Ask This Old House

Landscape contractor Roger Cook and arborist Matt Foti kick off the 10th season of ASK THIS OLD HOUSE by helping a homeowner transplant two trees.

Plumbing and heating expert Richard Trethewey helps a homeowner repair her faulty shower valve.

Plumbing and heating expert Richard Trethewey helps a homeowner replace a corroded fitting on his water heater.

Landscape contractor Roger Cook helps a homeowner prune an overgrown evergreen hedge.

Host Kevin O'Connor works with an insulation contractor to show the proper way to insulate a wall using fiberglass batts.

Landscape contractor Roger Cook helps a homeowner remove several overgrown shrubs in front of her house and then plants many new perennials.

Landscape contractor Roger Cook helps a homeowner repair a crack in an asphalt walkway.

Plumbing and heating expert Richard Trethewey travels to Georgia to fix a kitchen sink drain.

General contractor Tom Silva helps two homeowners build a railing for their porch.

General contractor Tom Silva travels to Philadelphia to help a homeowner put the finishing touch on a backyard pizza oven.

Host Kevin O'Connor works with an electrician in Atlanta to install a front porch light.

Plumbing and heating expert Richard Trethewey travels to Philadelphia to install a battery back-up sump pump.

General contractor Tom Silva explains to a homeowner how ice dams form and how to prevent them.

General contractor Tom Silva heads to Atlanta to help a homeowner install a solid oak front door.

Electrician Scott Caron works with a homeowner to upgrade his electrical service from 100 to 200 amps.

Host Kevin O'Connor works with painter Mauro Henrique to stain a cedar fence.

Host Kevin O'Connor and landscape contractor Roger Cook examine ways to save water when irrigating.

Landscape contractor Roger Cook heads to San Francisco to upgrade a neglected urban patio.

Plumbing and heating expert Richard Trethewey installs a recirculation pump to provide hot water quickly to a bathroom.

Host Kevin O'Connor works with a siding contractor to install new vinyl trim around a window.

Landscape contractor Roger Cook travels to Dallas to help a homeowner plant a garden using native species that are drought-tolerant.

Contractor Angelo McRae helps a homeowner tile his bathroom floor.

Alternative energy expert Ross Trethewey travels to San Francisco to learn about a new way to finance solar photovoltaic panels and then sees them installed.

General Contractor Tom Silva heads to Alexandria, Virginia, to restore the windows in a home built by George Washington.

Host Kevin O'Connor and electrician Scott Caron travel to Annapolis, Maryland, to install a manual transfer switch for a portable generator.

Landscape contractor Roger Cook and host Kevin O'Connor refinish several worn out items using spray paint.

General contractor Tom Silva kicks off the 11th season of ASK THIS OLD HOUSE by helping a couple transform stock shelving into a custom built-in.

Landscape contractor Roger Cook helps a homeowner install a bluestone patio in an urban backyard.

General contractor Tom Silva builds a custom fireplace mantel for a homeowner.

Landscape contractor Roger Cook helps a homeowner lay sod in his backyard.

Landscape contractor Roger Cook heads to Miami to help a homeowner plant several varieties of palm trees in her front yard.

In a special episode, the guys visit New York. Plumbing and heating expert Richard Trethewey tours a scale model of the entire city in Queens.

Plumbing and heating expert Richard Trethewey heads to Colorado Springs, Colorado, to install a brand new kitchen sink and faucet.

Landscape contractor Roger Cook works with a fencing contractor to install a vinyl privacy fence.

General contractor Tom Silva installs interior window trim.

Landscape contractor Roger Cook shows a homeowner how to properly mulch his garden beds.

In the workshop, general contractor Tom Silva demonstrates the proper way to use hand planes.

Host Kevin O'Connor and electrician Scott Caron head to Denver to install a ceiling fan on a cathedral ceiling.

Landscape contractor Roger Cook helps a homeowner temporarily transplant a mature rose bush while exterior work takes place.

Host Kevin O'Connor heads to Del Ray Beach, Florida, to restore terrazzo floors.

Plumbing and heating expert Richard Trethewey heads to Cheyenne, Wyoming, to help a homeowner install a toilet.

Master electrician Scott Caron helps a homeowner hang a flat panel television on the wall and conceal all the wiring.

