Ask This Old House Episode Rating Graph

Host Kevin O'Connor heads to Del Ray Beach, Florida to restore Terrazzo floors. Then, Kevin, along with landscape contractor Roger Cook, plumbing and heating expert Richard Trethewey, and general contractor Tom Silva ask "What Is It?" Afterward, Tom helps a homeowner repair a cracked floor joist.

Building a custom fireplace mantle; garden edging; repairing a leaking kitchen faucet.

The This Old House crew brings in an electrician to Install a manual transfer switch, and Rich helps a homeowner fix a clogged sewer line.

Tom shows how to restore old windows while Rich helps a homeowner install a kitchen sink water filter.

Instalilng solar photovoltaic panels; framing walls for a basement-remodeling project.

A contractor shares tips for tiling a bathroom floor while Tom helps a homeowner weatherstrip her front door.

Roger shows a homeowner how to plant a garden using native species, and Tom replaces a door with a window.

In the Ask This Old House loft, Roger and garden tool expert Paul Schneider discuss different types of hand pruners. Tom helps two homeowners repair and reinstall their broken shutters. Back in the loft, Steve, Tom, Roger and Richard examine two unfamiliar objects and try to guess how they're used. Richard shows Steve several models of instantaneous water heaters, then visit a local homeowner to examine his tankless hot water system. More Info & Resources

Landscaping contractor Roger Cook helps a homeowner conserve water by installing an innovative rainwater collection system. Then Roger, along with host Kevin O'Connor, plumbing and heating expert Richard Trethewey, and general contractor Tom Silva ask, "What is it?" Then Tom helps a pair of homeowners connect two rooms in their home by removing an interior load-bearing wall.

Richard replaces a shower valve with a conventional pressure balanced one, Nathan demonstrates how to refinish stair treads, and Tom removes moss from a roof in the latest episode of Ask This Old House.

Installing a thermostat that interfaces with a smartphone to save energy; installing a photovoltaic solar array on a barn.

Installing an electric vehicle charger; installing a new kitchen sink.

Replacing a mailbox damaged by a snowplow; window anatomy; reusing an old door in a new opening.

How to repair broken sash cords; and plant bulbs. Also: historian Doris Kearns Goodwin guests in the "What Is It?" segment.

Building a simple table from solid fir; removing tree stumps; solar energy.

Master electrician Scott Caron helps a homeowner hang a flat-panel television on the wall and conceal all the wiring. Back in the workshop, Scott shows Kevin examples of many different types of electrical outlets. Roger heads to Miami to help a homeowner control the insect pests in her yard without the use of pesticides.

Laying sod in the backyard; finding measurements without doing math; wireless thermostat controls the heating system.

Planting an indoor garden; the basics of using a hole saw; replacing a common terra cotta hearth with slate tile.

Scott Caron offers an electrical solution to ice dams. Kevin talks climate change with Weather Channel meteorologist Jim Cantore. Roger shares a few tips on snowblower maintenance. And Richard goes over furnace upkeep.

Kevin visits Delaware to help a new mother childproof her home. Richard uses his skill to fix an under counter mount sink. And Scott gives Kevin a tutorial on the latest voltage testers.

Installing an irrigation system designed for a desert climate; new style of heat-pump water heater; reusing an old garden hose reel.

In the loft, Richard shows Steve several different ways to clear a toilet stoppage. Then Richard, Steve, Tom and Roger examine an unfamiliar object and try to guess how it's used. Tom and homeowner Tom Flannery install a new set of folding attic stairs and Roger shows Steve how to start tomato plants from seeds. More Info & Resources

Rich works on installing a recirculation pump while the crew works with a homeowner to line a fireplace chimney.

Landscaping contractor Roger Cook shows host Kevin O'Connor a few ways to deal with rainwater from gutters and downspouts. Then, up in the workshop, plumbing and heating expert Richard Trethewey talks "All About" pliers. Then Roger, Kevin, Richard, and general contractor Tom Silva ask, "What is it?" Afterward, Tom and Kevin insulate an attic floor using fiberglass batts and blown-in insulation.

General contractor Tom Silva helps two homeowners complete the construction of their new backyard deck. Then, back in the workshop, Tom shows host Kevin O'Connor a few other types of hidden deck-fastening systems.

Landscaping contractor Roger Cook shows host Kevin O'Connor a few helpful techniques for mowing a lawn. Then, general contractor Tom Silva helps two homeowners begin building the backyard deck of their dreams.

Plumbing and heating expert Richard Trethewey helps a homeowner install a second sink into an existing bathroom vanity. Next, landscaping contractor Roger Cook shares a viewer tip that makes yard clean-up a little easier. Then, general contractor Tom Silva helps a homeowner repair a large crack in his concrete block foundation.

Landscaping contractor Roger Cook and plant expert Carrie Kelly discuss different types of groundcover. Then, plumbing and heating expert Richard Trethewey helps a homeowner warm up her cold living room by installing new hydronic baseboard heaters. Afterward, back at the workshop, general contractor Tom Silva shows host Kevin O'Connor a new product that makes it easier to mark and cut openings for electrical outlets in wallboard.

This special episode is dedicated to making the most out of your existing kitchen cabinets. First, host Kevin O'Connor and expert painter Rich O'Neil show a homeowner how to prepare and paint her oak kitchen cabinets. Next, general contractor Tom Silva visits a pair of Connecticut homeowners in need of some organization solutions for their cramped, cluttered cabinets.

Plumbing & heating expert Richard Trethewey heads to Indianapolis to help a pair of homeowners install a whole-house water filter. Then Richard, along with general contractor Tom Silva, landscaping contractor Roger Cook, and host Kevin O'Connor ask, "What is it?" Then Tom helps a homeowner repair a hole in a rubber roof and Richard shares a viewer tip for cutting PVC pipe without a saw.

Honoring landscape contractor and mentor Roger Cook; colleagues share their favorite memories and reflect on his impact.

Installing a bathroom recessed cabinet; replacing a chimney that has been causing water damage to an indoor charcoal grill.

Nathan heads to Texas to help a mom of six organize her family shed; Richard emphasizes the importance of a yearly service call for furnaces; Mark installs a pea stone walkway to match an existing walkway in front of the homeowner's house.

The Ask This Old House team travels to and appreciates different national parks and makes a few house calls.

Kevin uses a smartphone app to help a homeowner turn his front door deadbolt into an electronic entrance. Scott installs a television outdoors for a little open-air entertainment. And it's a white sphere with blue holes, but "What is it?

Richard travels to Atlanta to replace a vessel sink with a self-rimming sink. Scott installs a motion sensor security light in a driveway. And the guys ask "What is it?"

A driveway pothole is repaired; and an old railroad lantern is given new life. Also: building a Shaker-styled nightstand.

Kitchen island dimensions; quieting a noisy baseboard heating system; adding light to a kitchen.

Building a basic entry shelf from poplar and plywood; wiring a basement room for outlets and lighting.

A broken window is replaced with a safer option; and a toilet is rotated.

Installing new cabinets; countertop options; the home and restaurant kitchens of chef Michael Symon.

How to start plants from seed. How to prevent an outdoor hose spigot from freezing. How to build a movable kitchen island.

Tommy replaces a leaky skylight. Richard quiets a noisy toilet.

Planting several varieties of palm trees in a front yard; light bulbs; Replacing an old heating system and hot water heater with a more efficient single appliance.

Roger helps a homeowner upgrade a neglected urban patio while Tom helps hang a heavy mirror.

Rich shows a home owner how to reuse water from a washing machine. The crew talks about maintaining small gasoline engines.

Tommy helps a homeowner install a solid oak front door and the crew gives tips on driving rebar into the ground.

The crew shows a homeowner how to prevent ice dams and helps another apply closed-cell spray foam Insulation in their attic.

Landscaping contractor Roger Cook and host Kevin O'Connor head outside to do some yard clean-up using rakes, blowers and lawn vacuums. Then, up in the loft, plumbing and heating expert Richard Trethewey shows Kevin how HVAC thermostat technology has evolved over the years. Next, general contractor Tom Silva and Kevin install carpet tiles over a concrete basement floor.

