Ask This Old House

NOLA copper lantern fixtures; why toilets overflow; restoring rusty outdoor furniture.

Swapping a coastal home's gravel driveway for seashells; installing a radon mitigation system.

Removing ring stains from a wood table; breaking down the types of soil and fertilizer needed for common indoor plants; repairing a brick floor's crumbling mortar using spot pointing rather than a full repoint job.

Kevin meets with an audiologist to discuss the importance of hearing protection; Richard, Nathan, and Heath modify a linen closet to install a stacked washer dryer unit.

Lee plants a row of arborvitae trees for a privacy border; Mark breaks down the tools used for fireplace maintenance; Tom and Kevin build a simple, cost-effective storage rack for container totes.

Jenn visits a sod farm to learn about sustainable grass alternatives; Tom and Kevin discuss common types of nail designs; Heath brightens up a dark driveway and connects the lights to a smart system.

Nathan visits his former Navy Seabees base where he learned carpentry as part of his naval training; Tom and Kevin talk all about trailer hitches; Mauro repaints a galvanized stair railing.

Lee regrades a backyard and demonstrates how to plant a healthy new lawn; Jenn showcases houseplants for any lighting conditions; Nathan helps a homeowner replace his hollow core doors to solid core.

Nathan Gilbert helps a homeowner organize her garage by installing an overhead storage rack for easier living; Heath Eastman demonstrates how to upgrade to a 3-way smart switch; Richard Trethewey demonstrates how to extend the life of a tank-style water heater by replacing the anode rod.

Jenn Nawada travels to Idaho to revamp a backyard of a homeowner who hosts weekly potluck dinner parties. His Monday Night Dinners now draw up to 100-200 guests, overwhelming a space not built for crowds. Jenn and the community redesign the yard for smoother flow and function. Then, Mark McCullough replaces two rusted window wells, demonstrating proper removal and installation.

Richard Trethewey shows a clever toilet flange repair kit that eliminates the need for a wax ring and has a rubber seal that adjusts to any flange height, making bathroom floor updates easier. Then, Lee Gilliam and Kevin O'Connor share essential upkeep to keep a gas mower running like new. Nathan Gilbert helps a homeowner turn a bar closet into a mini speakeasy with a hidden bookcase door kit.

Mauro Henrique shows how to repaint a damaged ceiling and avoid tape mishaps. Heath Eastman, Ross Trethewey, and Kevin O'Connor discuss utility energy meters, comparing the old analog to the new digital and smart meters. Nathan Gilbert and Kevin compare vinyl, wood, and fiber-cement siding. Tom Silva demonstrates how to stop hardwood floor squeaks with a clever DIY fix.

Ross Trethewey upgrades a home to a solar-assisted split heat pump water heater, ideal for cold climates. Kevin O'Connor and Jenn Nawada discuss 3 common houseplant pests- mealy bugs, spider mites, and fungus gnats. Jenn shares some simple tricks to banish them. Nathan Gilbert solves a tough attic access issue by installing a new hatch and pull-down ladder.

Mauro Henrique shares how he cleans up paint when some spills on the floor. Heath Eastman breaks down how 3-way switches work and common wiring mistakes with a clear demonstration. Nathan Gilbert and Lee Gilliam install a classic wooden split rail fence to prevent cars from parking on a homeowner's front lawn.

Tom discusses common types of caulks and sealants. Richard installs a garbage disposal with an air switch controller. Kevin is joined by Wendy and Kaden, hosts of the popular channel "Toys and Colors," to build a children's dress-up closet.

Lee heads to Washington state to uncover why the Pacific Northwest is the heart of Kentucky bluegrass seed production. Mark breaks down popular paver types and walkway patterns. Nathan teams up to install a porch swing.

Richard Trethewey breaks down why sink clogs happen, how to prevent them, and why chemical drain cleaners can do more harm than good. Richard offers safer maintenance alternatives. Mauro Henrique demonstrates how to test for lead-based paint, comparing rapid tests to a professional analyzer. Then, Mark McCullough installs granite hillside steps, creating safer access to a backyard fire pit.

Nathan Gilbert upgrades shutters in a historic New Orleans neighborhood, matching the original style and material. Jenn Nawada and Lee Gilliam explain how to read fertilizer labels and choose between organic and synthetic options. Heath Eastman upgrades battery-operated smoke detectors to a hardwired combo alarm system. Heath asks a local fire chief for safety tips on installation beforehand.

Mauro Henrique helps a mom-to-be refresh a nursery, repainting pink walls a soft green and creating a playful accent wall with hand-drawn arches using simple tools. Jenn Nawada explains the truth behind common plant misconceptions. Then, Mark McCullough helps a couple install a pea gravel patio using a binding agent to keep stones in place.

Nathan Gilbert installs top-down, bottom-up shades to block the outside view for a tiny guard dog while still allowing sunlight into the house. Richard Trethewey explains toilet tank anatomy, common failures, and how to fix a running toilet. Jenn Nawada tackles a steep front yard, reshaping the slope and adding erosion-control plants to create a safer, more attractive landscape.

Heath Eastman shows a homeowner how to run underground power from his house to a new shed, including trenching, conduit, wiring, and installing a panel. Mauro Henrique explains the basic tools and supplies needed to paint a room. Then, Kevin O'Connor hosts a friendly kitchen quiz, testing Richard Trethewey and Jenn Nawada on which food scraps belong in the garbage disposal and which in compost.