Host Kevin O'Connor meets appliance repairman Richie Issacson to learn how to maintain kitchen appliances.

In the workshop, general contractor Tom Silva and host Kevin O'Connor build a storage bench for an entryway.

Landscape contractor Roger Cook visits a tropical botanic garden to learn how to care for orchids as houseplants.

Plumbing and heating expert Richard Trethewey visits Cortland, Illinois, to learn how corn is harvested and then to help a homeowner insulate his ductwork.

Plumbing and heating expert Richard Trethewey and host Kevin O'Connor install a ductless heat pump to heat and cool a bonus room.

General contractor Tom Silva helps a homeowner solve the mystery of her melted vinyl siding.

General contractor Tom Silva and host Kevin O'Connor demonstrate how to use all types of ladders safely.

Master electrician Scott Caron installs several types of surge protection.

Host Kevin O'Connor works with an expert to make and install custom concrete countertops.

Host Kevin O'Connor travels to Chicago to learn how subway trains are serviced.

The 12th season of ASK THIS OLD HOUSE begins with Kevin teaching the guys how to use Twitter.

Roger builds a garden bed for chili pepper plants in New Mexico.

Richard replaces a leaking kitchen faucet with a new hands-free model.

Tom visits Seattle, where he helps a homeowner install a new, pre-hung front door.

Kevin visits Santa Fe and explores the Santa Fe style of architecture.

Tommy and Kevin replace a leaky skylight. Richard repairs a noisy toilet.

Roger and a homeowner plant a maple tree. Richard heads to Indianapolis to begin work on an underground master bathroom.

In this special episode, the guys help homeowners prepare for severe weather.

Tom demonstrates many uses for a router. Richard replaces an air conditioning unit that freezes when it runs.

Roger visits New Mexico to install an irrigation system designed to work in a desert climate.

Tom heads to Seattle to install crown molding. Roger replaces a rotted fence post.

Richard visits Charlotte, North Carolina, to install a whole-house humidifier.

Roger visits Santa Fe to learn about "waffle gardening," a method of growing vegetables in an arid climate.

Tom repairs a rotted porch post. Richard visits New Orleans, Louisiana, to help a family deal with high indoor humidity.

Tom helps a homeowner fit a box spring mattress up a narrow staircase.

Richard visits a historic home in Mobile, Alabama, and installs a clawfoot tub with shower.

Roger visits Biloxi, Mississippi, where he builds a high tunnel greenhouse with a homeowner.

Richard helps a homeowner in New Hampshire quiet a squealing shower.

Roger shows Kevin how to start plants from seed. Richard replaces an outdoor hose spigot with one that will never freeze.

Roger helps a homeowner plant a low-cost, low-maintenance privacy screen.

Richard helps a homeowner replace a shower valve that shuts off mysteriously.

In this special program, the guys celebrate 300 episodes of ASK THIS OLD HOUSE by looking back at some of their best moments and revealing some behind-the-scenes secrets.

Tom and Kevin build a simple table from solid fir, and Kevin works with a wood-finishing expert to stain and finish it.

In this special episode, the guys make several important improvements.

Electrician Scott Caron replaces outdated fluorescent under-cabinet lights with new LED fixtures.

All about kitchen renovations: Tom and Kevin help a homeowner install new cabinets; Richard shows many options for countertops; and Kevin visits the Cleveland home and restaurant kitchens of Chef Michael Symon for ideas and inspiration.

The 13th season of ASK THIS OLD HOUSE begins with Richard showing Kevin some solutions for dealing with rust staining.

Roger heads to Florida to learn about citrus greening, a disease that's killing citrus trees across the state.

Roger educates Kevin on beneficial insects. Tom resizes a front door that gets stuck on carpet every time it's opened.

In this special episode, the guys tackle practical solutions for drought.

Tom teaches a homeowner how to repair some structural problems in his home.

Richard travels to Kansas City to sample some unique barbeque and help a homeowner install a natural gas line for a new grill.

Roger learns from a beekeeper how to set up a beehive for a homeowner.

Roger follows up with a beekeeper regarding honey harvesting.

Roger heads to Florida to help a homeowner build a hydroponic garden.

Electrician Scott Caron connects a homeowner's basement lighting system to one switch.

Tom replaces a broken window with a safer solution.

