Kevin O.: Today on "This Old House," this project has two separate units -- the main house and an ADU.

And that means it needs a firewall.

We'll show you how to build one.

Jared: This is a fire damper.

Richard: And the walls are soon to be closing in, so it's a perfect time to show you how we're heating and cooling this building.

♪♪ ♪♪ Man: Ahh.

That's it.

♪♪ ♪♪ Kevin O.: Good morning and welcome back to "This Old House" and to our project here in Walpole, Massachusetts, where we are working on this ranch house built back in the 1970s.

It's a modest-sized house of about 1,300 square feet.

But the big story here is the ADU that's being added to the back.

That's an accessory dwelling unit and that's being put up for the homeowner's parents.

And our GC, Kevin Smith, is here today.

Hey, Kevin, how are you?

Kevin S.: Good.

How are you?

Kevin O.: Good to see you.

Kevin S.: Good to see you.

Kevin O.: Driveway work today.

Kevin S.: Yeah.

We're prepping the driveway for the ADU.

Kevin O.: So it's gonna wrap all the way around to the back of the house?

Kevin S.: Yeah.

So we took down about 39 trees here.

Kevin O.: Oh, wow.

Kevin S.: Brought in processed gravel.

Kevin O.: Yep.

Kevin S.: Compacted in lifts.

Kevin O.: Okay.

Kevin S.: And then we fine-graded everything.

Kevin O.: So then as I look at the new layout, obviously existing driveway in the front, but this new one sort of tucked out behind.

You almost can't see it from the street.

Kevin S.: Yeah.

They wanted to keep the, uh, the shrubs and everything here and then bring the driveway as close as we can to the shrubs so that the driveway is not seen from the street.

Kevin O.: Good.

Alright.

Well, I appreciate it.

I'll let you get back to work.

We'll check in with you later.

Thank you.

Kevin S.: Sounds good.

Kevin O.: So some of the bigger changes since we were here last.

You can see that the front porch, which was framed out, has now been trimmed out.

Everything in place except for the new decking and the treads for the stairs.

You may also remember that Zack was here helping us with the vinyl siding.

That is all up -- a deep, dark green.

And the new window trim is up as well.

So the side casings, head casings as well as the sill.

So front of the house is looking sharp.

And then that ADU work, which I was talking about, all of that is going on out back.

The ADU sits on the back of the lot.

And just as a reminder, this is all new space.

So this is new build.

Other new things that we got back here were an electrical service.

It used to be off of the front of the house, but now it's off the back.

So those conduits right here going to a new pole off the back of the lot right there.

Also new gas service.

So no natural gas here.

So they put a 500-gallon propane tank into the ground.

You can see the access hatch right there.

And then the yellow flexible pipe looks like it's about an inch, inch and a half, is the supply line.

That's gonna give us the service for the heat, the hot water as well as the stove.

Then we've got the backyard -- shared space between ADU and the main house.

Big changes back here are gonna be a new deck.

So if you look at the stone right here, that's basically the footprint.

You can see that the ledger board is in and our footings have been poured as well.

We've also installed all of the new windows and the new doors.

So there's a double slider right here to the shared space.

And then we've got this big, beautiful triple slider that leads into the original house.

Jesus, good to see you.

Jesus: Kevin, how are you doing, my man?

Awesome.

Kevin O.: I'm doing alright.

So last time I was here, you guys had the insulation up in our roof.

It looks like you continued on with the walls.

Jesus: That's right.

Last time we spoken, we are doing the roofing, and now we came in back.

And to finish this, to assemble the walls.

Kevin O.: So on the other side of these two walls, we've got our unconditioned garage.

So that explains why you've insulated it.

Looks like you have used two different types of insulation.

Walk me through that.

Jesus: That's right.

We have two similar walls.

We have an open cell and a two by six walls.

Open cell is a soft material.

Kevin O.: This is what per inch on R-value?

Jesus: We can get a 3.7 per inch on our open cell.

Kevin O.: Okay.

Whereas this wall is existing, we didn't touch it.

So we've just got the two by four dimension, which is why you have used the closed cell.

Jesus: Closed cell, we should pull R-21 minimum on the wall.

Kevin O.: Okay, so less expensive, more expensive.

So you're always trying to look for that balance between efficiency and cost.

Jesus: Yeah.

That's right.

We do that to help the builder, a homeowner to control the budget.