Up in the workshop, general contractor Tom Silva and host Kevin O'Connor build a tool storage cabinet, perfect for any basement or garage. Then, Tom and Kevin, along with landscaping contractor Roger Cook and plumbing and heating expert Richard Trethewey ask, "What is it?" Then Kevin works with a damage prevention specialist to protect a house from catastrophic floods.

Host Kevin O'Connor and general contractor Tom Silva demonstrate how to select and install antique and reproduction door hardware. Then, Kevin and Tom, along with plumbing and heating expert Richard Trethewey and landscaping contractor Roger Cook ask, "What is it?" Afterward, Richard shows a homeowner how a geothermal home heating and cooling system works.

Plumbing and heating expert Richard Trethewey helps a pair of homeowners reduce their utility bills by installing a new forced-air furnace and air conditioning system. Then, general contractor Tom Silva helps a homeowner repair damage to her oak flooring that was caused by a leaky radiator.

General contractor Tom Silva helps an old friend repair the loose carpeting on his staircase. Then, landscaping contractor Roger Cook shows host Kevin O'Connor several different types of shovels and other tools for digging. Afterward, Kevin heads to Pasadena, California where he and a local electrician help a homeowner install recessed lights in a kitchen ceiling.

Tom Silva helps a homeowner repair a wobbly newel post at the bottom of a staircase. In the Ask This Old House loft, Richard Trethewey shows Kevin O'Connor various methods for cutting rigid pipes and flexible tubing. Roger Cook visits an arboretum to learn how to reproduce plant specimens from cuttings and by grafting.

Plumbing and heating expert Richard Trethewey and general contractor Tom Silva head to Detroit to help a homeowner remodel her kitchen with new appliances, countertops, a backsplash, and even the kitchen sink! Then, landscaping contractor Roger Cook shares a viewer tip with host Kevin O'Connor on how to improve drainage in the bottom of a flower pot.

Plumbing and heating expert Richard Trethewey heads to Tampa, Florida to help a homeowner cool off his garage workshop with a ductless air conditioning system. Then Richard, along with landscaping contractor Roger Cook, host Kevin O'Connor, and general contractor Tom Silva ask, "What is it?" Afterward, Tom helps a homeowner eliminate a mysterious leak in her living room ceiling.

General contractor Tom Silva helps a homeowner dress up an old fireplace by installing a new mantle and marble hearth. Then Tom, along with host Kevin O'C'onnor, landscaping contractor Roger Cook and plumbing and heating expert Richard Trethewey ask, "What is it?" Afterward, Richard shows Kevin a few ways to improve the appearance of old baseboard heaters.

Plumbing and heating expert Richard Trethewey heads to Tampa, Florida to help two homeowners repair their broken water softener. Then Richard, along with host Kevin O'Connor, landscaping contractor Roger Cook, and general contractor Tom Silva ask, "What is it?" Next, Roger helps a homeowner repair and prevent deer damage to one of his evergreen trees. Then, up in the loft, Tom shares a viewer tip on how to reduce airborne dust while sanding.

Landscaping contractor Roger Cook helps a pair of homeowners improve the appearance of an unsightly concrete retaining wall with wooden lattice and climbing vines. Then Roger, along with plumbing and heating expert Richard Trethewey, general contractor Tom Silva, and host Kevin O'Connor ask, "What is it?" Next, up in the loft, Tom shows Kevin how to flash a newly-installed window properly. Then, Richard helps a homeowner quiet a noisy PVC plumbing vent in her attic.

Landscaping contractor Roger Cook helps a homeowner install stone veneer over an ugly concrete retaining wall. Then Roger, along with host Kevin O'Connor, plumbing and heating expert Richard Trethewey and general contractor Tom Silva ask, "What is it?" Then, up in the loft, Richard shows Kevin how to retrofit dampers in forced-air HVAC ducts. Next, Tom shares a viewer tip about how to get the most from your can of insulating foam.

General contractor Tom Silva helps a homeowner install a new garage door. Then plumbing and heating expert Richard Trethewey shows a homeowner how to "winterize" his plumbing to prevent frozen pipes when the house is unoccupied.

General contractor Tom Silva helps a homeowner prepare his concrete basement walls for finished wallboard. Then, up in the loft, plumbing and heating expert Richard Trethewey shows host Kevin O'Connor how to tie a few basic knots. Next, Tom, Kevin and Richard, along with landscaping contractor Roger Cook ask, "What is it?" Then, Roger and certified arborist Matt Foti demonstrate how to care for storm-damaged trees.

Landscape contractor Roger Cook shows a homeowner how to prune her neglected crabapple tree properly. Then Roger, along with host Kevin O'Connor, general contractor Tom Silva and plumbing and heating expert Richard Trethewey ask, "What is it?" Later, Richard helps a homeowner install a new "anti-scald" shower-mixing valve.

General contractor Tom Silva helps a homeowner prepare a shower enclosure for tile using a new type of waterproofing system. Then Tom, along with host Kevin O'Connor, plumbing and heating expert Richard Trethewey, and landscaping contractor Roger Cook ask, "What is it?" Then, Roger helps two homeowners install a privacy screen using bushes and a decorative flower garden.

Richard is off to Chicago to help homeowner Dave Skena install a new garbage disposer. Back in the loft, Ricard, Tom, Roger and Steve examine two unfamiliar objects and try to guess how they're used. Outside the barn, Roger and hearing protection expert Dr. Mark Stephenson test the decibel level of several power tools. Inside, they show Tom several new types of hearing protection. More Info & Resources

Richard visits a homeowner and installs an automatic water shutoff valve on her combination washer/dryer. Then Richard, Tom, Roger and Steve examine two unfamiliar objects and try to guess how they're used. Tom then shows Steve the proper technique for preparing drywall joints and Richard discusses different types of plumbing torches. More Info & Resources

The crew helps replace a corroded fitting on a water heater and installs a vented range kitchen hood.

Landscaping contractor Roger Cook shows a pair of homeowners how to transplant a large, mature tree to their front yard. Then Roger, along with host Kevin O'Connor, plumbing and heating expert Richard Trethewey and general contractor Tom Silva ask, "What is it?" Then, Richard helps two homeowners sleep better at night by quieting their noisy heating system.

Landscaping contractor Roger Cook and host Kevin O'Connor show some different methods and tools for splitting firewood. Then, back in the workshop, professional painter Jeff Young shows Kevin how to choose, use, and care for paintbrushes. Then Kevin and Roger, along with general contractor Tom Silva and plumbing and heating expert Richard Trethewey ask, "What is it?" Then Richard uses an electric pump to connect a basement bar sink to a sewer drain.

Landscaping contractor Roger Cook and chainsaw expert Tim Ard demonstrate safe chainsaw use and a brand new way to sharpen chains. Then, general contractor Tom Silva helps a homeowner with a leaky rain gutter. Back in the workshop, Roger and Tom, along with host Kevin O'Connor and plumbing and heating expert Richard Trethewey ask, "What is it?" Then, Richard and Kevin install a new fiberglass bathtub and shower enclosure.

Landscaping contractor Roger Cook heads to Fargo, North Dakota, where he and a local crew help a homeowner build a new circular patio and fire pit. Then Roger, along with host Kevin O'Connor, general contractor Tom Silva, and plumbing and heating expert Richard Trethewey ask, "What is it?" Then, Tom and Kevin head outside to repair a set of brick stairs.

General contractor Tom Silva helps a homeowner replace the broken sash locks on his vinyl windows. Then, up in the loft, host Kevin O'Connor gets some tips on staining furniture and applying protective finishes from finishing expert Bruce Johnson. Afterward, landscaping contractor Roger Cook helps a homeowner protect her plants from the ravages of winter.

Landscaping contractor Roger Cook kicks off our 8th season by helping a homeowner build a cozy campfire pit in her backyard. Then Roger, along with general contractor Tom Silva, plumbing and heating expert Richard Trethewey and host Kevin O'Connor ask, "What is it?" Afterward, Tom helps a homeowner install a combination range hood and microwave oven over her kitchen stovetop.

Plumbing and heating expert Richard Trethewey helps a California homeowner install a new type of "zoning" control for her forced-air heating and cooling system. Then Richard, along with landscaping contractor Roger Cook, host Kevin O'Connor and general contractor Tom Silva ask, "What is it?" Next, Tom helps a homeowner re-grout the tile floor in her master bathroom.

