While the apprentices get a lesson in roofing, Kevin visits Rhode Island to watch how an elaborate Chippendale railing is put together. A new slab of concrete goes in the basement for moisture prevention, and Richard shows how ductwork is put together.
Tommy builds a shower seat made of foam, and Richard connects steel piping. Then, Tommy shows how to install replacement windows and teaches Kevin and Joe how he makes a jig for the exterior shingled flair detail.
Granite goes down for the wood stove, and Nathan installs the porch ceiling. Then, Richard reviews the placement of components at a mechanical wall, and Mauro Henrique shows how to repair holes in old plaster.
Tommy trims the rough interior columns, and homeowner Liz makes a stained glass window. Then, Kevin tours a flooring factory in Pennsylvania, and Norm shows Kevin a few new tricks he learned for installing stair treads.
Norm installs an old door in the hallway while Roger watches a stone wall being installed in pre-made sections. Kevin visits a career day for the trades, and Tommy re-installs a corner cabinet in the dining room.
Tom and Kevin show the 1920s Jamestown, RI, bungalow that will become a larger net-zero house, and they meet the family and builder. Then, Richard and Kevin visit another net zero home, and demo begins.
Asbestos shingles are removed. Then, Kevin visits a manufacturer in Pennsylvania that makes precast concrete walls and gets a historic tour of Jamestown, RI. After the hole is prepped, the foundation wall panels arrive and are placed.
Jeff shows Kevin how he's framing the net-zero house. Richard demonstrates heat loss and gain to design a balanced HVAC system, and he visits the International Builders Show. Now that the house is open, Kevin can see the old wiring and plumbing.
New apprentices join the team in Rhode Island as the roof goes up, and the homeowners visit a cabinet showroom to finalize their plans. Then, the house gets sheathed, and it's the finish line at the house in Charleston, SC, so Kevin and Tom take the grand tour.
Insulation is crucial to a net-zero house, and Kevin finds Jeff and the apprentices starting the work. Homeowner Dana shops for efficient yet decorative lighting. Then, Tom and Jeff work with the apprentices to build false rafter tails, and they install them.
Roof insulation is the next step at the net-zero house. Then, Richard tours the basement of The Breakers in Newport, RI, and Kevin meets Congressman Norcross, who is also an electrician. Apprentices install and flash windows.
Tom teaches the apprentices the correct application of cedar roof shingles, and Kevin and Jeff add basement insulation. Then, Tom shows Mary how to block behind walls with future cabinets and fixtures, and a post and beam barn gets raised.
The home is sealed against air leaks, and Kevin sees the landscape plan. Then, Jeff fabricates porch columns and rails, and Tommy puts on shingles as the final layer of the exterior wall system.
Kevin shows interior design choices, Richard demonstrates how a heat pump works, and a wall-hung toilet tank is installed behind the wall. Stone veneer is applied at the Idea House in Narragansett, RI.
Tom discusses the differences between hanging blue board and hanging drywall, and Richard learns about the process to size a solar array. Plus, Jeff and Tommy install a wood ceiling, and Richard visits a boat building school.
Roger visits a nearby sod farm with Jenn and Kevin, and Richard inspects the HVAC installation. A gas fireplace goes in the living room, and Tom and Jeff attach screens on the side porch. Outside, a new well is dug to provide water for the landscaping.
Kevin learns about induction cooking, and the solar panels are installed on the barn. Outside, Jeff installs a unique lattice, and Richard demonstrates how an energy recovery ventilator works. Jenn finds the landscaping and hardscaping is well underway.
The net-zero house is complete. Kevin and Tom discuss challenges with Jeff, and Kevin tours the yard and barn. Tom checks out the upstairs bedrooms and the main floor. Then, Richard reviews mechanicals, and everyone gathers in the transformed kitchen.
Tommy and Kevin cruise around Brookline, MA, in a 1957 Chevy before rolling up to the latest project: a lackluster 1957 midcentury modern house in need of a total overhaul. They learn about the full scope of work from the homeowners and architect, then demo begins.
While old fixtures are salvaged, and asbestos is removed at the house, Norm, Richard and Kevin head back to where it all began 40 years ago in Dorchester, MA. Later, Roger starts to remove a tree that's threatening the property.
Norm teaches the apprentices how to lay a sill on the new foundation, while Richard scopes the sewer to see what might be lurking inside. Kevin, the homeowners and their designer start in on a plan to create a sleek, modern space.
The foundation of the house has no footings, so Mark McCullough pours a buttress. Kevin visits the 2001 Manchester, MA, project. Back at the house, Richard solves a ductwork puzzle, while Kevin and Tommy install a PVC trim overhang.
Kevin meets electrician Heath Eastman to learn about in-counter outlets. Tommy visits former apprentice Nathan Gilbert to see what he's been up to over the past year. Back at the house, Norm teaches an apprentice how to frame a skylight.
Jenn and the homeowners select pavers for hardscape. Tommy and Norm install a skylight in the bathroom, and the sewer line and water main are completely replaced out front. The original foundation is also repaired.
Tommy teaches Kevin how to calculate the riser height for a set of stairs. The foundation is insulated with a DIY foam system, and radiant heat is installed. Then, Norm and Richard head to Santa Fe, NM, to visit the project they did 30 years ago.
Tommy shows Kevin the careful process of installing rafters for a cantilevered roof. Inside, Richard solves a venting problem for the kitchen sink before tackling the AC ductwork puzzle. Later, Tommy and Kevin install snow cleats on the roof.