Tom Silva teaches Zack Dettmore how to turn a flower vase on the lathe. Jenn Nawada explains how to start seeds indoors before spring planting. Mark McCullough breaks down common mortar cracks in fireplace hearths and surrounds. Ross Trethewey upgrades a finicky garage door opener by adding a Wi-Fi hub so that the doors can be controlled and monitored remotely with a smartphone.

Lee Gilliam and Kevin O'Connor cover lawn-mowing basics, from choosing the right mower to preparing and mowing a lawn. The team shares expert tips for vetting and hiring a trustworthy contractor to avoid costly mistakes. Mark McCullough heads to Washington state to replace a bumpy flagstone path with a smooth, durable concrete paver walkway.

Richard Trethewey and Nathan Gilbert assist a homeowner with a couple upgrades to make her bathroom better suited for aging in place; After being denied by gutter companies and local handymen, a homeowner's last hope is to call Tom Silva and Nathan to help replace her rotten wooden gutters.

Mauro Henrique demonstrates how to repair cracked drywall; the team tries to guess the correct use of Tom Silva's black inflatable square; Mark McCullough walks through the evolution of bricks; Richard Trethewey shows a homeowner two different types of covers to upgrade his radiator baseboards.

Jenn travels to Florida to assist a homeowner in choosing tropical trees for his backyard; Nathan demonstrates a tool that makes asphalt roof work easier; Ross showcases some smart light products.

Mason Mark McCullough helps a homeowner take care of a pitch issue on their granite front steps. After repairing the water damage, the two work together to replace the tread with perfect pitch.

Nathan installs a bathroom recessed cabinet; Mark repairs a chimney crown; Mark shares some items he's found while doing jobs.

Jenn solves a homeowner's gutter runoff problem by installing a dry well and popup emitter; Ask This Old House spotlights lead carpenter Lasana Harper; Heath helps a homeowner replace a ceiling fan.

Kevin teams up with a wallpaper expert to create an accent wall in Miami; Lee demonstrates a variety of sprinkler heads; Richard installs a submersible sump pump to solve a flooded basement problem.

Ross investigates an excessive dry air issue and installs a whole house humidifier; Mauro shares his technique for painting shutters in bulk; Tom and Kevin build a triangle outdoor end table.

Mark McCullough fixes an uneven paver patio that has lifted and shifted over time and demonstrates the proper techniques of creating a patio that will last; Nathan Gilbert and Kevin O'Connor talk all about common types of ladders including styles, accessories, and how to use them safely; Heath Eastman helps a homeowner cut her car charging time in half by installing a Level 2 EV charger.

Nathan Gilbert replaces a homeowner's broken double trash can pull out with a new one that will smoothly slide in and out from the cabinet space; Heath Eastman gives a brief history of household light bulbs and explains why incandescent and fluorescent lights are being phased out; Lee Gilliam helps a homeowner's curb appeal by removing overgrown arborvitae trees.

Mark McCullough travels to Detroit to help a homeowner make a gravel foundation for a shed; Tom Silva and Nathan Gilbert walk through the anatomy of framing an interior non-load bearing wall with a door opening and share their tips on how to build one; then Nathan helps a homeowner hide their laundry area by installing a partition wall with bifold double doors.

Richard Trethewey assists a homeowner through the process of converting a wood burning fireplace to gas, assembling a team to do the electrical, gas hookup, and insert installation; Tom Silva brings in a metal, pointy item for the crew to guess What Is It? Nathan Gilbert helps a homeowner install flat panel wainscoting in his dining room.

Jenn Nawada meets with a Detroit beekeeper and learns about bees, how honey is harvested, and tips on how to start your own hive; Ross Trethewey, Heath Eastman, and Lee Gilliam share a few phone apps they've been using in the field lately that has made their work easier; Tom Silva and Kevin O'Connor build a step stool using a mobile CNC router.

Mauro Henrique helps a homeowner paint his wainscoting by using an airless sprayer; Kevin O'Connor, Ross Trethewey, and Heath Eastman discuss how a growing number of homes are going all electric and how it compares with fossil fuels. They share what homeowners should research before making the switch; Nathan Gilbert helps two young brothers build a sandbox for their very own digging area.

Ross visits a company in Austin that is 3D printing homes; AskTOH spotlights a dedicated Detroit landscaper; Tom and Kevin turn a square bowl.

Mauro helps a homeowner paint his unfinished stair treads and handrail; the team shares a few new tools they've been using lately; Heath installs wall sconces above a fireplace.

The team builds an outdoor shower for a Cape Cod couple. Jenn and Mark focus on the layout and drainage; Nathan installs the enclosure; Richard makes the water hookup and installs the shower system.

Lee and an arborist diagnose a diseased pine tree; Lee sees how the treatment plan worked and learns about other fungal diseases; Nathan performs a new homeowner walkthrough checklist.

Richard demonstrates how to clean and maintain a mini split; the guys play What Is It; Mark and Jenn team up to help a homeowner upgrade her house's curb appeal by building a garden retaining wall.

Lee explains and demonstrates dethatching and aerating; Heath investigates a high electrical bill by installing a smart home energy monitoring system; Tom and Kevin go over the basics of routers.

Lee helps a homeowner add a new zone to her irrigation system; Richard weighs the pros and cons of PEX and copper; Nathan repairs a door hinge that's fallen out of the old, stripped screw holes.

Jenn travels to Detroit to learn about urban pollinator gardens and plants an herb garden; Tom demonstrates impact drivers versus power drills; Mark replaces a brick driveway apron with cobblestones.

Ross pinpoints the root causes of a home experiencing hot and cold spots and offers solutions; AskTOH spotlights metal fabricator, Shelby Barnhart; Mauro demonstrates how to remove shellac from wood.

