This Old House

It's moving day in Nashville, as the renovation of the 1920s brick cottage wraps up.

Kevin finds Tom working with the new apprentices on the front door.

Kevin finds Mauro working with the apprentices to fix the plaster damage.

Kevin finds Mauro working with the apprentices to fix the plaster damage.

The Net Zero house is complete. Kevin and Tom discuss challenges with Jeff.

Kevin finds Mauro working with the apprentices to fix the plaster damage.

Tom and Kevin reinstall upper cabinets that survived the fire.

Tom and Kevin reinstall upper cabinets that survived the fire.

Tommy and Kevin cruise around Brookline in a '57 Chevy before rolling up to the latest project: a lackluster 1957 mid-century modern house in need of a total overhaul.

Zack is back!

Tom and Kevin reinstall upper cabinets that survived the fire.

Kevin joins the apprentices as they take a two-day roofing class.

Kevin joins the apprentices as they take a two-day roofing class.

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, Massachusetts.

Kevin joins the apprentices as they take a two-day roofing class.

It's moving day in Nashville, as the renovation of the 1920s brick cottage wraps up.

It's moving day in Nashville, as the renovation of the 1920s brick cottage wraps up.

Zack is back!

Zack is back!

Zack is back!

Zack is back!

After nearly two years since the fire, the triple decker is just about ready for the homeowners to return.

After nearly two years since the fire, the triple decker is just about ready for the homeowners to return.

Zack is back!

After nearly two years since the fire, the triple decker is just about ready for the homeowners to return.

Illegal fireworks caused a fire in the Dorchester triple decker and then COVID-19 happened.

Illegal fireworks caused a fire in the Dorchester triple decker and then COVID-19 happened.

Luke and Crystal are moving in. Kevin visits a fire test lab.

Illegal fireworks caused a fire in the Dorchester triple decker and then COVID-19 happened.

Tom and Kevin cross the bridge from Newport, Rhode Island to Jamestown, where they tour the next project -- a 1920s bungalow which will become a larger net zero house.

Tom and Kevin cross the bridge from Newport, Rhode Island to Jamestown, where they tour the next project -- a 1920s bungalow which will become a larger net zero house.

Tom inspects engineered siding and fire-rated sheathing.

Zack heads to Switzerland to get a first look of how the project's house wrap is made.

Tom and Kevin cross the bridge from Newport, Rhode Island to Jamestown, where they tour the next project -- a 1920s bungalow which will become a larger net zero house.

Shingles with asbestos are removed. Kevin visits a manufacturer in Pennsylvania that makes precast concrete walls.

Shingles with asbestos are removed. Kevin visits a manufacturer in Pennsylvania that makes precast concrete walls.

Five months ago this 1887 Queen Anne Victorian in Narragansett, Rhode Island was falling apart.

Shingles with asbestos are removed. Kevin visits a manufacturer in Pennsylvania that makes precast concrete walls.

Zack is back!

Zack is back!

Zack heads to Switzerland to get a first look of how the project's house wrap is made.

Zack heads to Switzerland to get a first look of how the project's house wrap is made.

Zack heads to Switzerland to get a first look of how the project's house wrap is made.

Jeff shows Kevin how he's framing the net zero house.

Jeff shows Kevin how he's framing the net zero house.

Zack heads to Switzerland to get a first look of how the project's house wrap is made.

Jeff shows Kevin how he's framing the net zero house.

New apprentices join the team in Rhode Island as the roof goes up.

New apprentices join the team in Rhode Island as the roof goes up.

Decorative Queen Anne style barge rafters are reproduced for the garage addition.

New apprentices join the team in Rhode Island as the roof goes up.

Insulation is crucial to a net zero house. Kevin finds Jeff and the apprentices starting the work.

Insulation is crucial to a net zero house. Kevin finds Jeff and the apprentices starting the work.

The original chimney inside the Queen Anne Victorian was built with a slant at the top.

Insulation is crucial to a net zero house. Kevin finds Jeff and the apprentices starting the work.

Roof insulation is next step at the net zero house.

Roof insulation is next step at the net zero house.

The updates to the 1887 Seaside Victorian Cottage in Rhode Island were reviewed by the historical commission.

Roof insulation is next step at the net zero house.