Plumbing and heating expert Richard Trethewey helps a homeowner quiet his banging pipes by installing a water hammer shock suppressor. Then Richard, along with host Kevin O'Connor, general contractor Tom Silva and landscaping contractor Roger Cook ask, "What is it?" Then, Tom and Kevin show how to install a pre-hung fiberglass exterior door.

Up in the loft, general contractor Tom Silva shows host Kevin O’Connor how to repair damaged laminate countertops. Then, landscape contractor Roger Cook helps a homeowner rebuild a brick walkway. Then Tom, Kevin, Roger, and plumbing and heating expert Richard Trethewey ask, "What is it?" Then Richard shows Kevin several different types of filters for forced-air heating and cooling systems.

A home gym is built for a wounded Navy SEAL; and a faulty doorbell is repaired. Also: the important roles that 22 and 45 play under the sink.

Installing a Whole-House Humidifier in North Carolina; Installing Hardwired Smoke and Carbon Monoxide Detectors.

The crew shows a homeowner the proper way to insulate a wall using fiberglass batts and helps repoint a fieldstone foundation.

Up in the workshop, expert painter Mark O'Lalor shows host Kevin O'Connor a few tricks and techniques for painting an interior wall. Then Kevin, along with landscaping contractor Roger Cook, general contractor Tom Silva, and plumbing and heating expert Richard Trethewey ask, "What is it?" Afterward, Richard helps a homeowner install a new water heater with an electronic valve that prevents floods due to water leaks.

Plumbing and heating expert Richard Trethewey helps a homeowner heat his newly remodeled kitchen by installing hot water radiant tubing underneath the floor. Then Richard, along with host Kevin O'Connor, landscaping contractor Roger Cook, and general contractor Tom Silva ask, "What is it?" Afterward, Tom shows Kevin how to apply joint compound to drywall corners. Then Roger and Kevin head outside for a few lessons on using a wheelbarrow properly.

Roger Cook visits a nature center to learn how to attract many different species of birds using different types of bird feeders and birdseed. Tom Silva and Kevin O'Connor visit a home center to identify various types of interior moldings and their uses. In the Ask This Old House loft, Tom, Richard, Roger and Kevin examine an unfamiliar object and try to guess how it is used. Richard helps a homeowner conserve water by installing a new type of dual-flush valve in his existing toilet.

Hooking up a portable generator capable of powering an entire house; and repairing a poorly installed piece of wood floor nosing. Also: an inside look at dishwasher cycles.

Tom repairs a homeowner's antique window; Mauro talks through interior paint finishes; Jenn and Mark travel to Georgia to help a homeowner develop a landscape design plan for her small backyard. Then, they help her install a stone fire pit.

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

Nathan tightens a railing; Mauro strips paint off hardware; Richard upgrades a thermostat.

Replacing a stair railing; upgrading a door to make it look more modern; cleaning and painting vinyl shutters.

Tips for lawn care; and a jigsaw tutorial. Also: installing a motorized lift for a chandelier.

A chimney overhaul; the installation of an exhaust fan in a kitchen; and a tutorial on roof shingles.

Roger heads to Texas for a lesson on planting a butterfly garden. Tom maps out the best tools for woodworking beginners. And Scott helps a homeowner find illumination in her closet.

Installing landscape lighting; replacing a water main shutoff.

Building a high tunnel greenhouse; converting three recessed kitchen lights into three pendants. Selecting pliers and wrenches.

Repairing a Rotted Porch Post; Dealing With High Indoor Humidity

"Waffle Gardening" in Santa Fe; Adding Mechanical Dampers to a Forced-Air Heating System

Host Kevin O'Connor and electrician Scott Caron head to Denver to install a ceiling fan on a cathedral ceiling. Then, Kevin, along with general contractor Tom Silva, plumbing and heating expert Richard Trethewey, and landscape contractor Roger Cook ask "What Is It?" Afterward, Richard visits New Jersey to install a water softener.

Kevin helps install new vinyl trim around a window while Rich helps a homeowner put in a new dishwasher.

The Ask This Old House crew sends out an electrician to upgrade an electrical service from 100 to 200 amps. Roger tours a garden designed to attract butterflies.

Roger helps a homeowner remove several overgrown shrubs and plants new perennials. The crew quiets a noisy baseboard heater.

It begins with general contractor Tom Silva helping a homeowner seal out drafts by installing weather-stripping on her front door. Then, up in the loft, host Kevin O'Connor is joined by residential energy expert Paul Scheckel to discuss several ways to monitor and save electricity. Next, plumbing and heating expert Richard Trethewey helps a homeowner determine the proper size for a new heating system by performing a comprehensive heat-loss analysis.

Host Kevin O'Connor teams up with an electrician to install a home intercom system. Then Kevin, along with plumbing and heating expert Richard Trethewey, landscaping contractor Roger Cook and general contractor Tom Silva ask, "What is it?" Next, Richard helps a homeowner make a wood-burning fireplace cleaner and more energy efficient by installing a gas-burning insert.

Tom helps homeowners Annette Ritchie and Charlie Bubar remove the aluminum siding around their window and repair the damaged sill. Back in the loft, Tom, Richard, Roger and Steve examine two unfamiliar objects and try to guess how they're used. Then Jim shows Steve how to use different types of paint rollers while Roger and knife sharpening expert Stan Watson sharpen kitchen knives. More Info & Resources

Roger helps homeowner Mark Wegener remove the ivy covering his home in Madison, Wisconsin. Back in the loft, Roger, Steve, Tom and Richard examine two unfamiliar objects and try to guess how they're used. Tom then helps homeowner Christian Hansen replace the window in his third-floor condominium bathroom. Afterward, Tom explains the proper way to measure for a replacement window. More Info & Resources

Building an outdoor shower in Cape Cod; landscape touches.

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.

In this episode, Richard tests a faucet, and Mark installs a mantel. Ross and Mauro discuss why and how to remove cigarette smell from a home. Then, Heath connects 4 separate switches that control 6 lights in the same room.

Removing overgrown shrubs and replacing them with edible landscape; snaking drains; replacing damaged pieces of vinyl siding.

Tom demonstrates many uses for a router. Richard replaces an air conditioning unit that freezes when it runs. And the guys ask "What Is It?"

Landscape contractor Roger Cook shows a homeowner how to properly mulch his garden beds. Then Roger, along with host Kevin O'Connor, plumbing and heating expert Richard Trethewey, and general contractor Tom Silva ask "What Is It?" Afterward, Richard installs a natural gas line for a barbeque grill.

The crew helps repair a faulty shower valve and rebuild a wobbly stair banister.

General contractor Tom Silva helps a homeowner remove a vinyl kitchen floor. Then host Kevin O'Connor tours a well-stocked architectural salvage yard for vintage house parts. Back in the workshop, Kevin and Tom, along with landscaping contractor Roger Cook and plumbing and heating expert Richard Trethewey ask, "What is it?" Afterward, Richard helps a homeowner eliminate a gurgling sound coming from his bathroom plumbing.

In the first episode of a two-part road trip through America's heartland, landscaping contractor Roger Cook helps a homeowner in Wichita, Kansas plant a narrow garden bed near her driveway. Then, plumbing and heating expert Richard Trethewey, general contractor Tom Silva, and host Kevin O'Connor conduct home improvement workshops with live audiences in Memphis, Tennessee, Little Rock, Arkansas, and Tulsa, Oklahoma. Afterward, Richard and a local contractor make an old fireplace more energy efficient by installing a wood-burning insert.

Landscaping contractor Roger Cook helps a homeowner repair an uneven stone patio. Then Roger, along with host Kevin O'Connor, general contractor Tom Silva, and plumbing and heating expert Richard Trethewey ask, "What is it?" Then, Kevin and painting contractor Mauro Henrique help a homeowner repaint a rusty metal bulkhead door.

Landscaping contractor Roger Cook builds a raised garden bed that is accessible by wheelchair. Then, general contractor Tom Silva shows a homeowner how to repair a leak in his roof caused by a worn-out plumbing vent gasket.

Plumbing and heating expert Richard Trethewey helps a homeowner update the look of her bathroom by installing a new vanity cabinet, countertop, and sink. Then Richard, along with general contractor Tom Silva, landscaping contractor Roger Cook, and host Kevin O'Connor ask, "What is it?" Afterward, Tom and Kevin discuss several different types of wall insulation and how each is installed.

