Every season of Ask This Old House ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Ask This Old House!

In the debut episode, Steve joined Richard, Roger and Tom in the Ask This Old House loft to give viewers a chance to ask questions and get expert advice about their homes. Tom shows Steve how to build a replacement window screen using inexpensive parts purchased from a home center. Roger demonstrates how an old barrel can be used to water a garden. Responding to a letter from a homeowner, Richard and Steve demonstrate how to fix and a leak in a 20-year-old dishwasher. Roger demonstrates the proper technique for sharpening lawn mower blades. Tom hits the road for the first House Call of the season, to a tall homeowner whose low ceiling threatens to knock him out on his way to the basement.

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Repairing a Window Screen; Saving the Rain; Looking for Headroom

At the Ask This Old House barn loft, Roger demonstrates different ways to mend a damaged garden hose. Richard shows the basic plumbing tools he recommends for homeowners. Tom explains how to use a square as a guide for cross-cutting with a circular saw. Tom then makes a House Call to homeowners struggling with a muddy lawn under the swings.

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Plumbing Toolkit; Park the Car Quietly; Safe Swinging

Tom visits homeowners in search of a modest way to hide an ugly back stoop. Back in the barn loft he shows the different adhesives and fasteners used, as well as more traditional types of decking. Steve and Roger demonstrate a new product that promises to rid backyards of mosquitoes. Richard shows the proper technique for installing a thermostat on an old radiator.

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Concrete Stoop Covering; Battling the Skeeters

Richard visits a homeowner and installs an air eliminator valve on her hydronic heating system, reducing the need for annual maintenance. At the Ask This Old House barn loft, Tom shows how to remove nails without damaging the trim on a door frame. Steve and Roger perform annual maintenance on a snow blower. Steve consults with Jim on ways to clean and maintain old paintbrushes. Tom makes a House Call to a young couple and shows them how to use sisal and jute rope to fill the gaps in their 160-year-old pine floor.

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Air Eliminator; Saving the Trim; Filling the Gaps

Tom and Steve demonstrate two types of floor sanders: a traditional drum sander. Roger and Steve use manual and power tools to dig post holes for a new fence. Richard travels to a historic district in Pittsburgh, Pennsylvania, to replace a corroded pipe on a viewer's boiler. Back in the loft, Tom gives Steve a lesson in proper caulking technique.

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Sanding Options; Digging Post Holes; Better Boiling

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.

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Ceiling Repair; Grinding the Stump; Shop Specs

Tom works with a homeowner to repair a sagging floor in a three-family house. Together, they jack up the failing beam, pour new concrete footings, and install several new lally columns. Back at the barn, Roger works with chainsaw expert Tim Ard to sharpen and maintain his saws.

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Jacking It Up; Chainsaw Smarts

In the workshop loft, Tom shows Steve how to cut wooden bung holes and install them in decking. Jim visits a viewer and shows her why the new paint in her bathroom is cracking and peeling. In the loft, Tom, Steve and Roger examine two unfamiliar objects and try to guess what they're used for. Tom makes a House Call and shows a young couple how to build an attractive outdoor lattice.

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Wooden Bung Holes; What Is It?; Lattice Project

Tom hits the road on a House Call to replace a rotting basement window and install a new dryer vent for a homeowner. Back in the Ask This Old House loft, Jim shows the proper technique for painting a pre-hung six-panel door. Electrician Allen Gallant visits homeowners and installs a new power outlet in their dining room, and Roger shows Steve how to replace the string on a weed trimmer.

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Basement Window; Painting Panels; Weed Trimmers

In the Ask This Old House loft, Richard and Steve take apart an old washing machine to determine why it's making a loud rumbling sound. Roger pays a visit to a homeowner and uses a pressure washer to clean off his slippery brick walkway. Back in the loft, Steve, Tom, Roger and Richard examine two unfamiliar objects and try to guess how they've used. Tom demonstrates different types of spirit levels, and Richard sets out to help a homeowner with a leaky kitchen faucet.

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Washer Repair; Pressure-Washed Brick; Drip-Free Faucet

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.

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Garden Pruners; Shutters; What Is It? A Tankless Job

In the loft, Tom shows different types of store-bought sawhorses and teaches Steve how to build a pair from scratch. Richard hits the road and installs a new frost-proof outdoor faucet for a homeowner. Back in the loft, Tom, Richard, Roger and Steve examine two unfamiliar objects and try to guess how they're used. Roger then shows Steve how to collect and compost leaves.