Kevin O.: Looks like you've got all the walls finished.

Are you guys done with insulation?

Jesus: Not yet.

Uh, we still have our crew on the other side, on the ADU just finishing up.

Kevin O.: I'll go check that out.

Thank you.

Jesus: Sounds great.

Kevin O.: Hey, Jared.

Good to see you.

Jared: Hey, Kevin.

How are you?

Kevin O.: Doing alright.

So more insulation going on back here.

Jared: We are assembling our firewall.

Kevin O.: Oh, firewall.

Tell me about that.

Jared: So a firewall is required to separate the two units.

So we have our ADU on the back.

It's connected to our living space.

The wall in between that separates the two has to be a fire-rated wall.

Kevin O.: Okay.

And the idea is basically just to slow the spread between unit "A" and unit "B"?

Jared: Correct.

Kevin O.: Alright.

And what goes into it and how do you pull that off?

Jared: Well, there's a few aspects.

We start here with our fireproof caulking.

This is gonna help seal up any penetrations that we have between our bottom plate and the top plate of our wall.

Kevin O.: So all holes are bad.

But if you can fill them up, we're much better off.

Jared: Correct.

Kevin O.: Alright.

And then specifically the firewall -- what goes into this recipe?

Jared: So the main ingredient in our recipe here is the board we're gonna use.

So you can see we have two different boards here.

This is a half-inch board.

And this is typical for all walls and ceilings of the interior of our home.

And it has a fire rating of about 30 minutes.

Kevin O.: So this is sort of how long it takes or how slow or quickly it burns?

Jared: Correct.

Kevin O.: This one gives you 30 minutes.

Jared: About 30 minutes.

Our firewall is rated to be an hour.

So for us to achieve that, we have to go to a thicker board, a 5/8 board.

Kevin O.: So again if we look at the two right there, clearly thicker.

And what's with the insulation?

Is that part of your recipe or is this... Jared: So we're also using a mineral wool in the cavity.

Mineral wool can be used as a fire block all by itself.

In this assembly, it's almost like a belt and suspenders.

We're using it in our firewall, but we're also using it for sound.

Kevin O.: Alright.

Got it.

Is that all we need or...?

Jared: The last piece of this will be our fire damper.

So in this house, we have a shared HVAC system.

They're not two independent units.

So for us to stop the spread of fire, if there was a fire ever to happen in one of the ducts, this is a fire damper.

And how this works is there's a fusible connection back here that at about 165 degrees or so, will melt the connection and it'll trigger the spring to close.

Kevin O.: Clever.

Jared: Which will stop -- If there's a fire happened to be in one of the ducts, it'll stop it from going to the other side.

Kevin O.: I mean, it sort of makes sense, right?

You go through all this effort to build this wall, and yet without something like that, you've got a giant hole in it.

And we know that heat, smoke can transfer through there.

So this is what's gonna actually plug the hole, but only when we need it.

Jared: Correct.

Kevin O.: Beautiful.

Alright.

That's nice to know.

I appreciate it.

Thank you.

Jared: Alright.

Richard: Alright.

Before this building gets completely boarded and plastered, I thought I would show you how we're heating and cooling this building.

Now, over in the main house in the basement, it was a retrofit.

Low ceilings, no place for anything, really.

So we put in the little mini ductless air handlers, the ceiling cassettes, and that's air-to-air heat pumps.

We also put an air handler up in the attic, in the old attic of the main house.

Well, down here this is a new build.

So look at this.

There's plenty of room to do anything we want.

So now you can see there's two sets of ductwork here.

One to feed the downstairs of the ADU and the other to feed the upstairs, and it runs right through here into this passageway where we now pass from the ADU to the main house.

And that's where we find Bobby Connolly.

Hey, Bobby.

Bob: Hey, Richard.

How are you?

Richard: Good.

You've been busy.

Bob: Yeah.

Very busy.

Richard: Alright, so I saw the ductwork come to right here.

And you've got two zones right here.

Bob: Yeah.

Richard: And this is the air handler for just the... Bob: ADU unit.

Richard: Okay, great.

Take us through how it works.

Bob: So basically this is your air handler unit.

You have a blower motor that's gonna suck air down this return.

It's gonna pass it up through the evaporator coil for AC in the summer.

Richard: Yep, yep.

Bob: And then it's gonna continue up.

And it's gonna go over this heated coil for heat in the winter.