In the barn, Tom and Kevin build a watertight fire pit cover.

Tom travels to Cleveland to help a homeowner install interior window trim.

Roger helps a homeowner remove overgrown shrubs from the front yard and replaces them with an edible landscape.

Richard helps a homeowner install a whole house ductless heating and cooling system.

Kevin heads to Kansas City to help a homeowner transform an old backsplash.

Tom heads to West Virginia to help a homeowner repair broken sash cords.

Tom and Kevin build a basic entry shelf from poplar and plywood.

Electrician Scott Caron helps a homeowner replace an undersized ceiling fan with a more appropriate one.

Kevin and Roger meet with meteorologist Jim Cantore to discuss Jim's biggest weather fear: lightning.

Electrician Scott Caron heads to Cleveland to install some landscape lighting.

Roger helps a homeowner replace a mailbox that was damaged by a snowplow.

Tom and Kevin discuss kitchen island dimensions. Richard helps a homeowner quiet a noisy baseboard heating system.

Roger heads to Maine to help a homeowner plant an indoor tropical garden with plants from Jamaica.

Electrician Scott Caron helps a homeowner install an electric vehicle charger next to his house.

Roger teaches Kevin about lengths to consider when mowing the lawn.

Watch Tom keep things cool on the West Coast with a whole house fan installation.

From chaps to eye protection, watch Roger and Kevin go over the dos and dont's of chainsaw use.

A driveway pothole is more than meets the eye for Roger.

Watch Richard and Kevin investigate mechanical rooms on their trip to Germany and explain why the country is a world leader in energy efficiency.

It's trash day and Jenn is ready to recycle. See how homeowners can use organic garbage to create soil.

The sinking feeling of regret. Watch Richard rescue an Atlanta homeowner by replacing a trendy mistake in the bathroom.

Butterflies take flight. Watch Roger track the path of Monarchs and set up a garden just for them in Fort Worth.

It's a recipe thousands of years old. Watch Kevin learn about ales and lagers from Bridget Lancaster of America's Test Kitchen.

Oh baby!

See a special episode on all things winter. See Scott offer an electrical solution to ice dams.

Reclaimed wood and a little inspiration. Watch Tom and Kevin turn some old oak into a popular coffee table.

Replacing a pedestal sink is a tall task, but Richard is up for the challenge in Delaware.

On a trip to Minneapolis, Tom takes the right steps to install a new attic staircase.

Get smart. See Kevin replace a front door deadbolt with a smart lock controlled by Bluetooth.

Watch Tom complete a closet by adding a coat rack, shelving and a new door.

Food expert Chris Kimball discusses maple syrup and takes a few for a taste test.

Ready for a chimney overhaul. Watch Kevin reignite an old flame in Texas.

See Scott visit a 19th-century home in Saint Paul to install a light fixture that mirrors its history.

Birds, bees and butterflies. Watch Jenn Nawada convert a ho-hum front yard into a wildlife oasis.

From soil to supper, see Roger learn the ways of a potato farm in Idaho.

No more dirty laundry. See Richard troubleshoot problematic plumbing to install a washer and dryer.

Too short, crooked and upside down. Watch Tom use his expertise and artistry to repair an antique door.

Looking for illumination in Texas, watch Scott jazz up a deck with festive lighting.

Actor Nick Offerman brings his woodworking expertise to the barn and "What Is It?" See Tom take a chapter from Richard's playbook by creating a steel pipe shelf in "Build It.

Tom's working his magic in Salem; see him transform a bookshelf into a secret passage.

Tom and Kevin head to Montana to build a home gym for a wounded Navy Seal.

Watch Tom pull off a balancing act to repair an old window.

Kevin heads to Chicago to learn about fire dangers in homes and how to prevent them.

Watch Tom and Kevin create a bookshelf using stair treads and minimal tools in "Build It.

Unsafe and ready to break - Tom skillfully replaces a cracked deck board on a front porch.

Unsafe and ready to break? Tom skillfully replaces a cracked deck board on a front porch.

Rocket scientist turned HVAC innovator-watch Richard meet the man behind a new technology that could revolutionize the way we heat and cool homes.

Bedroom, home office and master closet all in one!

High tech and using less water than ever before - Richard's in Seattle to help a couple pick the most efficient washer and dryer.