General contractor Tom Silva helps a pair of homeowners install a new siding glass door. Afterward, Tom, along with host Kevin O'Connor, landscaping contractor Roger Cook and plumbing and heating expert Richard Trethewey ask, "What is it?"

This episode demonstrates how to repair a leaking PVC drain trap under a kitchen sink, how to install a bamboo "floating" floor in a basement, and how to clean roof gutters without a ladder.

Kevin O'Connor and electrician Brian Bergeron help a homeowner install a new ventilation fan in her bathroom. Tom, Kevin O'Connor, and Richard Trethewey examine an unfamiliar object and try to guess how it is used. Roger Cooks show two homeowners how to care for their lawn without using pesticides or chemicals. He obtains a soil test before performing work on the lawn, then he spreads lawn fertilizer with chicken manure as the primary ingredient and uses grass seed enhanced with fungal endophytes.

Plumbing and heating expert Richard Trethewey helps a homeowner install a new "dual flush" water-saving toilet. Then Richard, along with host Kevin O'Connor, landscaping contractor Roger Cook and general contractor Tom Silva ask, "What is it?" Next, Roger and Kevin head outside to install an in-ground sprinkler system that any homeowner can install.

Landscaping contractor Roger Cook helps a homeowner in Charleston, South Carolina fix a sagging wooden gate. Then Roger, along with plumbing and heating expert Richard Trethewey, host Kevin O'Connor, and general contractor Tom Silva ask, "What is it?" Then, Tom helps a homeowner replace his drafty old basement windows with new energy-efficient ones. Later, up in the loft, Tom and Richard discuss how to properly use different types of liquid foam insulation to prevent drafts.

General contractor Tom Silva shows a homeowner how to save energy and money by increasing the insulation in his attic. Then, landscape contractor Roger Cook makes a dark walkway safer by adding low-voltage landscape lighting. Afterward, plumbing and heating expert Richard Trethewey helps a homeowner replace her old kitchen faucet.

Landscape contractor Roger Cook shows host Kevin O'Connor several different ways to determine the grade, or pitch, of a landscape. Then, back in the loft, Roger and Kevin, along with general contractor Tom Silva and plumbing and heating expert Richard Trethewey ask, "What is it?" Then, Tom and Richard show Kevin different ways to "see" what's inside a wall. Finally, Richard helps a homeowner repair a bathtub that won't hold water.

Landscape contractor Roger Cook replaces the cracked flagstone on a set of front steps with bluestone. Roger, along with host Kevin O'Connor, general contractor Tom Silva, and plumbing and heating expert Richard Trethewey ask, "What is it?" Then, Richard visits a serious cook and helps her replace her old electric stove with a new gas range.

Plumbing and heating expert Richard Trethewey helps a pair of homeowners with a jammed kitchen garbage disposer. Then Richard, along with host Kevin O'Connor, general contractor Tom Silva and landscape contractor Roger Cook ask, "What is it?" Then, Kevin learns from a painting expert how to remove exterior paint from cedar siding. Back in the loft, Tom and Richard show Kevin the do's and don'ts of cutting holes and notches in joists.

Up in the loft, plumbing and heating expert Richard Trethewey shows host Kevin O'Connor a few devices for preventing plumbing floods in the home. Then, Roger helps a pair of homeowners remove some overgrown shrubs and replace them with appropriate "foundation plantings." Then Richard and Roger, along with general contractor Tom Silva and host Kevin O'Connor ask, "What is it?" Then, Tom shows Kevin how to repair a rotted windowsill using a two-part epoxy.

Plumbing and heating expert Richard Trethewey helps a homeowner replace a broken cast-iron "closet flange" for a toilet. Then Richard, along with landscape contractor Roger Cook, general contractor Tom Silva and host Kevin O'Connor ask, "What is it?" Afterward, Tom helps a homeowner repair a cracked plaster wall using a new type of adhesive system. Back in the loft, Roger shares a tip from a viewer about digging holes.

Plumbing and heating expert Richard Trethewey heads to Cleveland, Ohio to help a homeowner replace a bathtub drain trap. Then Richard, along with general contractor Tom Silva, landscape contractor Roger Cook and host Kevin O'Connor ask, "What is it?" Afterward, Tom helps a homeowner repair a cracked drywall ceiling.

Richard Trethewey helps a homeowner refinish her cast iron radiators. They remove the radiators and take them to a restoration specialist, who sandblasts the peeling paint and applies a new finish and makes them look new. Afterward, Kevin O'Connor travels to St. Louis to help a homeowner install a standby generator who lives an area with frequent power outages that last for several days.

Roger shows homeowner Doug Ferguson of Hudson, Massachusetts how to recycle his yard waste through composting. They visit a compost bin test site where they meet compost expert Ann McGovern from the Massachusetts Department of Environmental Protection. Then Roger, Tom, Richard and Kevin ask, ""What Is It?"" in the Ask This Old House loft. Later, Richard helps homeowner Kate Smukler of Arlington, Massachusetts remove an old cast-iron house trap on her main sewer line so that a clog can be easily cleared. More Info & Resources

Chimney flue repairs; installing an anti-sweat valve to prevent condensation on a toilet tank.

A clogged drain is fixed; and an electric convection heater is installed in a chilly bathroom. Also: a masking primer that leaves clean lines on a window.

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.

Restoring a beehive oven; failure points in toilet tanks and how to repair them; building a metal coat rack.

The Season 14 premiere features a whole house fan installation; and an explanation of new water heater regulations. Also: working with students to liven up a school's garden.

Host Kevin O'Connor and plumbing and heating expert Richard Trethewey head to Virginia to help a homeowner replace his old, electric water heater with a heat pump water heater that uses much less electricity. Then, up in the loft, Richard and Kevin, along with general contractor Tom Silva and landscaping contractor Roger Cook ask, "What is it?" Afterward, Roger and Kevin discuss propane-fueled mosquito traps and how to keep them working properly. Then Tom helps a homeowner install exterior trim against a very uneven stone chimney.

Landscaping contractor Roger Cook visits Harvard University to learn about their new organic lawn-care program and shows host Kevin O'Connor how to make his own "compost tea." Then, Roger and Kevin, along with general contractor Tom Silva and plumbing and heating expert Richard Trethewey ask, "What is it?" Afterward, Tom helps a homeowner prevent mildew in his attic by re-routing a bathroom fan that was improperly vented near a soffit.

Landscaping contractor Roger Cook travels to Baltimore, where he helps transform a small urban backyard into a pleasant outdoor living space. Then Roger, along with general contractor Tom Silva, host Kevin O'Connor, and plumbing and heating expert Richard Trethewey ask, "What is it?" Afterward, up in the loft, Tom shows Kevin some new ways to install fiber cement siding without creating a lot of dust.

General contractor Tom Silva helps a homeowner clean, stain and seal his mahogany backyard deck. Then Tom, along with host Kevin O'Connor, plumbing and heating expert Richard Trethewey and landscape contractor Roger Cook ask, "What is it?" Kevin makes a House call to Chicago to help a homeowner prevent sewage backup in her basement by replacing her flood control system. In the Ask This Old House loft, Tom and Richard share a viewer tip on how to remove a wood plug from a hole saw.

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 her refrigerator with an icemaker.

General contractor Tom Silva helps a homeowner repair a rotted windowsill. Then Tom, along with host Kevin O'Connor, landscaping contractor Roger Cook, and plumbing and heating expert Richard Trethewey ask, "What is it?" Then, Roger shows Kevin a few gardening tools designed for people with limited mobility. Afterward, Richard helps a homeowner install an outdoor faucet.

Landscaping contractor Roger Cook helps a pair of homeowners build a retaining wall using pressure-treated timbers. Afterward, Roger, along with general contractor Tom Silva, plumbing and heating expert Richard Trethewey and host Kevin O'Connor ask, "What is it?" Then, Richard has an easy fix for a kitchen faucet that is making a loud, shuddering sound.

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.