Ross explains common ductwork noises and shares some solutions; Lee demonstrates how to fix a dead lawn by aerating and overseeding; Mark repairs cracked stucco over a concrete foundation.

A tribute to landscape contractor, Roger Cook. A man whose genuine kindness and passion for his craft was able to transcend the screen, making viewers feel like they were learning from an old friend.

Tom and Kevin build mudroom cubbies for storing coats, shoes and accessories; Mauro and Kevin then finish it off by painting the cubbies burgundy; Jenn goes over different types of mulch.

Nathan recounts his time as a Boy Scout; Tom and Kevin build a hexagon herb planter; Jenn shows materials needed to build a raised planter; Jenn and Nathan rebuild a Girl Scout troop's garden beds.

Heath helps a homeowner install string lights over a patio; Mauro color matches a retro aqua kitchen cabinet and repaints it. Mauro goes to Home Depot to demonstration the color matching process.

Ask This Old House celebrates landscape contractor, Lee Gilliam and welcomes him to the cast; Richard helps a homeowner repair a leaking shower valve; Lee and Jenn refresh an eroding sloped yard.

Nathan heads to Tulsa, Oklahoma to build a replacement utility cover. Ross discusses low level carbon monoxide exposure. Mark helps a homeowner clean out creosote build-up in their kitchen fireplace.

Heath helps a homeowner install a generator hook up to the homes circuit board; Environmental contractor, Ron Peik demystifies asbestos; Mark fixes a faulty brick lintel repair on an 1833 home.

Mauro shares the importance of prep work. Then, he and Kevin whitewash an outdoor bench; Tom learns how double pane glass is made and then repairs a broken window.

Jenn heads to Portland, Oregon to help a couple install a rain garden; Ross shares how moisture meters can detect unseen water damage; Mark installs a railing on concrete steps.

Lee shares key tools and products in a winter weather kit; Richard shares a unique water heater; Mark shares homeowner-friendly masonry tools; Tom and Kevin build a new miter saw station.

Heath shares what factors to consider when selecting a generator and the options available; Jenn shows how to build a worm farm; Mauro heads to Oklahoma to repaint a homeowner's front door.

Nathan gives a homeowner a backyard entrance by converting a window into a backdoor. Then, the team discuss dealbreakers homeowners should consider when looking to buy a home without major renovations.

Nathan shares his love of flea markets; Mauro cleans up a garage by painting over graffiti; Ross shares the importance of radon testing; Nathan helps ready a nursery by installing closet shelving.

Richard helps a homeowner troubleshoot why her shower quickly runs out of hot water; Kevin heads to Upstate New York to meet with maker Jimmy DiResta and learns how to make a leather tote bag.

Heath shares his tips and tools homeowners can use to identify and label home circuit breakers; Tom discusses his hobby of lathe turning; Then, in Build It he turns a segmented bowl.

Mauro discusses how he sees color and some of his favorite colors; Then, he paints over an offices wood paneling; Lee discusses shrub pruning tools; Nathan travels to Portland to build a mud kitchen.

Lee cleans up a backyard by removing invasive plants; Mark discusses chimney caps and how to know if you need one; Richard installs a bidet toilet and shares what bidet options are available.

The Ask team explores how homeowners can protect their houses against wildfires. Jenn learns about firescaping, Tom fire hardens a home, and Richard learns a weeding method to lower fire spreading.

Nathan installs a shade sail for a sunny pool area; Ask This Old House spotlights the brothers of a landscaping company in the Atlanta area; Mark makes a cost-effective concrete walkway repair.

Lee troubleshoots why a backyard won't grow grass and installs a shade-tolerant sod; Ross shares what to consider before converting to heat pumps; Kevin and maker Sarah Nadarajah build a side table.

Richard praises the marvel of modern plumbing, then retrofits a radiant floor system; Nathan explains cable railing connections and maintenance; Jenn shares the updated USDA Plant Hardiness Zone Map.

Jenn and Nathan review Tulsa's stormwater management and install a rain barrel; Mark helps a homeowner divert water from her pooling patio; the team shares new additions to their tool bags.

Jenn helps a couple reimagine their yard after removed trees changed the shade pattern; Richard shares his love of teaching and gives Kevin a tour of his new HVAC distribution and education center.

Mauro brightens a dark apartment using paint concentrations; Mark and Richard discuss what naturally causes wet basements and how to mitigate it; Tom and Kevin build a bat house.

Lee revives a homeowner's garden bed; a New Hampshire painter shares how she got into the trade; Heath installs a bathroom fan in a house with bad wiring.

Ross helps a homeowner install a smart thermostat after discovering a wiring issue; Mauro shares tips on staining a deck to protect and maintain it; Mark helps a homeowner clean a bluestone patio.

Ross discusses IAQ testing; Mark restores a Victorian firebox; Jenn and Lee discuss transitioning landscapes from Spring to Summer; Tom, Kevin, and Zack Dettmore organize a tool storage cabinet.

Jenn heads to Portland to check out the International Rose Test Garden; Nathan helps a homeowner replace damaged bathroom tiles; wrapping up the season, the team review comments left by show viewers.

The Ask This Old House team talks about why they enjoy working together; Richard cuts open a failed water heater, and Jenn shares her love of educating kids about the outdoors. Then, she and Nathan build a compost bin.

Watch as Heath explains the different levels of EV chargers and their benefits. Mark shows different brick patterns, and Nathan repairs a cracked china cabinet with MDF. Then, Mauro repaints it.

In this episode, Heath installs a doorbell with new wiring, Richard explains bottle traps, and Mark replaces a homeowner's brick driveway edging with cobblestones.

