Host Kevin O'Connor and plumbing and heating expert Richard Trethewey visit a local burger shop to try the new "This Old House" burger. Master carpenter Norm Abram explains the decision to use a formerly controversial exterior cladding system know as an "exterior insulated finishing system," or EIFS. Installer Dan Rourke shows Norm how EIFS product manufacturers have adapted over the last decade to solve problems with installation and water infiltration. In the library, Kevin finds general contractor Tom Silva and chimney specialist Mark Schaub installing the new gas fireplace. Kevin helps Tom demolish the old stairs and rebuild the new landings that will eventually accept a new steel stair system. In the garage, Tom shows Kevin how he's prepped for the pour of the new slab using a clever new technology: ½-inch plastic clips that fasten rebar together with one click of a specialized tool, eliminating time-consuming wire ties.