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Sawhorses; Frost-Free Faucet; What Is It? Composting Leaves

In the loft, Jim shows the several different types of paint sprayers and demonstrates the proper technique for using a spray painter to paint a shutter. Steve enlists the help of chimney expert Mark Schaub to replace a broken fireplace damper for a homeowner. Back in the loft, Steve, Tom, Roger and Richard examine two unfamiliar objects and try to guess how they're used. Steve and Roger head outside to demonstrate different ways to split logs for firewood.

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Spray-Painting; Chimney Dampers; What Is It?; Splitting Logs

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

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No More Scalding; Robotic Mowers; Critter-Proofing

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.

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Stubborn Ivy; What Is It?; Replacing a Bathroom Window

In the barn loft, Jim shows Steve the proper way to paint the exterior of a double-hung window. Roger helps homeowners Paul and Claire Blumenfeld aerate and fertilize their lawn. Then Roger, Steve, Tom and Richard examine two unfamiliar objects and try to guess how they're used. Tom then shows Steve different ways to hang a picture on a hollow wall.

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Aerating the Lawn; What Is It?; Hanging Pictures

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.

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Washer-Dryer Shutoff; What Is It? Drywall; Plumbing Torches

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.

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Gutter Protection; What Is It? Steadying the Toilet

Tom helps homeowner John Hill prevent drafts near his windows by installing insulation around the weight pockets. Then Tom, Richard, Roger and Steve examine two unfamiliar objects and try to guess how they're used. Richard makes a House Call to help homeowner John Johnstone install a sewage ejection pump for a new basement toilet.

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Insulating Windows; What Is It? Sewage Injection Pump

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.

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New Sill; What Is It? Rolling Paint; Sharpening Knives

Steve and Roger head outside to demonstrate different types of snow shovels and snow throwers. Back in the loft, Steve, Roger, Richard and Tom examine two unfamiliar objects and try to guess how they're used. Tom then visits homeowner Bernice Robinson and helps her repair the broken sash cords on an old window.

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Snow Removal; What Is It?; Fixing a Sash

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.

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Leaky Faucet; What Is It? Removing Wallpaper; Glue Guns

Tom installs crown molding with homeowners Sheila and Karen Fitzpatrick. Back in the loft, Tom, Richard, Roger and Steve examine two unfamiliar objects and try to guess how they're used. Then Richard helps a Chicago-area homeowner install insulation to prevent his bathroom pipes from freezing.

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Crown Molding; What Is It?; Keeping Out the Cold

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.

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Kitchen Disposer; What Is It?; Hearing Protection

Tom helps Chicago-area homeowners Daryl and Catherine Katauskas repair their exterior door jamb by installing a dutchman. Back in the loft, Tom, Richard, Roger and Steve examine two unfamiliar objects and try to guess how they're used. Then Richard prevents a basement from flooding by installing a leak sensor and automatic water shutoff valve on a water heater.

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The Dutchman; What Is It?; Flood Prevention

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.

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Clearing a Toilet; What Is It? Attic Access; Tomatoes

Installing a deadbolt; trimming hedges; fixing a heating system.

Deadbolt Installation; Hedge Trimming; Hot Water Heater

Securing a shaky newel post at the top of a stairway; replacing a 50-year-old water heater.

Newel Renewal; What Is It? Replacing a Water Heater

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

Slate Walkway; What Is It? Shower Stall Leak

Repairing holes in drywall; replacing a large 1920s wall-mounted toilet.

Fixing a Hole; What Is It? 14-Inch Rough-in Toilet

Installing a backyard drywell; installing a bathtub safety grab bar.

Drywell Installation; What Is It? Getting a Grip

Installing interior window trim; hiding utility boxes in front of a house; fixing a broken spray hose on a kitchen faucet.

Window Trimming; Utility Boxes; What Is It? Kitchen Faucet

Replacing ailing grass with ivy and pachysandra; opening double-hung windows that are painted shut.

Groundcover Planting; Opening Stuck Windows

Replacing wall-to-wall carpeting with pre-finished hardwood flooring; pros and cons of floors; replacing a rusty bathroom sink stopper.

Prefinished Engineered Floor; Replacing a Sink Stopper

Removing poison ivy from the yard without using herbicides; weaving cedar shingles on an outside corner of a house.

Poison Ivy Removal; What Is It? Installing a Shingles Corner

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

Chimney Liner; What Is It? Toilet Tank Condensation

Installing a staircase handrail; transplanting a rhododendron.

Stairway Handrail; What Is It? Transplanting a Rhododendron

Repairing an irrigation system; fixing a bathtub leak.