Jenn plants a native woodland garden; Mauro shows how to patch cracked or chipped porcelain; Mark explains common chimney problems and then shows how to repair a chimney step by step.

Watch as Kevin learns about what goes into restoring historic wallpaper. Then, Heath explains GFCI receptacles, and Tom helps a homeowner repair and repitch their gutters.

In this episode, Mark McCullough travels to Dallas, Texas, to repair sandstone steps. Then, Ross Trethewey explains how to pick a solar plan without being scammed by the company. Finally, Nathan Gilbert helps a homeowner install an awning.

In this episode, Richard Trethewey replaces a hot water tank, and Heath Eastman shares safety tips for hanging electric holiday decorations. Later, Tom Silva explains how to repair woodpecker damage. Finally, Mauro Henrique helps a homeowner paint bathroom tile.

Kevin and Tom build a Little Free Library for an elementary school; Tom recruits his daughter, Kate, to paint it; Tom and Kevin then install the library with some help from the students.

The team share what professions they might have pursued outside of their chosen trades; Mauro Henrique discusses different types of wallpaper and demonstrates what tools to use to remove it; Heath Eastman explains how different amped receptacles can cause breaker trips; Nathan Gilbert upgrades a kitchen by helping a homeowner install kitchen cabinet hardware.

Nathan Gilbert and his dad, Bill, help a homeowner install an 1800s pocket door with reclaimed hardware; Ross Trethewey explains the technological advancements of induction cooktops compared to electric and gas stovetops; Kevin O'Connor travels to Atlanta to meet maker Char Miller-King, discuss her projects and how she teaches woodworking, and build a Shaker-style-inspired end table together.

Nathan Gilbert, Heath Eastman, and Mauro Henrique help a homeowner babyproof her house by testing for lead, testing smoke detectors, replacing old receptacles with tamper-resistant ones, and installing cabinet locks and baby gates; Jenn Nawada breaks down the basics of caring for houseplants; Richard Trethewey explains how septic systems works, how they can fail, and how to maintain them. 

In a special episode of Ask This Old House, the team partner with Rebuilding Together Boston. First, the team learn about the program and the home they will be working on. Then, the crew reach out to the Ask This Old House extended family to gather volunteers to aid with each project. With everyone's help, the crew repair a deck, construct a patio, and install landscape lighting and new plantings.

Repairing a deck; constructing a patio; installing landscape lighting and new plantings; installing a firepit.

Repairing an antique window; interior paint finishes; developing a landscape design for a small backyard; installing a stone fire pit.

Organizing a shed; the importance of yearly service checks for furnaces; installing a pea stone walkway to match an existing walkway at the front of a house.

Exploring wetlands; indoor air quality testing; repainting an exterior concrete foundation.

Upgrading a fireplace; different landscape tools and how to maintain them for spring; building a bathtub tray out of zebrawood.

Replacing a leaking gas oven; creating a pollinator garden at home; applying wireless electricity technology to electric vehicle chargers in future homes.

Insulating an attic; irrigation repairs; adding an asphalt parking spot.  

Planting a sun and shade garden; the importance of gutter downspouts; adding street visibility to a farm by remounting an original farm sign and engraving an 1800s granite post.

Team members talk about their fathers as mentors; airflow in buildings; finishing a baseball bat display case.

Kevin O'Connor explains how he became host of "This Old House"; a simple trick for drawing a perfect ellipse; moving a light fixture and patching the ceiling; the basics of finish nailers.

Applying caulk in gaps; installing crown molding around corner angles; the future of solar.

Mauro Henrique explains why he became a painter; how to test soil at home; adding a receptacle to a kitchen island.

Spacing balusters evenly; drilling holes in studs to run wire; building deck chairs; ways to deal with a damp basement.

Finishes for brick and concrete; maintaining a small backyard pond; building a three-legged Demilune table.

Tom Silva helps two homeowners build a two-level deck from start to finish.

In this episode, Richard and Ross Trethewey explain why, when, where, and how to prevent major plumbing failures.

In this special episode of Ask This Old House, Roger Cook, Jenn Nawada and Mark McCullough explain best practices for installing or repairing a walkway; Mark helps a homeowner install a new walkway using natural stone.

Jenn Nawada explains how various climates across the United States impact the design, care, and maintenance of different landscapes, which includes discussing USDA Hardiness Zones and native plant species.

In this special episode of Ask This Old House, Tom Silva and Kevin O'Connor explain everything you need to know about using, installing, maintaining and repairing a window.

In this special episode, we'll share some of the features we've added to homeowners' houses over the years and we'll break down the process of adding one of these to your own backyard.

In this special episode of Ask This Old House, Tom Silva and Mark McCullough tell you everything you need to know about fireplaces; Tom builds a custom mantel for a homeowner; Richard Trethewey discusses fireplace inserts; Mark replaces the hearth of a fireplace with granite.

Jenn Nawada discusses Christmas trees; Richard Trethewey explains what can and can't go down a garbage disposal after holiday dinners; Heath Eastman helps a homeowner safely install a variety of Christmas lights.

Nathan Gilbert helps a homeowner turn a reclaimed beam into a fireplace mantel; Richard Trethewey shows how to change a bathroom faucet; Ross Trethewey explores innovations to geothermal installations.

In this episode, Master Electrician Heath Eastman installs landscape lights in a garden and Richard Trethewey explains how siphons work. Then, Tom Silva organizes tools with pegboard, and Mark McCullough helps a homeowner redo his walkway.

Jenn demonstrates how to clean up a garden; Ross explains how air filters can catch unwanted air impurities and demonstrates how to build a DIY one; Tom and Kevin build an Adirondack chair.