Richard: So it's not a furnace.

It's actually a true hydro unit.

So heated water will pass through that coil.

And the cooling side is not a heat pump.

It's actually just conventional AC.

Bob: Correct.

Richard: Okay.

So how do you make this water hot?

Bob: So you're gonna have a supply and return on this.

You're gonna have 180-degree water coming in.

And that's gonna shoot back to your gas-fired boiler.

Richard: Okay.

Now, here's one we've seen.

We haven't seen this one before, but usually the wall hung.

So this is a floor-mounted.

Bob: Yeah.

This is a floor-mounted high-mass boiler.

So it holds about 18 gallons of water.

Richard: And it can come over to heat the water inside this tank.

So that means there's one gas bill, right?

Bob: One gas bill.

They're gonna share this.

Richard: Alright.

But the AC side though, because it's conventional, it would mean that they would pay their own electricity for the cooling side.

Bob: Yeah.

Richard: Okay.

So they have to get along with each other, don't they?

Bob: Yeah.

I hope so.

While we're talking about shared space, I have something else to show you over here.

Richard: Alright.

Alright.

What have we got?

Bob: This is the whole-house water-filtration system.

Richard: So for both the main house and the ADU.

Bob: And the ADU.

Richard: All the water.

So does Walpole have bad water?

Bob: No, it's not bad water.

It's perfectly safe.

This is just going above and beyond.

Richard: I've seen point-of-use ones, but this is interesting to do a whole house.

Take me through the steps.

Bob: You have your first-stage filter here.

This is gonna take care of sand, gravel.

Richard: Like this?

Bob: Yep.

Richard: So is this cleanable?

Bob: Yep.

Richard: So you can get all kinds of sediment.

At least you could stay ahead of it because it's the first line of defense here.

Bob: You can pop it out, wash it and throw it back in.

Richard: Alright.

And then what?

Bob: This is a carbon filter.

That's for taste and odor.

Richard: Yeah.

Bob: It'll make drinking water better in the house.

Scale and corrosion.

Richard: Great.

Bob: Also for skin and hair.

Richard: I could use a little help on both of them.

Bob: Yeah.

Richard: What about the last stage?

Bob: Last step is picking up parasites, microplastics.

Richard: All those unmentionables.

What's interesting, you know, you think about this.

It also means we could get rid of bottled water.

I mean, who doesn't want to get rid of all that recycling and everything else and know that you can trust the water you're drinking?

Bob: Yeah.

Richard: Alright.

You ready to finish up?

Bob: Yeah, absolutely.

♪♪ Kevin O.: Basements are notoriously wet, and we do everything we can to keep them dry.

And that's a lot easier with a new basement like we have here beneath our ADU.

So we'll put plastic underneath the floor.

We'll put a sump pump maybe in the corner with a perimeter drain or insulation.

That's also a vapor barrier up on the side walls.

It gets a lot harder to pull all that off in old basements, and particularly difficult where the new meets the old.

And that's what's going on right here.

So this is our new foundation for the ADU coming right up to the old foundation of the house from the 1970s.

And that joint right there is problematic.

So, Sean Hayward, you're gonna help us out with that one right there.

I appreciate that.

Sean: My pleasure.

Kevin O.: A notoriously difficult spot for water infiltration?

Sean: Exactly.

This is a cold joint.

Kevin O.: Which is what?

Sean: A cold joint is where new concrete meets old concrete.

Kevin O.: And so this is not an installation problem.

This is just sort of the realities of concrete.

And as you say, especially when new meets old.

Sean: Exactly.

Totally normal.

Kevin O.: Okay, so what do you want to do with our so-called cold joint?

Sean: Our goal is to waterproof it.

And we do that by injecting polyurethane foam.

Kevin O.: Okay.

So what's the process that gets us to that?

Sean: We start by prepping the area, cleaning the old foundation and the new foundation.

Make sure there's no debris exactly where this epoxy might not adhere properly.

So we want to get that all prepped.

Uh, next we drill ports with a hammer drill and a 5/8-inch bit.

We then adhere the ports into the cold joint, and once those ports are glued in and adhered, we let that epoxy set up a little bit.

We'll then come in with the same exact epoxy and seal up that joint from the inside.

Kevin O.: Okay, so that's already been done on this corner right here.

What do we do next?

Sean: Next step is to inject.