Watch Kevin work with an accessibility contractor to assemble a home elevator for a teen injured during the war in Afghanistan.

Chicago's all about the "L" train, but Tom's focused on a one-car garage.

Out with the flagstone and in with the bluestone - Roger changes a dilapidated entrance into a welcoming walkway.

Richard to the rescue - see him diagnose a malfunctioning hot water radiator and give a lesson on diverter tees.

Landscape designer Jenn Nawada climbs the ladder to learn about rooftop and small-space gardening.

Kevin heads to Los Angeles to visit comedian Nick Offerman and tour his woodworking shop.

An indirect route to solve a hot water problem-Richard helps a father of two make bath time fun again.

Nothing beats leftovers-Tom and Kevin use scrap heart pine to make a cutting board in "Build It.

Bluegrass and beyond - Roger travels to Kentucky for tips on lawn care.

Inspiration from the past - landscape designer Jenn Nawada uses a historic plan to revive a homeowner's back yard.

See Tom make a house more energy efficient while adding a special treat for the homeowner's dog.

Tom and Kevin are ready to bring the family together with a home message center in Build It.

Not so tasty - see Richard help a homeowner improve her drinking water with a whole house filter.

Visiting the show's 49th state!

A clogged drain has Richard fishing cameras through pipes to locate the problem.

See Tom and Kevin use western red cedar to create a planter box in Build It.

Protecting the environment: Watch Jenn plant a rain garden to keep runoff and waste out of marshlands.

That makes 50!

Richard travels to the Grand Canyon. Then, he helps a homeowner with hard water by installing a new type of water softener; in Future House, Ross demonstrates a home organization app; in Build It, Tom builds a shadow box using wood from an old door.

Tom teaches a young fan how to build a tool box; Scott installs smart smoke and carbon monoxide detectors in Charlotte; Richard diagnoses a leaking temperature and pressure relief valve and installs an expansion tank to fix it.

A homeowner has never tiled before, so Tom teaches her how using a simple technique; Richard demonstrates a wireless leak detector that prevents floods; Jenn installs a water feature that collects and reuses rainwater.

Roger helps a homeowner reseed a dead section of lawn and blend it in with the rest of the yard; Richard shows the basics of changing a toilet; in Future House, Ross sees an off-grid home in South Carolina that's testing commercial HVAC equipment.

Richard replaces a small radiator with one that's the correct size; Roger demonstrates the importance of sunscreen on the jobsite; in Milwaukee, mason Mark McCullough makes his first house call to teach a homeowner how to repoint brick.

Richard breaks down the differences between water filters; Roger removes a tree that's leaning dangerously toward a house; Tom demonstrates different ways to locate studs in a wall; Scott installs a smart garage door opener.

It's the holiday season at the AskTOH barn!

Tom fixes a window that was not hung properly and is now letting air in; Mark demonstrates how to clean brick with acid; Ross finds a solar panel that can generate drinking water from thin air.

Roger teaches his apprentice how to not only repair a damaged walkway, but also how to identify what caused the damage so it can be prevented in the future; Tom patches a chipped wood floor using a Dutchman and hand tools.

Mark tests out different tools that collect silica dust more efficiently; Richard shims a wobbly toilet; Kevin heads to the Catskills to build a wooden slice table with Jimmy Diresta, a maker who's famous online for his how-to videos.

Richard heads to Milwaukee to install an instantaneous water heater; Tom demonstrates some techniques for cutting straight edges with a circular saw; Mark rebuilds a retaining wall that was stacked with the wrong material.

Richard shows Kevin the proper way to ventilate a sink; in Nashville, Tom converts a regular door into a Dutch door; Jenn updates a landscape by moving around, dividing, and pruning the current plants in the yard.

Roger installs a downspout alternative; painter Mauro Henrique explains the differences between various types of paintbrushes; Richard installs a vanity for homeowners who gave up on it 7 years ago; Tom shows closet storage options.

Roger tends to a lawn that was seeded in the summer and is not doing well; Richard goes over low-budget kitchen upgrades; Tom travels to a futuristic workshop in San Francisco to build a stool using computer-based tools.

Richard diagnoses and repairs a water system with air in it; in Open House, Tom analyzes a staircase that is not to code; Mauro makes his first house call to teach a homeowner the basics of painting a room.