Richard replaces a weird shower valve with a conventional pressure balanced one; Mauro repaints a radiator cover with lead paint on it; Tom explains how to identify and remove load-bearing walls.

Richard explains how a mini split unit is installed; Jenn explains how to identify Japanese maple trees and how to incorporate them in a landscape design; then Nathan installs a butcher block countertop.

Watch as Mark installs precast concrete steps, Mauro paints a table, and Heath installs a new lamppost.

Ross explores ways that landscaping could be done automatically; Mark goes over different walkway and driveway deicers and how they might impact masonry products; Tom and Kevin build a modern bench.

In the premiere of the 15th season, Tom replaces sash balancers on an antique window. Roger and Kevin check out the benefits of a robotic lawnmower. And Richard talks about treating water with lead.

Kevin visits Chicago to explore the dangers of home fires and ways to stay safe. Scott shows off a portable generator that doesn't run on gas. The guys ask, "What is it?" And Richard finds a rusted sink strainer in the kitchen.

Tom and Kevin use store-bought stair treads to create a bookshelf in Build It. And landscape designer Jenn Nawada transforms the look of a home's foundation by using existing plants.

Roger helps plant a home orchard using apple and pear trees. Tom shows Kevin how to choose and use a circular saw. Richard installs a new tank water heater and discusses new regulations on them.

Tom repairs a broken board on a front porch. Richard analyzes a homeowner's green-stained shower. Scott brings more power to a bedroom and is able to conceal the wiring with crown molding.

Richard learns about a way to heat and cool a house using a new room-by-room ventilation system. The guys ask, "What is it?" And Tom explains the best ways to patch a small hole in the wall.

Ross Trethewey helps build a robotic wall that could be the key to tight spaces in urban living. Tom and Kevin use reclaimed pine heart wood to create a bench with a historic theme in Build It.

Richard travels to Seattle to help a couple choose and install laundry appliances. Tom shows Kevin new table saw technology. And Scott repairs a three-way switch.

Kevin install a home elevator. Jenn Nawada investigates how to grow microgreens. Tom explains the best way to match historic moldings. And Richard diagnoses a problem with well water.

Tom heads to Chicago to transform a one-car garage into a carpentry workshop. Scott installs a wireless light switch. Richard gives a history lesson on antique bath fixtures.

Roger rips up an old, dangerous walkway to replace it with bluestone. Scott explains the best wire nuts to use for each project. Kevin gets a lesson on making mead.

Jenn shares an environmentally safe way to keep walkways safe. Tom gives a tutorial on hand saws. Richard diagnoses a hot water radiator problem. The guys ask "What is it?" Scott installs LED lights.

Jenn learns about rooftop and small space gardens. Tom explains best practices to remove stains from plaster and dry wall. Scott powers a shed by running electricity underground from the house.

Kevin heads to LA to meet up with Nick Offerman. Ross Trethewey looks at a new device to track home energy usage. And Richard shows what happens when you use the wrong soap in the dishwasher.

Tom creates wainscoting out of base cap molding. NASA astronaut Mike Foreman visits to show off a few space tools. Richard helps a homeowner to get enough hot water for his children's bath time.

Tom and Kevin use scrap to create an end grain cutting board. Scott installs surface-mounted downlights. The guys ask, "What is it?" And Roger discusses the best ways to keep mice out of your house.

Scott helps a homeowner raise and lower a light with a motorized lift. Tom shows Kevin the best uses for jigsaw and how to choose blades. Roger visits Kentucky to help a homeowner repair his lawn.

Tom installs a door knob passage set on a closet. Richard gives a history lesson about plumbing and shows off new toilet technology. Jenn uses a historic design as inspiration to revive a backyard.

Richard revisits a homeowner to repair a water heater. Tom installs a storm door with a dog in mind. And home technology expert Ross Trethewey looks at voice-activated smart devices.

Richard describes the dangers of CO2. Tom and Kevin build a home message center. The guys ask "What Is It?" Scott replaces track lighting. Jenn walks through inspiration for a landscape design.

Richard helps a homeowner improve her drinking water with a whole house filter. Jenn creates a backyard sanctuary with a patio and fire pit. Tom explains the differences between soft and hard wood.

Scott heads to Alaska to hook up a portable generator powering an entire house. Tom repairs a poorly installed piece of wood floor nosing. Richard gives an inside look at dishwasher cycles.

Richard uses cameras to locate a drain problem. Scott warms up a chilly bathroom, installing an electric convection heater. Mauro demonstrates a masking primer that leaves clean lines on a window.

Tom and Kevin create a planter box in Build It. Ross Trethewey features a tablet attachment that makes 3D scans of home interiors in Future House. Scott explains the need for surge protection.

Jenn plants a rain garden to keep runoff and waste out of marshlands. Scott brightens up a bedroom with new overhead lighting. Tom gives tips on installing cabinets accurately and consistently.

Tom learns how to create a unique keepsake box from island materials in Build It. Richard looks at a new way to store solar energy. Roger helps a family grow an organic garden.

Installing a whole house fan; working with students to liven up a school garden; water heater regulations.

Using a chainsaw; improving the electrical connection to a garage; silencing squeaky floors in a baby's room.

An electrical solution to ice dams; meteorologist Jim Cantore; snowblower maintenance; tuning up the furnace.

Turning old oak into a coffee table; driveway lawn; avoiding frozen pipes.

Replacing a front door deadbolt with a lock that uses Bluetooth; installing a weather-resistant television on a patio.

Adding a coat rack, shelving and a new door to a closet; leaky toilet; replacing a sconce at a home that was formerly a church.