Drip Irrigation Repair; What Is It? Leaky Tile Tub

Silencing squeaky hardwood floors; building a set of timber stairs.

Squeaky Hardwood Floors; What Is It? Building Timber Stairs

Brick-walk installation; cutting a miter in wood trim.

Walkway Installation; What Is It? Cutting Accurate Miters

Fixing sliding closet doors; electric radiant floor heat; selecting exterior paint colors.

Sliding Closet Doors; What Is It? Electric Heat; Paint Colors

Examining water quality; installing a water softener and filter; replacing a rotten board in hardwood flooring.

Water Quality Testing; What Is It? Damaged Floorboard

Snaking wire through exterior walls; planting a magnolia tree.

Snaking Speaker Wire; What Is It? Planting a Tree

Protecting shrubs from deer; pipe connections; fixing a shower door that will not close properly.

Deterring Deer; PVC Pipe; What Is It? Sagging Shower Door

Cutting a pane of glass; planting climbing vines; installing a portable air conditioner.

Cutting Glass; Climbing Vines; What Is It? Portable Aircon

Programmable thermostat installation; repairing a cracked plaster and lath wall.

Programmable Thermostat; What Is It? Plaster and Lath Wall

Air vent replacement; repairing a steam radiator's shut-off valve; preparing garden beds for winter.

Steam Radiator; What Is It? Preparing Raised Garden Beds

Installing a curved basecap molding in a stairwell; purchasing electrical wire by the foot; collecting sap and making maple syrup.

Curved Molding; Buying Wire Foot; What Is It? Maple Syrup

Radiant Heat; What Is It? Prep Aluminum Siding for Paint

Installing track lighting in the kitchen; how to quiet noisy baseboard heaters.

Track Light; Drywall Repair Clips; Noisy Baseboard Heaters

Corroded copper pipes; how to replace worn-out weather stripping around a kitchen door.

Copper Pipe Corrosion; What Is It? Stripping a Drafty Door

Repairing a damaged door jamb and installing a new storm door; choosing the right garden tools for spring cleanup.

Door Jamb and Storm Door; What Is It? Garden Tools

Our first House call of the season takes us to Beverly, Massachusetts, where Roger shows new homeowners Todd and Chrissy Fratzel the proper way to edge a lawn and flower bed. Back in the loft, Tom gives some lessons on choosing drill bits. Then the guys ask ""What Is It?"" Finally, Kevin visits Captain Hugh Duffy at the Boston Fire Department Training Center for some lessons on choosing the right type of fire extinguisher.

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Edging a Lawn; Selecting Drill Bits; What Is It?; Fighting Fire

Richard makes a House call in Wellesley, Massachusetts, to help homeowner Ziad Tarawneh replace a trap under his bathroom sink. Back in the loft, Roger shows Kevin a few design options for laying out a brick walkway. Then Tom shows homeowners Rudd Coffey and Melissa Liazos of Watertown, Massachusetts, how to make their cracked plaster ceiling look like new by covering it with drywall.

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Clogged Trap; Brick Walkway Patterns; Fixing Ceiling Cracks

Roger repairs a broken fence with teenage neighbor Amanda Rao. Back inside, the guys ask, ""What Is It?"" Then, Richard restores hot-water flow to a shower for a house-sitter by repairing an anti-scald shower valve. Back in the loft, Tom shows how to upgrade an old drill by installing a ""keyless"" chuck.

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Broken Fence; What Is It? Shower Valve; Keyless Chuck

Tom visits homeowners David and Patti Dobrindt in Milton, Massachusetts, to help them cut a pass-through in their kitchen wall. Back in the loft, the guys ask, ""What Is It?"" After that, Rich repairs a continuously running toilet in West Roxbury, Massachusetts, for homeowner Peter Fay.

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Pass-Through Opening; What Is It? Stopping a Running Toilet

Tom shows Kevin how to remove bolts and screws with stripped or damaged heads. Roger visits homeowner Lauren Speisman of Waltham, Massachusetts, to help create an edge along a concrete walkway using jumbo cobblestones. Back in the loft, Tom, Roger, Kevin and Richard ask, ""What Is It?"" as they identify unknown objects. Then Tom heads to Wenham, Massachusetts, to help homeowner Francine Molay jack up the roof of her front porch and fix a rotting post.