Kevin O.: Let's do it.

Sean: Alright.

So Max is getting ready to inject the material.

So he's setting up the gun.

Kevin O.: So two parts?

Sean: Yes, 2-part polyethylene foam.

You can see the two parts mixing together in the nozzle.

Turns that brownish color.

Kevin O.: Yep.

Sean: And as soon as he gets a lot of pressure, he'll stop and cap.

Kevin O.: Okay.

And then he just repeats the process on the way up.

Sean: Works his way up.

And then as soon as that's fully cured, we can come back, if the customer would like, and cut off these ports.

Kevin O.: And so after 45 minutes, once it's cured, do we have ourselves a watertight cold joint?

Sean: We do.

Kevin O.: That's awesome.

As we follow along with the construction of this ADU, which is an addition to the main house, we're also exploring different ways that you can build ADUs.

So have a look at what we did in Dorchester, a neighborhood of Boston, where over the past several months, a different style of ADU has taken shape.

So, Tommy, you know that Boston passed an initiative to encourage the building of ADUs, trying to do what they can to alleviate the housing crisis here.

Tommy: Yeah, they need to.

I mean, it's harder and harder for people to find living.

Kevin O.: Yeah, it's really bad.

And when we think of ADUs, oftentimes it's a separate building.

But as you know, you can add on to an existing building or you can even renovate within the building.

Tommy: That's great because if you look at the neighborhood, look at how close the houses are to one another.

They're actually built to fit the lot.

So there's no room to expand.

Kevin O.: Well, that's exactly why I brought you here to this neighborhood.

Any chance you recognize this gem right there?

Tommy: You know what?

I do.

I think I was here about 20 years ago.

The house was lighter.

I think it was a light green, if I remember correctly.

This is a new fence.

I think there was a fence here before.

Kevin O.: Good memory, Pops.

Tommy: I remember, I remember.

Kevin O.: It turns out they want to do an ADU in the house.

Tommy: Really?

Kevin O.: Yeah.

You want to go get reacquainted?

Tommy: Absolutely.

Lead the way.

I guess we'll just barge in.

Kevin O.: Hey.

We're allowed, right?

Tommy: Hey, Cara.

How are you?

Cara: Hi, Tom.

Welcome back.

Tommy: Good to see you.

Paul, how are you?

Paul: Good to see you again.

Tommy: And who's this?

Tom: I'm Tom.

Tommy: Hey, Tom.

Do you still have my hammer?

How's that?

Good?

Tom: Somewhere up there.

Tommy: Good to see you.

Kevin O.: Well, this is a nice little reunion, huh?

And look at you, huh?

Last time I saw you on the clip, just a little guy.

Tom: Yeah.

Kevin O.: So what's the story?

How'd you come up with this idea?

Cara: Well, last spring we had a decision to make.

We paid off the mortgage, and we were looking for a new project to do.

But at the same time, Tom was graduating from college, and my younger son was transferring back to Boston for school.

So we thought the project is probably to create an apartment for them.

Kevin O.: Dad, you on board?

Paul: I am.

I mean, you obviously want them to fly the coop at some point, but I think it gives them a soft landing spot, given the economics of today, the rents and so forth.

Kevin O.: Yeah.

And how about you, Tom?

How do you feel about coming home?

Tom: I'm very excited.

I think I'm very fortunate to have this opportunity.

Kevin O.: That's good.

And you showed up for an Ask segment.

I remember.

One of my first early seasons.

Tommy: "Ask This Old House," 20 years ago.

I came.

You had a broken baluster.

It was right over here.

Took a router and I drilled a hole in it and put a dowel in the center to stiffen it.

It's still holding up nice and solid.

Kevin O.: And you guys are thinking ADU upstairs?

Cara: Up in the attic.

Kevin O.: Who wants to show us?

Cara: I'll take you up.

Okay, well, that leads us to the attic stairs, which are a little steeper.

Tommy: Oh, definitely steeper.

Yeah Kevin O.: Cara, remind me, what year is the house?

Cara: The house is 1895.

Kevin O.: And you've been here how long?

Cara: We've been here a little over 22 years.

Kevin O.: So that's before the kids were born?

Cara: Yeah, I was nine months pregnant when we moved in.

Kevin O.: Wow.

So this is the only house they've ever known.

Cara: This is their home.

Tommy: Check this out.

Kevin O.: This is great space.