Zack heads to Switzerland to get a first look of how the project's house wrap is made.

Zack heads to Switzerland to get a first look of how the project's house wrap is made.

Zack takes Kevin through the process of framing a wall in the new addition.

Zack takes Kevin through the process of framing a wall in the new addition.

Zack takes Kevin through the process of framing a wall in the new addition.

The electrician installs a load center. Tom and apprentices put up cedar roof shingles.

The electrician installs a load center. Tom and apprentices put up cedar roof shingles.

Zack takes Kevin through the process of framing a wall in the new addition.

The electrician installs a load center. Tom and apprentices put up cedar roof shingles.

Richard watches as the home is sealed against air leaks.

Richard watches as the home is sealed against air leaks.

Original house exterior details such as the Yankee gutters and corbels are installed.

Richard watches as the home is sealed against air leaks.

Dana and Don show Kevin design samples at their studio.

Dana and Don show Kevin design samples at their studio.

Mark shows off a cobblestone apron at the driveway.

Building science expert Christine Williamson gives Kevin a lesson in vapor and condensation.

Dana and Don show Kevin design samples at their studio.

Tom discusses difference between blueboard and drywall.

Tom discusses difference between blueboard and drywall.

Tom watches ceiling mounted speakers disappear. Richard oversees the startup of a new HVAC system.

Tom discusses difference between blueboard and drywall.

Zack takes Kevin through the process of framing a wall in the new addition.

Zack takes Kevin through the process of framing a wall in the new addition.

Zack heads to Switzerland to get a first look of how the project's house wrap is made.

Zack takes Kevin through the process of framing a wall in the new addition.

Building science expert Christine Williamson gives Kevin a lesson in vapor and condensation.

Building science expert Christine Williamson gives Kevin a lesson in vapor and condensation.

Building science expert Christine Williamson gives Kevin a lesson in vapor and condensation.

Roger visits a nearby sod farm with Jenn and Kevin.

Roger visits a nearby sod farm with Jenn and Kevin.

Building science expert Christine Williamson gives Kevin a lesson in vapor and condensation.

Roger visits a nearby sod farm with Jenn and Kevin.

Kevin learns about induction cooking. Richard watches as the solar panels go on the barn roof.

Kevin learns about induction cooking. Richard watches as the solar panels go on the barn roof.

Inside, the work is busy with flooring and finish carpentry.

Kevin learns about induction cooking. Richard watches as the solar panels go on the barn roof.

The Net Zero house is complete. Kevin and Tom discuss challenges with Jeff.

The Net Zero house is complete. Kevin and Tom discuss challenges with Jeff.

Tom assists with elaborate interior window trim and custom storm windows.

The homeowners make choices about the exterior. Zack visits a factory to learn how wood fiber insulation is made.

The Net Zero house is complete. Kevin and Tom discuss challenges with Jeff.

A year after California's worst wildfire, the people of Paradise are still clearing the devastation.

A year after California's worst wildfire, the people of Paradise are still clearing the devastation.

Trees and sod are transplanted out front with Jenn, while a custom deck hatch is installed out back to access the basement.

A year after California's worst wildfire, the people of Paradise are still clearing the devastation.

Building science expert Christine Williamson gives Kevin a lesson in vapor and condensation.

Building science expert Christine Williamson gives Kevin a lesson in vapor and condensation.

Building science expert Christine Williamson gives Kevin a lesson in vapor and condensation.

The homeowners make choices about the exterior. Zack visits a factory to learn how wood fiber insulation is made.

The homeowners make choices about the exterior. Zack visits a factory to learn how wood fiber insulation is made.

The end of the project is quickly approaching and there is still much to be done.

The once rotting Seaside Victorian Cottage is restored to its original beauty under the guidelines of the Historic Commission.

The Boston neighborhood of Dorchester has always been a special place to This Old House, as it's the home of the first project.

Homeowners pick a large tile for the curbless shower, and tile setter Gary Moreland shows Kevin how he makes it work.

With the build coming to an end the whole gang comes down to help Zack and the homeowners.

Homeowners pick a large tile for the curbless shower, and tile setter Gary Moreland shows Kevin how he makes it work.

Kevin finds Ron Peik's team removing asbestos. Plumber Ronnette Taylor will tackle the dormant pipes.