Tom visits a young couple and teaches them how to repair a cracked plaster ceiling in their condominium. In the workshop loft, Richard and Steve rebuild a toilet to prevent it from continuously filling. Roger uses a stump grinder to remove an old tree stump from a homeowner's front yard. Back in the loft, Tom replaces a broken pane of glass and reglazes a window sash. More Info & Resources

Making a bathroom more accessible; restoring rotten wooden gutters

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

In this episode, Tom explains the architecture, installation, and maintenance of white cedar shingles. Richard repairs a hose spigot, and Jenn builds and plants a self-watering vegetable garden.

Repairing an old dining room built-in with hand tools. Home inspection nightmares. Installing a chandelier in a dining room.

Tom discusses the conversations a homeowner and a contractor should have before starting a renovation project; Richard travels to Orlando to diagnose and repair an HVAC system that is creating way too much humidity; Mauro demonstrates the technique for using a paint sprayer; Mark travels to Denver to patch a hole in a brick wall.

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.

A cutting board is made from scrap heart pine; an overly bright room is recast with LEDs; and mice-preventive measures are discussed.

A deck is given festive lighting; and fireplace options are discussed. Also: the best tools for first-time gardeners.

A washer and dryer are installed; and a chandelier is added to a dining room. Also: using a power driver.

Roger heads to Cape Cod to transform a patch of grass into a lawn you can drive on! In "Build It," Tom and Kevin use reclaimed oak wood to create a coffee table. Richard explains how to keep pipes from freezing in the winter months. And the guys ask, "What Is It?"

Chainsaw safety is discussed; a garage's electrical connection is improved; and squeaky floors are silenced in a baby's room.

Roger transplants a specimen maple tree. Fixing an underground master bathroom.

The final episode of the 2012/13 season investigates how subway trains are serviced. The crew shows how to paint kitchen cabinets; estimate landscape material by the cubic yard; and how to install a smart thermostat.

How to make and install custom concrete countertops. Can you install watertight connections without soldering? Cordless landscape tools.

Master electrician Scott Caron installs several types of surge protection. Then, general contractor Tom Silva, host Kevin O'Connor, landscape contractor Roger Cook, and plumbing and heating expert Richard Trethewey ask "What Is It?" Afterward, Roger demonstrates how to cut and shape stones for hardscaping projects.

General contractor Tom Silva and host Kevin O'Connor demonstrate how to use all types of ladders safely. Then plumbing and heating expert Richard Trethewey replaces a three-handle shower valve with a single-handle antiscald valve.

Plumbing and heating expert Richard Trethewey and host Kevin O'Connor install a ductless heat pump to heat and cool a room. Richard, Kevin, landscape contractor Roger Cook, and general contractor Tom Silva ask "What Is It?" Master electrician Scott Caron demonstrates new technologies and applications for LED lighting. Roger learns how to select houseplants for different situations.

Plumbing and heating expert Richard Trethewey visits Cortland, Illinois, to learn how corn is harvested and then to help a homeowner insulate ductwork. Landscape contractor Roger Cook demonstrates proper pruning technique. Roger, Richard, host Kevin O'Connor, and general contractor Tom Silva ask "What Is It?" Kevin learns how to maintain washers and dryers.

In the workshop, general contractor Tom Silva and host Kevin O'Connor build a storage bench for an entryway. Then, plumbing and heating expert Richard Trethewey demonstrates how to solder copper pipes properly. Afterward, landscape contractor Roger Cook helps a homeowner maintain an overgrown perennial garden.

Host Kevin O'Connor meets appliance repairman Richie Isaacson to learn how to maintain kitchen appliances. Then, Kevin, along with landscape contractor Roger Cook, plumbing and heating expert Richard Trethewey, and general contractor Tom Silva ask "What Is It?" Afterward, Tom helps a homeowner install a rain gutter, downspout, and rain barrel.

Kevin and Roger provide some tips on refinishing with spray paint while Tom Installs a pre-finished wood floor.

The guys repair a crack in an asphalt walkway and help a homeowner get rid of mold.

Roger Cook shows a homeowner how to use and maintain string trimmers for a variety of landscaping chores. Tom Silva and Kevin O'Connor discuss different types of woodworking clamps and their uses. Tom also shows how rubber surgical tubing and rubber bands can be used as clamps when only light pressure is needed. In the Ask This Old House loft, Tom, Richard, Roger and Kevin examine an unfamiliar object and try to guess how it is used. Kevin and a remediation team help a homeowner remove lead paint from her old house by using hand scrapers and chemical strippers.

Plumbing and heating expert Richard Trethewey helps a homeowner convert a claw foot bathtub into a shower. Then Richard, along with host Kevin O'Connor, general contractor Tom Silva and landscape contractor Roger Cook ask, "What is it?" Later, Tom shows Kevin how to use different types of "fillers" for both wood and PVC trim. Then Roger helps a homeowner install a solar-powered fountain in her yard.

Plumbing & heating expert Richard Trethewey and host Kevin O'Connor replace an old tank-type water heater with a new, energy-efficient "tankless" unit fueled by propane. Then Richard and Kevin, along with landscaping contractor Roger Cook and general contractor Tom Silva ask, "What is it?" Then, Roger helps a homeowner level his sagging concrete walkway using a method called "mudjacking," and Tom shares a viewer tip for removing hammer dents from a piece of wood.

Landscaping contractor Roger Cook helps a pair of homeowners break apart and remove a large boulder in their backyard. Then Roger, along with host Kevin O'Connor, plumbing & heating expert Richard Trethewey and general contractor Tom Silva ask, "What is it?" Next, Richard helps two homeowners secure their loose pipes inside a shower wall and Tom shares a viewer tip about getting a secure grip on a hammer.

Plumbing and heating expert Richard Trethewey heads to Phoenix, Arizona to help a pair of homeowners install a new water softening system. Then, general contractor Tom Silva shows a homeowner how to install fiber-cement shingles on his new backyard shed.

Plumbing and heating expert Richard Trethewey helps a homeowner with a smelly dishwasher. Then Richard, along with landscape contractor Roger Cook, host Kevin O'Connor and general contractor Tom Silva ask, "What is it?" Roger heads to Iowa to help a homeowner transplant a rose bush. Afterward, up in the loft, Tom shows Kevin the proper way to change a circular saw blade.

Plumbing and heating expert Richard Trethewey helps a homeowner control the temperature of her radiators, which are overheating the rooms upstairs. Then Richard, along with host Kevin O'Connor, general contractor Tom Silva and landscape contractor Roger Cook ask, "What is it?" Then, Tom helps a homeowner squeeze a new refrigerator into an opening that's just a little too small. Finally, Roger shares a tip from a viewer on how to tame a tangle of bungee cords.

Landscape contractor Roger Cook helps a homeowner install a new vinyl fence. Then host Kevin O'Connor heads to Omaha, Nebraska, where he helps install a protective epoxy coating on a homeowner's garage floor.

Landscape contractor Roger Cook shows a homeowner in Portland, Oregon an innovative way to handle storm-water runoff from her roof. Later, Roger is joined in the loft by host Kevin O'Connor, general contractor Tom Silva and plumbing and heating expert Richard Trethewey to answer the question, "What is it?" Then, Tom shows a homeowner how to refinish her hardwood floors.

Landscape contractor Roger Cook is on a special mission to pick the perfect Christmas tree at a local tree farm. Later, up in the loft, Roger shares a few tips for keeping Christmas trees healthy throughout the holiday season. Then Roger, host Kevin O'Connor, plumbing and heating expert Richard Trethewey and general contractor Tom Silva try to answer the question, "What is it?" Afterward, Tom heads to Florida to show a homeowner the proper way to caulk a leaky window.

Landscape contractor Roger Cook helps a young couple transform a muddy backyard into a low-maintenance play area for their two children. Then, up in the loft, plumbing and heating expert Richard Trethewey shows host Kevin O'Connor several different types of portable space heaters and offers suggestions on how to choose the right one. Then Roger, Kevin and Richard are joined by general contractor Tom Silva for the regular "What is it?" segment. Afterward, Tom helps a homeowner with a bathroom fan that drips water down into the room.

In this special episode, the crew demonstrates several ways to save energy at home. First, general contractor Tom Silva helps a homeowner select and install energy-efficient "replacement" windows. Up in the loft, plumbing and heating expert Richard Trethewey shows host Kevin O'Connor a few ways to reduce the energy needed for heating water. Then, Kevin and an energy auditor visit a home and discuss how to improve the heating and air conditioning system and reduce electrical consumption.