In this special episode of AskTOH, the guys head to Texas in the aftermath of Hurricane Harvey to profile nonprofits working to tear down, clean out, and rebuild homes that were destroyed during the storm.

Mark installs a metal railing using anchoring cement; in Open House, Richard weighs the pros and cons of steam heat; Tom demonstrates the correct way to replace a cracked kitchen floor tile.

Richard demonstrates a solution for replacing a water main shutoff; Jenn travels to Tennessee to build a planter out of an animal feeding trough; Mark waterproofs brick; Kevin heads back to Jimmy DiResta's shop to build a sign.

Richard discusses the possible causes and solutions for a frozen air conditioner; Tom fixes an end cap on a stair railing that keeps coming loose; Ross travels to Napa to tour a house that's testing a variety of interconnected smart home devices.

In Nashville, Richard repairs and replaces a leaking shower valve; Roger explains safety features built into all chainsaws; Kevin makes a bucket stool with Ben Uyeda, a maker best known for his design-based online videos.

Mauro teaches a homeowner how to paint a metal door; Mark explains how to match mortar for repointing jobs; Tom teaches apprentice Austin how to make a variety of different wood joints by building simple utility boxes.

Tom installs an alternative to a gutter when a traditional one does not work; Ross and Richard update Kevin on a Future House technology; Jenn heads to Phoenix to re-create the desert in a homeowner's front yard.

Mauro travels to Sacramento to show a homeowner the safe way to strip paint; Tom explains basic chiseling techniques; Richard helps a special homeowner hook up a refrigerator with an icemaker.

Mark teaches apprentice Krysten how to reface a granite fireplace; Jenn gives some tips on starting an organic garden; Richard helps a homeowner replace her kitchen faucet when she realizes her shutoff valve is broken.

Tom uses multiple techniques to make a drafty door weathertight; Mauro demonstrates the most effective way to clean a paintbrush; Roger and Jenn test out a variety of battery operated lawn tools.

In Austin, Ross visits a community that plans to have all net zero energy housing; Richard demonstrates the uses of less common wrenches; Tom and Kevin build a console table using a maple slab with a live edge on it.

Mark explains how to make concrete; Tom replaces a broken pane in a basement window; in Future Hosue, Ross travels to NASA Johnson Space Center to learn about the technology they use on the International Space Station to keep the astronauts alive.

Mark replaces a chipped brick in a fireplace surround and then Mauro updates it with a whitewashed look; Richard shares some advice on maintaining water heaters; Tom demonstrates the importance of a properly installed drip edge.

Tom travels to Colorado to help a couple build a DIY swing set for their young son; Nathan demonstrates how to build saw horses using leftover materials from the job site; in Future House, Ross learns about automated home construction.

Mark replaces a concrete walkway with brick pavers; Richard explains how gas piping is installed in a home; Kevin returns to Upstate New York to build a farmhouse table with maker Jimmy DiResta.

Kevin travels to Portland, Oregon to learn how to protect homes from earthquakes; Mark stains concrete; in Open House, Tom explains why and how to change the locks in a new home; Richard travels to Cleveland to reroute a lengthy dryer vent.

Nathan upgrades a kitchen to have soft close cabinets; Richard and Kevin discuss how gas regulators work and how their malfunctions caused gas explosions in Massachusetts; Jenn cleans up an overgrown garden and redesigns it as a secret garden.

Tom travels to Pittsburgh to replace a bi-fold closet door with one that is more appropriate for the house; Jenn discusses alternatives to flower bouquets that make great gifts; Mauro paints a bathroom using a mold resistant paint.

Jenn installs a vertical garden to maximize space for a homeowner; Tom explains the uses for different drill bits; Richard travels to a plumbing facility in New Jersey to learn about advances in toilet engineering that will help save water.

Mark travels to San Diego to repair a crack in a concrete retaining wall with a stucco finish; Tom explains how air compressors work; Richard helps an expecting couple select and install a gas dryer.

Mauro helps a homeowner clean up and repaint a rusty metal railing; Richard discusses some innovations that can make clearing a clogged sink easier; Tom and Kevin build a wine rack out of a reclaimed beam.

