Planting an indoor tropical garden with plants from Jamaica; changing the temperature on water heaters; building an American flag out of wood.

Replacing a shower valve; repairing damage to a baseboard; keeping a lawn mower in excellent shape.

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

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.

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.

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.

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.

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.

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.

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.

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

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.

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

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.

Building mudroom cubbies; different types of mulch; painting the mudroom cubbies using a paint sprayer.

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.

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.

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.

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.

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.

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.

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

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.

Roger Cook helps a homeowner replace a mailbox that had been damaged by snowplows. Tom Silva travels to St. Louis to help a a young couple repoint the failing mortar on the brick foundation of their home.

Richard Trethewey assists a homeowner install a new bathroom radiator that will double as a towel warmer. In the Ask This Old House loft, Tom Silva shows Kevin O’Connor how to shape wood by using hand planes. Roger Cook helps a homeowner remove crabgrass from his lawn and prevent it from returning.

Richard assists a homeowner in replacing a corroded shut-off valve with a new one without using soldering. In the Ask This Old House loft, Tom, Richard, Roger and Kevin examine an unfamiliar object and try to guess how it is used. Then Roger helps a homeowner with her rose bushes so they will climb a two-rail fence.

General contractor Tom Silva removes the cracked and warped boards on an old deck and installs new composite decking using hidden fasteners. Afterward, plumbing and heating expert Richard Trethewey quiets down a noisy steam heating system

Landscape contractor Roger Cook shows a homeowner how the brick stairs in front of his house have created a blistering "micro-climate," causing damage to an adjacent shrub. Together, they remove the ailing shrub and replace it with a heat-tolerant yew. Then Roger, along with host Kevin O'Connor, general contractor Tom Silva, and plumbing and heating expert Richard Trethewey ask, "What is it?" Afterward, Tom improves the ventilation in an attic by installing a solar-powered roof fan

Tom travels to Sacramento to help homeowners repair a damaged section in the vinyl flooring in their kitchen. In the Ask This Old House loft, Tom, Richard, Roger and Kevin examine an unfamiliar object and try to guess how it is used. Then Roger goes to Las Vegas to help a homeowner repair his leaking in-ground sprinkler system.

Kevin O'Connor helps a homeowner select wall-to-wall carpet and install it properly with the assistance of a professional installer. Back in the Ask This Old House loft, Kevin, Tom Silva, Richard Trethewey, and Roger Cook examine an unfamiliar object and try to guess how it is used. Then Tom teaches Kevin a few important lessons for using a tablesaw safely. He demonstrates a new type of emergency brake that helps to prevent tablesaw injuries.

Landscaping contractor Roger Cook heads to Denver to help a pair of homeowners remove an overgrown Juniper bush. Then, up in the loft, host Kevin O'Connor and general contractor Tom Silva demonstrate the proper way to coil extension cords. Then, plumbing and heating expert Richard Trethewey helps a homeowner replace a pop-up drain assembly on the pedestal sink in his bathroom.

Up in the loft, plumbing and heating expert Richard Trethewey shows host Kevin O'Connor different methods for clearing clogged drains. Then Richard and Kevin, along with landscaping contractor Roger Cook and general contractor Tom Silva ask, "What is it?" Afterward, Tom helps a homeowner install new kitchen cabinets.

Landscaping contractor Roger Cook and arborist Matt Foti help a homeowner properly prune his overgrown willow tree. Then, plumbing and heating expert Richard Trethewey heads to Denver to fix a hot water heating system that doesn't provide enough heat to a newly-built addition.

Landscaping contractor Roger Cook takes a homeowner shopping for mulch and shows her how to re-mulch and edge her garden beds. Then, general contractor Tom Silva shows a homeowner how to replace broken sash balancers in his double-hung windows.