Landscape contractor Roger Cook and arborist Matt Foti help a homeowner remove an old tree that threatens to fall on her house. Then Roger, along with host Kevin O'Connor, plumbing and heating expert Richard Trethewey and general contractor Tom Silva ask, "What is it?" Then Tom helps a homeowner bring some character into a room by installing wood trim around a plain doorway.

In the Ask This Old House loft, Tom Silva shows host Kevin O'Connor how to build a simple workbench. Roger, Kevin O'Connor, Richard Trethewey and Tom Silva examine an unfamiliar object and try to guess how it is used. Roger then gives Kevin tips on how to tune-up a gas-powered lawn mower. Then Richard silences a whistling forced-air heating system by installing a bypass duct.

Roger shows two young homeowners the proper methods for mowing and edging their front lawn. In the Ask This Old House loft, Tom, Richard, Roger and Kevin examine an unfamiliar object and try to guess how it is used. Richard shows Kevin how to repair and maintain electric water heaters. Tom helps a homeowner repair a broken stair tread using a new type of wooden dowel.

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.

Jenn helps a couple rethink their front yard after two removed trees changed the shade pattern of the space; Richard talks about the mentors who helped him become a passionate teacher on This Old House; Richard gives Kevin a tour of the building he and his son, Evan Trethewey, have renovated to bring a new experience of mechanical equipment to contractors

Jenn shares why she loves bringing her dog to work; Heath helps a homeowner troubleshoot a strobing dimmer switch; Ross explains the benefits of smart bath ventilation; Tom builds a DIY clothes rack.

General contractor Tom Silva shows a homeowner how to remove moss and lichen from his shade-covered roof and keep them from coming back. Then Tom, along with plumbing and heating expert Richard Trethewey, landscaping contractor Roger Cook, and host Kevin O'Connor ask, "What is it?" Up in the loft, Richard shows Kevin how to repair a leaky valve by replacing the washer and valve seat. Then, Roger helps a homeowner plant shade-loving groundcover under a 100-year-old beech tree.

General contractor Tom Silva helps a homeowner with a large carpentry project: rebuilding a small exterior deck. They start by removing the existing deck, which has rotted and become unstable. Together, they build a new deck, including stairs and handrails, using pressure-treated lumber and composite deck boards.

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.

Lee Gilliam helps a homeowner figure out why grass doesn't grow in his backyard before installing a shade-tolerant species of sod; Ross Trethewey talks through converting houses' heating and cooling systems to heat pumps; Kevin O'Connor meets maker Sarah Nadarajah, the creator of Rocky Canyon Rustic, to learn about her content before building a replica high-end side table.

In the barn loft, Richard ""clears up"" the mysteries of clogged bathtub drains. Then, Tom helps Marblehead, Massachusetts homeowner Terry Lavelle replace his double-hung window weights with spring loaded sash balancers. Afterwards, Tom shows Kevin how to insulate the empty window weight pockets to prevent cold winter drafts. Then Tom, Richard, Kevin and Roger ask, ""What Is It?"" Finally, Roger helps a very thoughtful tenant, Brett Campbell of Arlington, Massachusetts, plant a low-maintenance garden for his elderly landlady. More Info & Resources

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.

Richard helps a homeowner replace a leaking gas oven; Jenn and Kevin discuss how to create a pollinator garden at home; in Future House, Ross learns how wireless electricity technology can be applied to electric vehicle chargers in future homes.

Painting wainscoting; what homeowners should know before switching a home to all electric; building a sandbox.

Jenn works with a wetlands specialist; Ask This Old House profiles general contractor Zach Dettmore in a new segment; Ross discusses Indoor Air Quality testing; Mauro teaches a homeowner how to repaint an exterior, concrete foundation.

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 hearth of a fireplace with granite.

Ross helps a homeowner dealing with ice dams decide whether to insulate from his attic roof rafters or the attic floor; Richard shares tips on irrigation repairs; Mark expands a driveway by adding an asphalt parking spot.

Nathan Gilbert shares his own experience as a Boy Scout and introduces his niece's Girl Scout troop and the project they need help with; Tom Silva and Kevin O'Connor create a two-layered hexagonal herb planter for the garden; Jenn Nawada and Nathan pick up materials to build a garden bed and then team up to help the Girl Scout troop rebuild and replant their community garden beds.

Restoring a bulkhead; combination squares; repairing crumbling mortar on brick front stairs.

Jenn Nawada teams up with a water conservation expert in Portland, Oregon to help two homeowners install a rain garden; Ross Trethewey shares how moisture meters can detect unseen water damage; Mark McCullough helps a homeowner increase the safety of their concrete steps by installing a wrought iron railing and showcases how railings are made at an iron fabrication facility.

Ask This Old House welcomes landscape contractor, Lee Gilliam to the cast and shines a spotlight on his 30 years of experience; Richard Trethewey helps a homeowner repair a leaking 3-valve shower while retaining the bathrooms original 1930's tile; Lee and Jenn Nawada work together to refresh a homeowner's eroding sloped yard; removing excess mulch, and installing boulders and ground cover plants.

Repairing and updating a fireplace surround; drip edges.

In the Ask This Old House loft, Tom shows Kevin a few ways to recreate different molding profiles. Then, Roger heads to Skokie, Illinois where he has some ""uplifting"" advice for a homeowner with a sinking brick patio. After that, Tom, Roger, Richard and Kevin guess ""What Is It?"" in the loft, Then, Jim shows Kevin and homeowner Caroline Pooler of Andover, Massachusetts a new way to strip wallpaper. More Info & Resources

Homeowner Martin D'Agostino of Swampscott, Massachusetts receives a visit from Tom who knows him how to repair and replace his rotting deck balusters. Then Tom, Richard, Roger and Kevin ask, ""What Is It?"" in the Ask This Old House loft. Afterwards, Richard heads off to Salem, Massachusetts to hook up a refrigerator's ice-maker and water dispenser for homeowner Joe Cole. More Info & Resources

Richard helps homeowner Tom Pulkowski of Chelmsford, Massachusetts clear a clogged vent stack with the aid of a fiberoptic plumbing snake. Then Richard, Roger, Tom and Kevin ask, ""What Is It?"" Then Roger helps homeowner Dennis Cronin of Duxbury, Massachusetts build an ice skating rink in his backyard. More Info & Resources

Richard helps a pair of homeowners from Arlington, Massachusetts install an electronic air cleaner on their forced-air furnace. Then Roger shows Kevin some tools and materials for removing ice from concrete walkways. And Tom shows homeowner Enza Sheehan of Swampscott, Massachusetts how to properly vent a bathroom fan to the outside of the house. More Info & Resources

Up in the loft, Tom shows Kevin a few tricks for using one of the most basic tools, a tape measure. Then master electrician Allen Gallant visit homeowner Kristen Berger of Leominster, Massachusetts and brightens up a dimly-lit basement with new fluorescent fixtures. Then Tom, Kevin, Richard and Roger ask, ""What Is It?"" Later, Kevin shows Roger a software package that can be used to create a three-dimensional landscape plan. And Richard makes a house call to homeowner Wendy Smith in Duxbury, Massachusetts and shows her how to replace the banged-up aluminum cover on an old baseboard heater. More Info & Resources

Tom makes a house call to Atlanta, Georgia to show homeowner Terry Andrews how to use masonry fasteners to install window boxes on his brick townhouse. Then Tom, Richard, Roger and Kevin ask, ""What Is It?"" Then, back in the loft, Richard shows Kevin several different ways to make copper pipe connections, including a new solderless system. Then, Roger helps homeowner Alan Lear of Carlisle, Massachusetts install a perimeter drain to catch rainwater running off of his roof. More Info & Resources

Landscape contractor Roger Cook heads to Oregon to help a homeowner improve her lawn, starting with a simple soil test. Next, Roger, along with host Kevin O'Connor, general contractor Tom Silva and plumbing and heating expert Richard Trethewey ask, "What is it?" Then, Richard and Kevin visit a local home center to identify several different types of water supply pipes.