Roger and Jenn share tips for killing weeds without hurting the lawn; Mark restores a historic fireplace that is built with custom bricks; Richard and Ross discuss improvements to thermostats; Tom adds structure to a porch to safely hang a swing.

Ross tests a smart stud finder; Nathan travels to Oregon to repair a wood floor that was burned from a hot iron; Tom shares the best techniques to use a table saw safely; Jenn replaces and improves foundation plantings that were crushed by snow.

Richard travels to Orlando to diagnose and repair an HVAC system that's creating way too much humidity; Mark demonstrates the best way to build a fire to prevent smoke from filling up the room; Mauro teaches a homeowner how to re-stain a deck.

Tom demonstrates how to sharpen a knife; Mauro teaches a homeowner how to re-stain her deck; Mark demonstrates the best way to build a fire to prevent smoke from filling up the room; Ross learns about innovations to automatic water shutoff valves.

Jenn helps a homeowner add curb appeal to his house using Victorian plants to match its design; the team shares more home inspection nightmares; Mauro demonstrates how to accurately match paint color; Tom and Kevin hand carve wooden serving utensils.

Nathan travels to Birmingham, Alabama to install a sliding barn door in an open-concept loft apartment; Tom compares the qualities of different types of roofing materials; Ross explains the culprit behind damaged solar panels and how to prevent future damage; Mark installs a drywell for a homeowner with drainage issues in his backyard.

Mauro paints a baby's nursery using zero VOC paint; Richard tests out a new dryer that uses a heat pump to dry the clothes; Tom and Kevin build a record player stand out of oak plywood.

Jenn teaches Kevin how to plant a small herb garden with a cocktail theme; a homeowner's radiator sprung away from the pipe when he tried to replace the valve, so Richard heads to his house to help him reconnect it; Mark replaces a homeowner's sloppy fireplace surround with a clean, thin brick veneer.

Tom explains the uses and purposes of different types of screws; Richard travels to Park City, Utah to install a whole house ductless humidifier; Ross and Richard discuss changes to electric bill payment structures; Jenn installs a front entry planter for a homeowner that will last through the winter.

Tom repairs an old dining room built-in with hand tools and a bar of soap; the team shares more home inspection nightmares; electrician Heath Eastman makes his first house call to install a chandelier in a homeowner's dining room.

Tom checks out a women's only DIY class on building a footstool and discusses some of the unique challenges faced by women learning DIY skills; Jenn helps a homeowner select, place, and install plants for her terraced garden; the team discusses the ways homeowners and contractors should communicate to set appropriate expectations for home improvement projects.

Tom travels to Utah to help a homeowner replace his traditional stair railing with more modern cable railing; Richard explains why standard PVC should not be used to vent gas appliances and what should be used instead; Nathan upgrades a standard, flat panel hollow core door to look more modern; Mauro helps a homeowner properly clean and paint her vinyl shutters.

Mark explains the history and function of beehive ovens and then restores one; Richard explains failure points in toilet tanks and how to repair them; maker Jimmy DiResta invites Tom to his shop for a welding lesson and to build a metal coat rack.

Kevin builds a hexagon planter with maker Jenn Largesse; Jenn Nawada travels to Brooklyn to revive a stoop that has been taken over by weeds; the team shares more Home Inspection Nightmares; Heath installs an electric fireplace insert.

Nathan demonstrates a sanding kit with different profiles; Heath clarifies and installs the temperature rating system for ceiling lights; Mark explains the purposes and uses for different types of trowels; Tom and Kevin build a tool storage shelf.

In this special episode of Ask This Old House, Tom walks two homeowners through the entire process for building a two-level deck, starting with pulling permits and getting a land survey all the way through to installing the deck boards and railings.

Richard explains how, where, and why plumbing systems fail; Richard gives a deep dive on when and how plumbing pipes and connections can be repaired or replaced; Ross explains and demonstrates how to prevent plumbing failures with new technology.

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

In this special episode of Ask This Old House, Jenn 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.

Tom and Kevin explain everything you need to know about using, installing, maintaining and repairing a window.

Jenn and Roger install a variety of different water features to accentuate landscapes; Roger installs an alternative to a downspout; Jenn installs a waterfall feature in a backyard that reuses water.