Overhauling an old chimney; installing an exhaust fan in the kitchen; roof shingles.

Installing a light fixture; installing a bathtub overflow drain; insulation R-value.

Converting a front yard into a wildlife oasis; restoring a wood floor; unclogging a sink.

Growing potatoes in Idaho; Jim Cantore talks about weather stations; installing track lighting.

Repairing an antique door; growing edible herbs indoors; disappearing toilet water.

Adding festive lighting to a deck; fireplace options; tools for first-time gardeners.

Transforming a bookshelf into a secret passage; installing an outdoor house hydrant to repair a leaky spigot; tools for electrical work.

Building a home gym for a wounded U.S. Navy SEAL; repairing a faulty doorbell.

Richard shows Kevin some solutions for dealing with rust stains. Tom installs a pass through in a load-bearing wall. Roger replaces a poorly built fence gate. The guys play "What Is It" with special guest NASA Astronaut Rick Mastracchio.

Roger heads to Florida to learn about citrus greening, a disease that's killing citrus trees across the state; The guys ask What Is It?; Tom replaces an old vinyl peel-and-stick floor with ceramic tile.

Roger educates Kevin on beneficial insects. Tom resizes a front door that gets stuck on carpet every time it opens. Richard repairs an outdoor garden faucet. The guys ask "What Is It?"

The guys tackle practical solutions for drought. Kevin and Richard tour Lake Mead. Roger replaces a water-guzzling lawn. Kevin meets with Meteorologist Jim Cantore to hear cautionary tales from the front lines of the drought. Richard replaces an old-fashioned toilet.

Tom teaches a homeowner how to repair structural problems in his home. Scott Caron helps a homeowner run wiring for a new ceiling fixture and switch in a living room. The guys ask, "What is it?"

Richard samples some unique barbeque, and installs a natural gas line for a new grill. Kevin, along with Roger, Richard, and Tom ask "What Is It?" Roger shares some tips on what grows best in the shade. Tom hangs a heavy, decorative mirror on a masonry chimney.

Roger learns from a beekeeper how to set up a beehive for a homeowner. The guys ask, "What is it?" Scott Caron adds lighting to a dark kitchen without having to run new wiring.

Roger follows up with a beekeeper regarding honey harvesting. Kevin, along with Roger, Richard, and Tom ask "What Is It?" Scott Caron adds outlets to a homeowner's home.

Roger helps a homeowner build a hydroponic garden. The guys ask "What Is It?" Richard helps a homeowner install a hot and cold water outdoor faucet.

Scott Caron connects a homeowner's basement lighting system to one switch. Richard shares some tips on air conditioning maintenance. The guys ask "What Is It?" Roger shows a homeowner how to rejuvenate a crabapple tree.

Tom replaces a broken window with a safer solution. Kevin, along with Roger, Richard, and Tom ask "What Is It?" Richard shows a homeowner how to rotate a toilet.

Tom and Kevin build a watertight fire pit cover. Scott teaches Kevin about the evolution of fuses. Richard upgrades and vents a bathroom sink. The guys ask "What Is It?"

Tom helps a homeowner install interior window trim. Richard shares some first time plumbing tips with Kevin. Scott Caron wires an above ground pool safely. Kevin, along with Roger, Richard, and Tom ask "What Is It?"

Roger removes overgrown shrubs from the front yard and replaces them with an edible landscape. Richard shares tips on snaking drains and Tom helps a homeowner replace damaged pieces of vinyl siding. The guys ask, "What Is It?"

Richard installs a whole house ductless heating and cooling system. Kevin shares some tips on hearing protection and Tom helps a homeowner repair a sagging plaster ceiling. Then, Kevin, along with Roger, Richard, and Tom ask "What Is It?"

Kevin helps a homeowner transform an old backsplash. Then, the guys ask "What Is It?" Afterward, Richard helps a homeowner install a new kitchen faucet.

Tom helps a homeowner replace broken sash cords. Roger shows a homeowner how to plant bulbs. And the guys play "What Is It" with special guest Doris Kearns Goodwin.

Tom and Kevin build a basic entry shelf from poplar and plywood. Scott Caron helps a homeowner wire a basement room for outlets and lighting. Then, Kevin, along with Roger, Richard, and Tom ask "What Is It?"

Scott Caron helps a homeowner replace an undersized ceiling fan with a more appropriate one. Kevin, Tom, Richard and Roger ask "What Is It?" Roger visits a bonsai nursery to learn the art of sculpting trees.

Kevin and Roger meet with Meteorologist Jim Cantore to discuss lightning. Roger sees a lightning protection system installed. Richard installs a reverse osmosis filter for drinking water. And the guys ask, "What Is It?"

Scott Caron installs some landscape lighting. Kevin, Tom, Richard and Roger ask "What Is It?" Richard replaces a water main shutoff.

Roger helps a homeowner replace a mailbox that was damaged by a snowplow. Kevin shares some information about window anatomy. Tom helps a homeowner reuse an old door in a new opening. And the guys ask, "What Is It?"

Tom and Kevin discuss kitchen island dimensions. Richard quiets a noisy baseboard heating system. The guys ask, "What Is It?" Scott Caron helps a homeowner add light to a kitchen by install three new recessed cans.

Roger helps a homeowner plant an indoor tropical garden with plants from Jamaica. Richard, Roger, Kevin and Tom ask "What Is It?" Richard shows how to change the temperature on water heaters. Then Tom and Kevin build an American flag out of reclaimed wood.

Electrician Scott Caron helps a homeowner install an electric vehicle charger next to his house. The guys ask, "What Is It?" Then, Richard helps a homeowner install a new kitchen sink.