Plumbing and heating expert Richard Trethewey heads to San Francisco to help a homeowner repair an old shower mixing valve. Then Richard, along with host Kevin O'Connor, landscaping contractor Roger Cook, and general contractor Tom Silva ask, "What is it?" Then, up in the loft, Kevin and Tom are joined by battery expert Tim Pugh to discuss battery technology in cordless tools and proper recycling of batteries.

Up in the loft, stone countertop expert Jason Keefe shows host Kevin O'Connor how to maintain stone countertops and prevent stains. Then Kevin, along with landscaping contractor Roger Cook, plumbing and heating expert Richard Trethewey, and general contractor Tom Silva ask, "What is it?" Afterward, Roger and fence contractor Mike McLaughlin help a homeowner install a chain link fence.

Host Kevin O'Connor and energy efficiency expert Bruce Torrey conduct an energy audit of a house. Using an infra-red camera, they locate areas where weather-stripping and insulation can be improved. Then Kevin, along with plumbing and heating expert Richard Trethewey, landscaping contractor Roger Cook, and general contractor Tom Silva ask, "What is it?" Afterward, Richard demonstrates how to remove an old toilet seat that has corroded bolts.

Landscaping contractor Roger Cook and host Kevin O'Connor plant flower bulbs outside the barn. Then, up in the loft, general contractor Tom Silva shows Kevin how to makes straight rip cuts with a circular saw using a customized jig. Then Tom, Kevin, Roger and plumbing and heating expert Richard Trethewey ask, "What is it?" Afterward, Richard helps a homeowner eliminate the water hammer noise from his pipes by installing shock suppressors.

General contractor Tom Silva heads to Las Vegas to help a young homeowner organize her garage by installing new cabinets designed especially for garages. Then, in the "What is it?" segment, host Kevin O'Connor and landscaper Roger Cook test a new type of vacuum-assisted post hole digger. Afterward, electrician John Barros visits a homeowner who needs help installing a new ceiling fan. Then, up in the loft, John shows Kevin a few other ways of installing fan-rated electrical boxes.

Plumbing and heating expert Richard Trethewey helps a homeowner begin to remodel his bathroom by installing a new acrylic shower base. Back in the loft, Tom demonstrates the proper way to install backerboard and tile around a new shower base. Then, landscaping contractor Roger Cook helps a homeowner save water by installing a rain barrel to catch rainwater from the roof.

Plumbing and heating expert Richard Trethewey helps a homeowner replace a clogged aerator on his bathroom faucet. Then, up in the loft, landscaping contractor Roger Cook is joined by plant expert Carrie Kelly to learn about caring for houseplants. Then, general contractor Tom Silva helps a homeowner quiet a squeaky subfloor hidden underneath wall-to-wall carpeting using special "breakaway" screws.

Our 5th season kicks off with general contractor Tom Silva helping a homeowner repair an interior door that won't latch shut. Then Tom, along with landscaping contractor Roger Cook, plumbing and heating expert Richard Trethewey and host Kevin O'Connor ask, "What is it?" Then, Roger heads for "fabulous" Las Vegas, Nevada, where he helps a pair of homeowners select and plant a privacy screen using bamboo plants.

In this special episode devoted to projects for kids, plumbing and heating expert Richard Trethewey shows two kids how to build a soccer goal using PVC plumbing pipes. Next, up in the loft, general contractor Tom Silva demonstrates how to build a pair of stilts. Then, landscape contractor Roger Cook shows a family how to build a sandbox and make replicas of fossils.

Nathan upgrades a bathroom by replacing vintage wall-mounted ceramic toothbrush and soap holders. The team plays "What Is It?" to guess the purpose of a metal bar. Mauro repairs a water-damaged ceiling crack matching the original swirl texture.

Nathan builds a display case to store his grandfather's U.S. flag; Heath replaces a circuit breaker; the team shares the ways their trades were affected by the COVID-19 pandemic.

Restoring a slate walkway; repairing a leak in a fiberglass shower stall.

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.

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.

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

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.

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

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, 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.

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.

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.

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.

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 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.