed. Instead, the kitchen will be extended to the side. A banana leaf motif has been chosen and will appear throughout the addition.

R-Control has created building systems for walls, floors, roofs, and ceilings. Covered with a skin of OSB (oriented strand board) to provide an even, continuous nailing surface, these panels are made of expanded polystyrene cores to provide superior insulation without the settling or looping typical of fiberglass, rock wool, and cellulose-based insulation systems.