Richard installs a smart thermostat. Ross Trethewey shows Kevin a solar install. Kevin, along with Tom, Richard and Roger ask, "What Is It?"

Tom and Kevin build a simple table from solid fir, and Kevin works with a wood finishing expert to stain and finish it. Roger shows a homeowner how to get rid of tree stumps. And Richard discusses the state of solar energy.

Kevin helps make a home accessible for a homeowner in a wheelchair by modifying a bathroom and several different sets of stairs. Tom and Kevin rebuild a dangerous staircase for a survivor of the Boston Marathon bombing.

Kevin works with an expert to fabricate and install custom concrete countertops. Richard shows how to make watertight connections without soldering. Roger Cook demonstrates several new cordless landscape tools.

New host Kevin O'Connor arrives at the barn (a little late) and meets Roger, Richard, and Tom. Tom and Kevin discuss different types of deadbolts and demonstrate how to install one. Roger trims some hedges. Richard and Kevin fix a heating system.

Tom Silva secures a shaky newel post at the top of a stairway. The guys ask "What is it?" Richard replaces a 50-year-old water heater with a new model designed to meet strict new national safety regulations.

Roger turns a neglected slate walkway into an attractive and safe footpath. Te guys ask "What is it?" Richard helps diagnose and repair a frustrating leak in a fiberglass shower stall.

Tom shows Kevin how to repair different size holes in drywall. The guys ask "What is it?" Richard replaces a large 1920s wall-mounted toilet with a new model designed to fit an existing flange.

Roger installs a backyard drywell to handle the torrent of the rainfall from roof gutters. The guys ask "What is it?" Tom shows how to install a safety grab bar in a bathtub.

Tom shows host Kevin how to install interior window trim. Roger Cook enlists the help of landscape architect Tom Wirth to help hide a group of unsightly utility boxes. The guys ask "What is it?" Richard shows a simple fix for the broken kitchen spray hose.

Roger Cook helps plant ivy and pachysandra. Tom Silva heads off to Florida to help Miami homeowner Marc Jacobson unstick the sash on his double-hung windows.

Tom Silva installs a pre-finished wood floor. Richard replaces a bathroom sink stopper that's being held together with an old popsicle stick.

Roger Cook removes poison ivy without the use of herbicides. The guys ask "What is it?" Tom shows how to install cedar shingles and weave an outside corner..

Chimney expert Mark Schaub helps homeowner Terry Peterson repair the water heater flue in his chimney. The guys ask "What is it?" Richard installs an "anti-sweat" valve to prevent condensation on a toilet tank.

Tom Silva installs a handrail in his spilt-level stairway. The guys ask "What is it?" Then Roger shows how to transplant a large rhododendron to another area of the yard.

Roger repairs a drip irrigation system The guys ask "What is it?" Richard and tile expert Joe Ferrante help repair a leaky bathtub once and for all.

Tom quiets a squeaky hardwood floors. The guys ask "What is it?" Roger helps a homeowner build a set of timber steps on a short slope outside her home.

Roger installs a brick walkway at the front entrance to his house. The guys ask "What is it?" Tom shows Kevin different ways to cut a perfect miter in wood trim.

Tom Silva fixes stubborn sliding closet doors. The guys ask "What is it?" Richard shows Kevin the basics of electric radiant floor heat. Then Kevin and preservation specialist Sally Zimmerman use a new software package to help homeowners select historically appropriate exterior paint colors.

Richard Trethewey and a water specialist examine water quality and discuss the installation of a water softener and sediment filter. The guys ask "What is it?" Tom replaces a rotten board in her oak hardwood flooring.

Tom snakes wire for a pair of outdoor speakers. The guys ask "What is it?" Roger and Kevin head outside to plant a magnolia tree in front of the barn.

Roger shows a homeowner how to protect his ornamental shrubs from the ravages of hungry deer. Richard answers a viewer's question about PVC pipe connections. The guys ask "What is it?" Tom heads out to help the Ryan family fix a shower door.

Tom shows Kevin how to cut a pane of glass safely and accurately. Roger helps a homeowner beautify a fieldstone wall behind her home with two varieties of flowering vines. The guys ask "What is it?" Richard installs a portable air conditioning unit in an overheated attic apartment.

Richard installs a programmable thermostat. The guys ask "What is it?" Tom helps a homeowner repair a cracked plaster and lath wall in her daughter's bedroom.

Richard repairs an old steam radiator that squeals and leaks. The guys ask "What is it?" Roger helps a homeowner prepare his raised garden beds for a long, cold winter.

Tom helps installs basecap molding. Electrician Allen Gallant shows host Kevin how to purchase electrical wire by the foot. The guys ask "What is it?" Roger shows a family how to collect sap from a maple tree and turn it into maple syrup.

Richard Trethewey removes a baseboard heater to prepare for a complete remodeling of his bathroom. Richard returns to help the homeowner install radiant heat. The guys ask "What is it?" Painting expert Jim Clark helps a homeowner prepare his aluminum siding for a brand-new paint job.

Master electrician Allen Gallant installs track lighting. The guys ask "What is it?" Richard makes a house call to help homeowners quiet their noisy baseboard heaters.

Richard examines a viewer's corroded copper pipes and identifies the source of the corrosion: a rusty hot water heater. The guys ask "What is it?" Tom helps a homeowner replace the worn-out weather stripping around his drafty kitchen door.

Tom installs a new storm door. The guys ask "What is it?" Roger helps Kevin choose the right garden tools for his spring cleanup.