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

Roger discusses different Christmas tree species; Richard explains what can and can't go down a garbage disposal after big holiday dinners; Heath helps a homeowner safely install a variety of Christmas lights.

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

Heath installs landscape lights in a garden; Richard explains how siphons work and how they are used to make a toilet work; Tom organizes tools with pegboard; Mark 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; Nathan installs a butcher block countertop.

Mark learns how precast concrete steps are made and then replaces a homeowner's steps; Mauro explains how to refinish an old table; Heath helps a homeowner replace his front lamppost with a new one.

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.

Tom travels to Nashville to turn an original, exterior door into a Dutch door; Richard explains how to install a garbage disposal; Mark and Jenn reface a concrete wall with thin stone veneer.

Tom explains how different sanders work and how to sand well; Mauro shows how to use a power washer to clean siding; the team share more home inspection nightmares; Heath installs deck railing lights.

Richard moves baseboard heat from one side of a room to another; Jenn explains the basics of selecting different species of arborvitae; Tom and Kevin build an outdoor bench that doubles as a cooler.

Jenn travels to Orlando to upgrade a homeowner's irrigation system with a smart one; Heath explains a few different ways to troubleshoot flickering lights; Mark repoints a set of brick front steps.

Richard explains a variety of failure points in a hose spigot; Mauro demonstrates the how to paint vinyl siding; Jenn explains how and why to maintain pruners; Nathan builds a custom fence gate.

Jenn explains how to care for echinaceas; Mark explains how to cut stone with a saw and chisel; Richard replaces a kitchen sink and faucet; Tom helps a homeowner wrap up a few kitchen projects.

Heath performs an electrical inspection; the team share more Home Inspection Nightmares; Tom helps two homeowners meticulously restore their antique front door using a variety of techniques.

Richard and Nathan retrofit a new dishwasher into an old kitchen; Mauro paints wood paneling; Tom and Kevin turn a French rolling pin.

Richard installs a shutoff valve for washing machine supply hoses; Ross and Heath discuss the progression of EV chargers; Jenn discusses ornamental grasses; Nathan helps a homeowner repair her deck.

Kevin and Tom travel to Montana to set up an accessible home gym for a Navy SEAL veteran; Mauro shares how to select the right paint color; Mark updates a fireplace with a stacked stone veneer.

Nathan builds a display case to store his grandfather's U.

Richard discusses pipe soldering; Heath explains what two-prong receptacles are, why they're no longer to code, and how to replace them; Nathan and Mauro build, install, and paint deck stair railings.

Jenn creates a landscape that can withstand heavy pedestrian traffic; Richard explains the options available for water heaters; Tom and Kevin build a cutting board out of walnut, cherry, and maple.

Jenn discusses creative options for ground cover plants; Tom demonstrates different techniques for patching wall holes; Mark demonstrates how to patch brick holes; Nathan installs a new threshold.

Mauro demonstrates how to remove dried paint from a paintbrush; Tom shares the best techniques for connecting and installing tongue and groove flooring; Jenn and Nathan build a DIY ice rink.

Ross discusses the pros and cons of smart doorbells; Mauro demonstrates techniques for painting wood paneling; Heath shares some of his most-used tools and helps a homeowner install recessed lights.

Mark explains how bricks are made and how many different varieties there are; Richard explains how solderless connections work; Tom assess and reshingles a shed roof with asphalt shingles.

Jenn shares her list of must have gardening tools and how to put a garden to bed before winter; Mauro demonstrates how to paint a kitchen cabinet; Nathan installs exterior front door trim.

The entire team comes together to help Mark rebuild the chicken barn he lost to a fire.

In Tool Lab, tool expert Chris Ermides demonstrates how tables saw blades work; Heath explains why and how to use a voltage tester; Mark helps a homeowner extend her existing patio.

Wash your hands, mask up, and stay 6 apart with Erik as he learns about and navigates a new travel world emerging from the COVID-19 pandemic.

Jenn explains how to identify and care for holly plants; Richard explains how dishwashers work and how to troubleshoot them when they don't drain properly; Tom and Kevin turn Christmas ornaments.

In Tool Lab, Nathan explains what different table saw blade types are used for; Ross extends WiFi service in a house; Richard replaces a faulty tub drain; the team shares their New Years' Resolutions.