Cara: Lot of space up here.

So we think this is gonna be the sleeping alcove.

Tommy: Oh, yeah.

Perfect.

Cara: For a bed.

And there's gonna be a closet over here.

So we'll probably have a solid wall which will give them a space for a big desk.

Kevin O.: Okay.

Cara: And then if you come through here... Kevin O.: Does the chimney stay?

Cara: Chimney's staying.

We just had it fixed.

Tommy: Looks like it's all been repointed and rebuilt.

Cara: This space back here is gonna be the kitchen.

It's gonna be the most changed space because they're gonna blow out this, raise it up.

There'll be a big glass door and this will be his main entrance.

Tommy: So that's the entrance to get outside.

Cara: That's the entrance to get outside.

And then over here, this area is gonna be the bathroom.

We're gonna change that window so it's higher and to the side.

So a little more privacy.

Kevin O.: Yeah.

Cara: And then up here we have -- This is gonna be walled off as a mechanical room because this unit is the cooling and heating for the second floor.

Kevin O.: You get nice light through the three windows.

Cara: Yeah.

And, you know, this is gonna be a good sunny spot because we're gonna replace these windows with a custom window that is much cooler than these white, plastic, vinyl ones.

Tommy: Nice custom bay unit here.

Cara: I think so, yeah.

Tommy: That'll make a big difference.

Cara: Like a focal point.

Kevin O.: And what are you thinking about this space?

Cara: This will likely be more like a living room.

So we're picturing his TV might be able to go on this because this will be a flat wall here and maybe a sectional, coffee table, maybe a table and chairs if they don't fit in the kitchen.

We're not really sure.

It's hard to visualize now.

Tommy: Yeah, it's very hard for people to visualize the space.

Kevin O.: So you still have some cleaning out to do.

You're gonna have to find a new spot for the Harry Potter party box, as well as some others.

Where's all this stuff go?

Cara: Well, it looks like it's crowded and messy up here, but we have been emptying this out for the past two or three months.

Kevin O.: Well, it looks like good space.

You'll need a clever plan and a really good contractor.

Cara: Well, we think we found a great contractor.

We're very excited.

The architect recommended him, and he just finished doing a freestanding house.

Kind of like an ADU.

The woman is gonna move into the smaller house on her lot and rent out her larger house.

Tommy: Perfect.

Cara: Right here in Savin Hill.

And he lives in Dorchester, too, so... Tommy: Oh.

That's nice.

Cara: We kept it kind of local.

Kevin O.: Keeping it local.

So maybe you can check him out, Tommy.

Cara: Yeah, we have him here.

We'll go get him.

Tommy: Okay, great.

♪♪ So, Gareth, this is gonna be a pretty exciting project up here for you.

Gareth: Yeah, definitely is, Tommy, Tommy: What have you got?

600 or 700 square feet?

Gareth: It's around 700 square feet, yeah.

Tommy: Nice.

Alright, so demos first, right?

Gareth: Yeah.

Demo's the first -- Get everything cleared out here.

Tommy: And then what about the subfloor?

Is it all coming up?

Gareth: Subfloors are all coming up.

We'll add a soundproofing insulation in between the two, any of our piping and stuff like that that needs laid first, our mechanicals, we'll do that, then we'll relay our subfloor.

Tommy: And then you've got to deal with this, this right here.

This is the heating and cooling for the second floor.

You gonna build D-walls to hide a lot of this stuff in here?

Gareth: Yeah.

We'll build new walls there.

So we'll move this return over the wall here so that we have our mechanical closet inside there.

Tommy: That's gonna make it really nice up here.

Tommy: It definitely will.

Tommy: Alright.

So when do you expect to get started?

Gareth: We're probably about two or three weeks away from permitting hopefully.

So as soon as that's through, we'll go from there.

Tommy: Well, I can't wait to get started because I want to come back and see how you're doing.

Gareth: Perfect.

Looking forward to it.

Tommy: Alright.

Can't wait.

Kevin O.: Once the permit was in hand from the city of Boston, Gareth and his team of subcontractors spent the next seven months turning this attic into a new ADU.

As the project progressed, they added new subfloors topped with hardwood.

With the flooring installed, finish work came next.

Interior paint, new plumbing fixtures and appliances and finally move-in day.

So seven months, Tommy.

They got it all done.

Tommy: Yeah, that's a lot of work, a lot of work getting the stairway up here, too.