In the debut episode, host Steve Thomas joins Richard , Roger, and Tom in the Ask This Old House loft to give viewers a chance to ask questions and get expert advice about their homes.

Roger demonstrates different ways to mend a damaged garden hose. Richard shows plumbing tools he recommends for homeowners. Tom explains how to use a square as a guide for cross-cutting. Tom fixes a noisy garage door opener. Roger helps with a muddy lawn under swings.

Tom helps to hide an ugly back stoop. He shows the different adhesives and fasteners used, as well as more traditional types of decking. Steve and Roger demonstrate a new product that could rid backyards of mosquitoes. Richard Trethewey shows the proper technique for installing a thermostat on an old radiator.

Richard installs an air eliminator valve on a hydronic heating system. Tom shows how to remove nails without damaging trim. Steve and Roger maintain a snow blower. Painting contractor Jim Clark shows ways to clean and maintain old paintbrushes. Tom shows how to use sisal and jute rope to fill the gaps in a 160-year-old pine floor.

Tom and Steve demonstrate two types of floor sanders: a traditional drum sander and a random orbital sander. Roger and Steve dig post holes for a new fence. Richard replaces a corroded pipe on a a boiler. Tom gives Steve a lesson in proper caulking technique.

Tom repairs a cracked plaster ceiling in a condominium. Richard and Steve rebuild a toilet to prevent it from continuously filling. Roger uses a stump grinder to remove an old tree stump. Tom replaces a broken pane of glass and reglazes a window sash.

Tom repairs a sagging floor in a three-family house. The failing beam is jacked up, new concrete footings poured, and several new lally columns installed. Roger works with chainsaw expert Tim Ard to sharpen and maintain his saws.

Tom shows Steve how to cut wooden bung holes and install them in decking. Painter Jim Clark visits a viewer and shows her why the new paint in her bathroom is cracking and peeling. The guys ask "What Is It?" Tom shows how to build an attractive outdoor lattice.

Tom replaces a rotting basement window and installs a new dryer vent. Painting expert Jim Clark shows the proper technique for painting a pre-hung six-panel door. Electrician Allen Gallant installs a new power outlet in a dining room, and Roger shows Steve how to replace the string on a weed trimmer.

Richard and Steve take apart an old washing machine to determine why it's making a loud rumbling. Roger Cook uses a pressure washer to clean off a slippery walkway. The guys ask "What Is It?" Tom demonstrates different types of spirit levels, and Richard helps fix a leaky kitchen faucet.

Roger and garden tool expert Paul Schneider discuss different types of hand pruners. Tom Silva helps repair and reinstall their broken shutters. The guys ask "What Is It?" Richard shows Steve several models of instantaneous water heaters, then examine a tankless hot water system.

Tom shows different types of store-bought sawhorses and teaches Steve how to build a pair from scratch. Richard installs a new frost-proof outdoor faucet. The guys ask "What Is It?" Roger then shows Steve how to collect and compost leaves.

Painter Jim Clark shows the several different types of paint sprayers and demonstrates proper technique. Steve enlists the help of chimney expert Mark Schaub to replace a broken fireplace damper. The guys ask "What Is It?" Steve and Roger head outside to demonstrate different ways to split logs for firewood.

Richard installs a new shower faucet that will eliminate the chance of scalding. Roger and Steve head outside to test the latest robotic lawn mowers. Tom and an animal control expert help "critter-proof" a house.

Roger removes ivy. The guys ask "What Is It?" Tom replaces the window in a third-floor condominium bathroom. Tom explains the proper way to measure for a replacement window.

Painter Jim Clark shows Steve the proper way to paint the exterior of a double-hung window. Roger helps aerate and fertilize a lawn. The guys ask "What Is It?" Tom then shows Steve different ways to hang a picture on a hollow wall.

Richard installs an automatic water shutoff valve on a combination washer/dryer. The guys ask "What Is It?" Tom shows Steve the proper technique for preparing drywall joints. Richard discusses different types of plumbing torches.

Tom Silva shows several products that are designed to keep leaves and other debris out of rain gutters. The guys ask "What Is It?" Richard repairs a wobbly toilet.

Tom Silva installs insulation around sash weight pockets. The guys ask "What Is It?" Richard installs a sewage ejection pump for a new basement toilet.

Tom Silva helps remove the aluminum siding around a window and repair the damaged sill. The guys ask "What Is It?" Painting expert Jim Clark shows Steve how to use different types of paint rollers. Roger and knife sharpening expert Stan Watson sharpen kitchen knives.

Steve and Roger head outside to demonstrate different types of snow shovels and snow throwers. The guys ask "What Is It?" Tom helps repair the broken sash cords on an old window.

Richard examines a leaky shower tub faucet and repairs the fixture. The guys ask "What Is It?" Painting expert Jim Clark helps homeowners Kathleen and Kevin O'Connor remove painted wallpaper. Tom and Steve demonstrate several hot glue guns, including a new cordless model.

Tom installs crown molding. The guys ask "What Is It?" Richard helps a Chicago-area homeowner install insulation to prevent his bathroom pipes from freezing.

Richard installs a new garbage disposer. The guys ask "What Is It?" Roger and hearing protection expert Dr. Mark Stephenson test the decibel level of several power tools. They show Tom several new types of hearing protection.

Tom repairs an exterior door jamb by installing a dutchman. The guys ask "What Is It?" Richard prevents a basement from flooding by installing a leak sensor and automatic water shutoff valve on a water heater.

Richard shows Steve several different ways to clear a toilet stoppage. The guys ask "What Is It?" Tom installs a new set of folding attic stairs and Roger shows Steve how to start tomato plants from seeds.