Mark shares the story of how he became a mason; Tom explains why wood rots on houses, how to prevent it, and how to repair it if it occurs; Ross explores heat pump technology.

Heath explains why finish electrical work is his favorite stage of the job; Mauro demonstrates how to repair a crack in plaster; Mark raises a drywell in a driveway that is sinking below grade.

The entire cast reflects on the 20th anniversary of ASK THIS OLD HOUSE.

Jenn shares the story of how she became a landscape designer; Richard and Ross explain cost-effective ways to save money on your heating bill this winter; Nathan helps a homeowner replace a vinyl kitchen floor.

Jenn and Mark show how to make a stone water fountain for your garden; In Tool Lab, Nathan breaks down Miter Saw blades; The team comes together to discuss the challenges they've faced dealing with ongoing supply chain issues.

Richard shares how he became a plumber and what he loves about his trade; Ross talks about smart thermostats and their features; Heath explains how to understand switch legs; Tom replaces an old, rotted porch column base.

Jenn visits a nursery to learn how shrubs are planted and harvested; Ross and Nathan show cost-effective ways to air-seal your windows this winter; Tom demonstrates how to build a serving tray using a box joint jig.

Nathan gives a tour of his highly organized truck; Richard shows different kinds of bidets and their functions; Mauro explains how to use spray paint for small home projects; Mark replaces an old, patched driveway with a new concrete one.

Jenn Nawada explains how you can compost at home; Jenn Largesse and her landscape contractor install a concrete block retaining wall in Jenn's backyard; Tom constructs custom built-in drawers, cubbies and shelves for a front hall closet.

Heath breaks down the basic voltages of cordless tools; Richard gives an overview on how to handle simple clogs in a bathroom sink, kitchen sink and toilet; Mark repairs a fireplace and replaces its cover.

Tom shares how he became a general contractor and what he loves about his trade; Heath and Ross explain what smart electric panels are and how they work; Jenn and Nathan build and fill new window flower boxes.

Nathan demonstrates different ways to fix scratches on wood furniture; Jenn Largesse oversees the installation of a shipping container pool in her backyard; Tom shows how to fix and resecure a sagging fence gate.

Nathan shares how he became a carpenter and what he loves about his trade; Heath talks all about different LED lightbulbs; Richard fixes a wobbly toilet and repairs a sticky faucet handle.

Jenn Nawada suggests houseplants for areas of shade, partial shade and sun.

Nathan shows how to mount a flat screen TV on a wall.

Ross shares why he became an engineer; Tom talks about different types of hammers; Richard shows how to control common plumbing emergencies; Nathan removes and replaces a garage door.

Jenn shows off different varieties of hydrangeas; Heath explains types of smoke and carbon monoxide detectors and their functions; Mauro refinishes deck railings and posts.

Richard shows how to replace a toilet seat; Jenn Largesse builds a pergola for her backyard; Nathan repairs a century-old full mortise lockset.

Jenn talks about different types of succulents; Richard installs a reverse osmosis under-sink water filter; Tom builds a classic milk stool.

Heath shows how to use common electrical tools; Ross conducts an in-depth home energy assessment; Mauro shares one of his favorite painting tips.

Ask This Old House team members talk about their fathers as mentors; Richard and Ross explain airflow in buildings; Tom finishes a baseball bat display case.

Kevin shares how he became the host of This Old House; Tom shows a simple trick for drawing a perfect ellipse; Heath moves a light fixture and Mauro patches the ceiling; Nathan explains the basics of finish nailers.

Heath shares why he became an electrician and what he loves about his trade; Mauro shows a trick for applying caulk in gaps; Tom shows how to install crown molding around corner angles; Ross explains the future of solar at MIT.

Mauro shares why he became a painter and what he loves about his job; Jenn shows how to test soil at home; Heath adds a receptacle to a kitchen island.

Tom shares a trick to space balusters evenly; Heath shows how to drill holes in studs to run wire; Jenn Largesse builds DIY deck chairs; Richard explains ways to deal with a damp basement.

Mark explains finishes for brick and concrete; Jenn shows how to maintain a small backyard pond; Tom builds a three-legged Demilune table.

Nathan explains the anatomy of track saws; Mark repoints an outdoor pizza oven; The Ask This Old House team comes together for a 20th Anniversary "What Is It?"