General contractor Tom Silva demonstrates how to install an old mortise lockset on a new door. Afterwards, plumbing and heating expert Richard Trethewey helps a homeowner install a pellet stove to provide supplemental heat during the cold winter months. Back in the loft, landscape contractor Roger Cook shows host Kevin O'Connor several different types of lawn mowers that do not require gasoline.

Landscape contractor Roger Cook replaces a set of rotten wooden stairs with new steps made of granite. Back in the loft, host Kevin O'Connor shows general contractor Tom Silva the latest technology for deadbolt locks. Afterward, Richard travels to Raleigh, North Carolina to help a homeowner replace the leaky polybutylene pipes throughout his house.

Landscape contractor Roger Cook shows host Kevin O'Connor how to improve a lawn using a "slice seeder." Next, plumbing contractor Richard Trethewey and general contractor Tom Silva share a tip from a viewer on how to drive a nail in a tight spot. Afterward, Kevin is joined in the loft by a real estate specialist for some tips on preparing a home for sale. Finally, Richard visits a homeowner to help fix a water leak in her living room ceiling.

This special episode is dedicated to the life and work of tile expert Joe Ferrante. Joe worked on many projects for This Old House and Ask This Old House over 20 years. This episode begins with Joe helping a homeowner replace a broken bathroom tile with a new tile that matches the existing color. Next, up in the loft, Joe shows host Kevin O'Connor some different ways to cut ceramic and stone tile using both hand and power tools. Finally, Joe helps another homeowner install a kitchen backsplash using translucent glass tile.

Plumbing and heating expert Richard Trethewey helps a homeowner with very high water pressure by installing a "pressure reducing valve." Next, landscape contractor Roger Cook is joined in the loft by turf expert Mary Owen to discuss which types of grass are appropriate for certain climates and conditions. Then Roger and Richard, along with host Kevin O'Connor and general contractor Tom Silva ask, "What is it?" Afterward, Tom helps a homeowner who ran into a problem while installing crown molding on his kitchen cabinets.

Up in the loft, plumbing and heating expert Richard Trethewey shows host Kevin O'Connor how to replace all the parts inside a typical toilet tank. Next, landscape contractor Roger Cook and Kevin head outside for a look at different types of above-ground sprinklers and some basic tips on watering a lawn. Finally, back in the loft, Tom shows Kevin how to build a very simple but elegant bookcase using plywood and portable power tools.

Installing a bluestone patio; hanging bikes in a small garage.

The crew visits New York City, where plumbing and heating expert Richard Trethewey tours a scale model of the city. Host Kevin O'Connor and a local electrician add task lighting to a Brooklyn kitchen. The guys play "What Is It" in Times Square with Jimmy Fallon. Landscape contractor Roger visits the Highline. General contractor Tom installs cable deck railing in Greenwich Village.

Practical solutions for drought. Included: replacing a water-guzzling lawn with a desert-appropriate alternative; and replacing an old-fashioned toilet with a "water sense" solution. Also: meteorologist Jim Cantore shares cautionary tales from the front lines of the drought.

It's summertime and the team are here to help with some fun outdoor projects! Tom travels to Colorado to help a couple build a swing set for their young son; Jenn travels to Raleigh, North Carolina to help a couple build a self-watering vegetable garden that will survive even if they go away on vacation; Mark helps a homeowner build a cost effective firepit for his backyard that comes in a kit.

Mauro helps a homeowner upgrade a fireplace; Jenn introduces landscape contractor Lee Gilliam, and together they discuss different landscape tools and how to maintain them for Spring; Tom and Kevin Build a bathtub tray out of zebrawood.

Nathan mills a large piece of an old red oak tree. The team come together to see if they can guess each other's cards in a special Ask This Old House headband game; Tom and Nathan team up to build a bar top out of the milled piece of red oak.

Richard Trethewey helps a homeowner troubleshoot why her upstairs shower runs out of hot water so quickly and helps her install a heat pump water heater; Kevin O'Connor returns to maker Jimmy DiResta's workshop in Upstate New York to get a lesson in leatherworking as they hand stitch a leather tote bag.

Installing a whole house humidifier system; how to quickly paint shutters in bulk; creating a triangular top outdoor end table out of teak wood.

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.

The team shares the professions they might have pursued; Mauro discusses types of wallpaper and tools to remove it; Heath explains how different amped receptacles can cause breaker trips; Nathan helps install kitchen cabinet hardware.

Heath Eastman helps a homeowner install outdoor-grade remote-controlled patio string lights over their backyard patio; Mauro Henrique color matches a homeowners retro aqua kitchen cabinet and repaints it to match the rest of the vintage kitchen; Mauro takes a sample of the aqua-colored kitchen cabinet and heads to Home Depot to demonstrate the color matching process.

Nathan Gilbert heads to Tulsa, Oklahoma to build a replacement utility cover. Ross Trethewey discusses low-level carbon monoxide exposure, symptoms, and differences in CO detectors and low-level monitors. Mark McCullough helps a homeowner clean out creosote build-up in their kitchen fireplace and explains the dangers of creosote build-up, options for removal, and the safety preparation involved.

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.

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.

Tom Silva is rarely stumped. But when a homeowner reached out about a missing hand-turned spindle in the staircase of her 1900s Queen Anne Rowhouse, Tom attempts to replicate the spiral-detailed spindles on his lathe. There, he turns straight grain fir balusters and troubleshoots a string technique to replicate the spiral detailing.

Heath Eastman shares what factors to consider when selecting a generator, such as fuel or electrical load, and the options that are available; Jenn Nawada shares how to build a worm farm, what foods to incorporate and exclude when feeding the worms, and the many benefits of worm composted soil; Mauro Henrique refreshes a homeowner's vintage front door with a fresh coat of paint.

Nathan Gilbert shares his love of flea markets, what items he's found, and what he recommends looking for; Mauro Henrique teaches a homeowner how to paint over old garage graffiti and which primer is right for the job; Ross Trethewey shares how radon tests can detect harmful levels of radon in homes; Nathan helps a homeowner ready her nursery for a second baby by installing closet shelving.

Nathan Gilbert helps a homeowner add shade to a pool area using a shade sail and unique anchor points; Ask This Old House spotlights the brothers of Jordan's Legacy Landscaping, a fourth-generation landscaping company in the Atlanta area; Mark McCullough helps a landlord make a cost-effective repair to her tenant's concrete walkway.

A women's only do-it-yourself class; selecting and installing plants for a terraced garden; how homeowners and contractors should communicate about expectations for home improvement projects.

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.

Heath Eastman shares his tips and tools homeowners can use to identify and label home circuit breakers; Tom Silva discusses his hobby of lathe turning, why he enjoys it, and shares some of his favorite pieces he's created. Then, in Build It, he shows how to turn a segmented bowl, which is comprised of multiple pieces of wood glued together and turned, creating a unique visual effect.

Mauro Henrique discusses how he sees color, and shares some of his favorite colors to use for projects; Then, he updates a homeowner's office by painting over dated wood paneling with the perfect dark blue; Lee Gilliam discusses various shrub pruning tools; Nathan Gilbert heads to Portland, Oregon to help a homeowner build a sensory mud kitchen for her at-home daycare.

Ask This Old House kicks off its 7th season on PBS. General contractor Tom Silva prevents a garage roof from collapsing by replacing a rotting support post. Then Tom, along with host Kevin O'Connor, landscaping contractor Roger Cook and plumbing and heating expert Richard Trethewey ask, "What is it?" Then, Roger helps two homeowners dry out their basement by installing a dry well to handle discharge from their sump pump.

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.

Not all landscape projects require starting from scratch. Many times, working with plants already there can make a huge impact. In this special episode, Jenn Nawada uses an historic landscape design from a protege of Frederick Law Olmsted to transform a yard. She updates a landscape by moving around, dividing, and pruning current plants in the yard. Finally, she designs a secret garden.

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.

Nathan, Heath, and Mauro help a homeowner baby proof her house by replacing old receptacles and installing cabinet locks, and baby gates; Jenn breaks down the basics of caring for houseplants; Richard explains how septic systems works and maintain them.

Richard replaces a leaking kitchen faucet with a new hands-free model. Kevin explains rechargeable batteries. Roger installs a channel drain in a driveway to divert rainwater. And the guys ask "What Is It?"

Installing a vertical garden; uses for different drill bits; advances in toilet engineering that help save water.