It's beautiful.

Kevin O.: But his own private entrance to the unit, which is key, so... Tommy: Hey, Tom, how are you?

Beautiful.

This is wonderful.

Kevin O.: Tom, good to see you again.

Tom: Good to see you.

Kevin O.: You're all moved in?

Tom: Yeah.

Just getting settled in now.

Tommy: How about a little tour?

Tom: Yeah.

Well, you made it to the kitchen.

It's pretty small, but there's definitely a lot of storage.

Kevin O.: May I?

Tom: Yeah.

Go for it.

That's my little mudroom area.

Tommy: Oh, look at that.

Tom: For shoes and clothes.

Kevin O.: Tucked in underneath the roof line right there.

So really grabbing all the space you can.

Tom: Exactly.

Yeah.

Tommy: Nice little convection oven and microwave.

Nice.

Cooktop.

Tom: Oh, yeah.

Induction.

Tommy: Induction.

Nice.

Kevin O.: More storage?

Tom: That is actually the laundry room.

So I have a combination washer-dryer.

Tommy: They're pretty good, I heard.

Tom: They're really efficient.

Tommy: Very nice.

You got your own place.

Kevin O.: It's like a little yacht you got going on here.

Tommy: You got your own refrigerator.

Tom: Yep.

It works.

Tommy: Wow.

Look at the light in here.

Tom: Yeah, this is like the little living area.

Um, got more storage.

I've got a little work area, desk thing right here.

Tommy: Original stairs, new treads and risers.

Tom: Yeah, goes right down to the house.

Tommy: Looks great.

Tom: The sleeping area right behind.

Kevin O.: Oh, yeah.

Nice little nook for the bed and the workspace.

Tom: Definitely.

Tommy: Can't have enough storage area, that's for sure.

Tom: Got my little bathroom right in here.

Heated floors.

Nice big shower.

Kevin O.: Cozy, but also super efficient.

Tom: Yeah.

Really efficient.

We even got the HVAC and the heating for this unit put up in the ceiling.

Kevin O.: So you guys had some ductwork to hide?

Tom: Yeah, we had a lot of ducting up here, big condensers and everything.

And we put it behind this sort of panel wall.

Tommy: Oh, look at this.

Tom: This just pulls.

Tommy: Look at that.

Nice.

You can see the water heater in there, the ductwork.

And I can see there's, like, sound deadening right here behind all the wooden strips.

Nice.

Kevin O.: And so what are you on the hook for, Tom, in regards of utilities?

Tom: So I'm only on the hook for electricity, but that's everything.

That's my HVAC, my hot water and then the lights.

Kevin O.: So everything you need, and that's just one bill.

Tom: Yeah, exactly.

Kevin O.: That's awesome.

How about this, Tom?

Remember how small that old window was?

Tommy: It was an old window, really leaking bad.

They moved it out and dropped it down close to the roof.

What a difference.

Kevin O.: Oh, yeah.

So now we got Mom and Dad in our building.

Hey, gang.

Cara: Hi.

Welcome back.

Kevin O.: Yeah.

Thank you.

So, uh, what do you think?

Cara: Oh, we're extremely happy.

Couldn't be more impressed with how it turned out.

Tommy: Yeah, this -- this looks really great.

Did you have any issues with anything?

Gareth: Nothing major.

No, just it was tight space, so getting access and stuff like that until we got the back stairs made was awkward, but everything went well.

Tommy: Tight space, a lot of angles.

Kevin O.: Your thoughts, Paul?

What do you think?

Paul: I'm happy.

Really happy with the work that's done.

I think it all went according to plan, so... Kevin O.: Well, welcome home.

Thank you for the help and thank you for the hospitality.

We really appreciate it.

Cara: You're welcome.

Kevin O.: Alright.

Well, we're gonna sign off from our ADU here in Dorchester.

But we are right back to work on the main house and our ADU in Walpole.

So signing off for everybody, until next time, I'm Kevin O'Connor for "This Old House."

Kevin O.: Next time on "This Old House," our homeowners are using LVT or luxury vinyl tile in their house.

So I've come to North Georgia to see how it's made.

Zack: So I'm in the mudroom here and I'm loving this wainscoting.

So can I get stuck in here and help you today?

Man: Sure.

Why not?

Kevin O.: And we'll show you how to install a smart light-switch system.

That's next time.