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

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.

Nathan Gilbert helps a homeowner create a backyard entrance by converting a window into a backdoor; The team discusses what they look for in houses for sale that could be considered deal breakers for homeowners not looking to undertake major repairs or renovations.

Jenn installs a plunge pool for a homeowner with a small backyard; Tom gives some basic tips about insulating an attic; Richard travels to Celebration, Florida to help a homeowner select and install the right electric water heater.

Upgrading an irrigation system; home inspection nightmares; kitchen renovations; building an Adirondack-style outdoor chair with Jimmy DiResta.

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.

The entire cast reflects on the 20th anniversary of ASK THIS OLD HOUSE. They'll discuss how the show was made and what they think the legacy of the television program will be moving forward.

Jenn helps a homeowner transform a small sun and shade backyard with a new garden; Tom explains the importance of gutter downspouts; Mark adds street visibility to a farm by remounting an original farm sign and engraving an 1800s granite post.

The Ask This Old House team head to California to explore a variety of ways that homeowners can protect their houses against wildfires. Jenn Nawada learns about local flora and helps firescape a front yard, Tom Silva learns how to fire harden a home's exterior, and Richard Trethewey learns a unique weeding technique that helps to mitigate the risk of fire spreading.

Richard examines homeowner Kerry Goodwin's leaky shower tub faucet. Together, they purchase the replacement parts from a local plumbing supply company and repair the fixture. Then Richard, Tom, Roger and Steve examine an unfamiliar object and try to guess how it's used. Jim helps homeowners Kathleen and Kevin O'Connor remove painted wallpaper. And back in the loft, Tom and Steve demonstrate several hot glue guns, including a new cordless model. More Info & Resources

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.

Lee Gilliam shares the key tools and products to include in a winter weather kit to prepare for winter; Mark McCullough shares his favorite homeowner-friendly masonry tools and how to use them for entry level projects; Tom Silva and Kevin O'Connor upgrade the workspace by building a new mobile miter saw station, featuring two work benches and cabinets for extra storage.

Lee Gilliam helps a homeowner clean up his backyard by removing a diseased tree and shows how to remove and maintain invasive plants; Mark McCullough discusses the function of chimney caps, options available, and how homeowners can know if they need to install one; Richard Trethewwey installs a toilet with a built-in bidet for a homeowner and shares the variety of options available.

Host Kevin O'Connor and child safety expert Jeff Baril visit a homeowner to "childproof" her home. Then Kevin, along with general contractor Tom Silva, landscaping contractor Roger Cook, and plumbing and heating expert Richard Trethewey ask, "What is it?" Afterward, Richard helps a homeowner install a back-up sump pump that is powered by municipal water pressure instead of electricity.

General contractor Tom Silva and host Kevin O'Connor show how to build and install new laminate kitchen countertops. Then Tom and Kevin, along with landscaping contractor Roger Cook and plumbing and heating expert Richard Trethewey ask, "What is it?" Next, Roger helps a homeowner create a clean border between a garden bed and a lawn using steel edging.

Kevin helps a home owner stain a cedar fence while Roger and Tom provide some tips for installing window boxes.

Plumbing and heating expert Richard Trethewey heads to Cheyenne, Wyoming, to help a homeowner install a toilet. Then, Richard, along with landscape contractor Roger Cook, host Kevin O'Connor, and general contractor Tom Silva ask "What Is It?" Roger and Kevin patch a lawn with grass seed.

Tom trims a coat closet to include a shelf and hanger pole and then installs a pre-hung door. Richard explains why a toilet may be leaking. And Scott gives an old Philadelphia church a new look with an outdoor wall sconce.

Installing a new type of water softener; a home organization app; building a shadow box using wood from an old door.

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.

Nathan shows Kevin some old drywall paneling he found, and Richard teaches a homeowner how to clean her shower cartridge. Tom teaches Kevin the basics of using a lathe, and then they turn a bowl together.

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

Heath explains the three levels of EV chargers and which scenarios they work best for; Mark breaks down different brick patterns, where they originate from, and their pros and cons; Nathan helps a homeowner repair a cracked built-in china cabinet using MDF panels; Mauro then repaints the china cabinet and shows how to paint on MDF.

Heath Eastman assists a homeowner who wants to hook up a generator to their home by installing a transfer switch to the circuit board; Environmental contractor, Ron Peik demystifies asbestos and shares options for mitigation; Mark McCullough fixes a faulty brick lintel repair on an 1833 home, discusses the difference between Flemish and American bond, and how to match existing mortar and joints.

Richard Trethewey shares his appreciation for modern plumbing, then helps a homeowner with an all-electric heating system retrofit a radiant floor system under their bathroom; Nathan Gilbert shares connection options and maintenance for cable railings; Jenn Nawada shares changes to the USDA Plant Hardiness Zone map and how to use the information to select the best plants for a landscape.

Mauro Henrique shows a homeowner how to brighten up her basement apartment by painting with various paint concentrations; Richard Trethewey and Mark McCullough explain a variety of culprits and solutions for basements that are struggling with water issues; In Build It, Kevin O'Connor and Tom Silva show how to construct a bat house.

Watch Tom pull off a balancing act to repair an old window. Roger shows Kevin the future of lawn care with a robotic mower. Richard addresses concerns of lead...

Repairing a crack in a concrete retaining wall with a stucco finish; air compressors; installing a gas dryer.

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.

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.

Jenn creates a thoughtful backyard entrance; Mark shares how to safely clean hardscaping on different types of common hardscape materials; Tom shows how to patch holes in wood floors caused by previously removed radiators.

Killing weeds without hurting the lawn; restoring a historic fireplace built with custom bricks; thermostats; hanging a swing.

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.

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

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.

Lee Gilliam helps a homeowner improve the soil conditions of her garden bed before installing new plantings; a New Hampshire painter and business owner shares her journey in the trade; Heath Eastman helps a homeowner mitigate bathroom moisture by installing a remote bath vent and timer switch but runs into some trouble when he finds old wiring in the wall.

Ross Trethewey helps a homeowner install a smart thermostat after discovering he's missing a common wire; Mauro Henrique shares deck staining tips, what stain options are available, and the level of maintenance required for each type of stain; Mark McCullough helps a homeowner revive his bluestone patio by showing how to use the appropriate tools and materials to clean it.

A Detroit beekeeper talks about how to start a hive; phone apps that have made work easier; building a step stool using a mobile CNC router.

Replacing a concrete walkway with brick pavers; installing gas piping in a home; building a farmhouse table; guest Jimmy DiResta

Tom visits homeowners Roy and Sandra Lynn and shows them several products that are designed to keep leaves and other debris out of rain gutters. Then Tom, Richard, Roger and Steve examine two unfamiliar objects and try to guess how they're used. Richard then visits homeowners Steve and Maureen Parker and helps them repair their wobbly toilet. More Info & Resources

Lightning protection system; installing a reverse osmosis filter for drinking water.

Tom and Kevin team up to build a Little Free Library for an elementary school; Tom and his daughter, Kate, paint and decorate it to look like a school bus. Tom and Kevin meet up with students to help them install it and add their favorite books.

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.

Mauro Henrique shares the importance of prep work for any painting project, and why homeowners shouldn't skip it. Then, Mauro and Kevin O'Connor team up to refinish an antique outdoor bench with a whitewash stain; With a glass expert's help, Tom Silva learns how double pane glass is made while helping a homeowner repair a broken window.

The International Rose Test Garden; replacing damaged bathroom tiles; reviewing comments from viewers.

General contractor Tom Silva helps a homeowner install a new energy-efficient storm door. Then, up in the loft, plumbing and heating expert Richard Trethewey shows host Kevin O'Connor how to cut and solder copper plumbing pipes and fittings. Then, landscaping contractor Roger Cook helps a homeowner reduce the size of an overgrown privet hedge.

Replacing an undersized ceiling fan; bonsai nursery.

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.

A young fan learns how to build a tool box; installing smart smoke and carbon monoxide detectors; diagnosing a leaking safety valve and installing an expansion tank to fix it.

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.

Caring for prairie grasses; making a home more resistant to wildfires; a robotic solar array mimics a sunflower.

Sharpening a knife; re-staining a deck; building a fire; automatic water shutoff valves.

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.

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.