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Screw Extractors; Cobblestone Edging; Rotting Porch Post

Tom helps spruce up the front of homeowner Stacy Keller's Acton, Massachusetts, house by building window boxes for flowers. Then Tom, Roger, Richard and Kevin ask, ""What Is It?"" Then Roger installs sod to create a brad-new lawn in the backyard of Needham, Massachusetts, homeowner Peter Burdick, just in time for his family's annual barbecue.

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Flower Boxes; What Is It? New Lawn with Sod

In the workshop loft, Richard demonstrates how to extend the life of a hot water heater by replacing the sacrificial anode rod. Tom visits homeowner Alison Hardy of Topsfield, Massachusetts, and installs a ""cricket,"" or rain diverter, to keep water away from her front steps. Then Richard, Tom, Roger and Kevin ask, ""What Is It"" Then it's off to Brighton, Massachusetts, where Richard helps homeowner Kim McMahon cool off by installing thermostatic valves on her stream radiators.

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Anode Rod Replacement; Water Diverter; Too Much Heat!

Tom helps homeowners Rich and Sarah Paisner of Brighton, Massachusetts, get organized by installing adjustable shelves on the wall in their den. Back in the loft, Tom, Richard, Roger and Kevin ask, ""What Is It?"" Then Roger is joined by soil expert Roberta Clark from the University of Massachusetts for some tips on testing soil before planting. Then Richard gets Tewksbury, Massachusetts, homeowner Paige Impink into hot water by installing a hot water recirculator pump in her upstairs bathroom.

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Hanging Shelves; Soil Testing; Hot Water Recirculator

Inside the loft, Richard gives Kevin some lessons on leaky valves and how to repair them. Then, Tom heads to Waltham, Massachusetts to help homeowners David Anderson and Alica Beneteau replace an old, rusty cellar door with a new fiberglass model. Back in the loft, Tom, Richard, Roger and Kevin ask, ""What Is It?"" Then, Roger helps homeowner Christine Dinardo of Carlisle, Massachusetts repair a leaky drip irrigation hose.

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Plumbing Valves; Old Bulkhead; Drip Irrigation Repair

Richard visits Stephen Davidson of Littleton, Massachusetts to find the source of a strange ""fog horn"" sound coming from his plumbing system. Then Richard, Tom, Roger and Kevin ask, ""What Is It?"" Back in the loft, Tom shows the three basic cuts necessary to install crown molding. And tile contractor Joe Ferrante helps homeowner Brandon Ingersoll of Cambridge, Massachusetts replace some hard-to-find broken bathroom tiles.

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Noisy Toilet; What Is It? Cutting Crown Molding; Broken Tile

Kevin heads outside the barn to learn about ladder safety from expert John Drengenberg. Up at the loft, Kevin, Tom, Richard and Roger ask, ""What Is It?"" Then, Roger rebuilds a crumbling retaining wall with homeowner Colin White of Wakefield, Massachusetts using interlocking concrete blocks.

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Ladder Safety; What Is It? Replacing an Old Retaining Wall

Tom heads to sunny Los Angeles, California where he helps homeowner Joshua Tano repair some cracked stucco. Back in the loft, Tom, Richard, Roger and Kevin ask, ""What Is It?"" Then, Roger shows Kevin how to keep a lawnmower humming all summer long by cleaning underneath the deck. Then, Richard helps water-logged homeowner Karen Kostegan of Bedford, Massachusetts install a pump to remove condensate from her basement dehumidifier.

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Cracked Stucco; Cleaning a Lawnmower; Dehumidifier Pumps

Roger re-seeds a damaged lawn for homeowner Mary Brintnall of Beverly, Massachusetts. Back in the loft, Roger, Tom, Richard and Kevin ask, ""What Is It?"" Then, Richard heads to Detroit suburb of Sterling Heights, Michigan to install a new kitchen sink for homeowners Donna and Tim Mackey.

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Planting a New Lawn; What Is It? Replacing a Kitchen Sink

Tom heads to the windy city suburb of Park Ridge, Illinois, where he helps homeowner Richard Westphal replace the broken window pane in an exterior door. Back in the loft, Tom and glass expert Larry Rosenfield show Kevin different kinds of safety glass. Afterwards, Tom, Kevin, Richard and Roger ask, ""What Is It?"" Then Roger is off to Brookline, Massachusetts to ""let the sunshine in"" for homeowner Elizabeth Choi by pruning her Pin Oak tree with the help of arborist Matt Foti.

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Chicago Door Glass; Glass Expert; Pruning a Pin Oak

Tom helps homeowner Tarah Hirschey of Wellesley, Massachusetts make her old windows more efficient by installing new storm windows. Then, Roger offers tips for getting your shrubs ready for winter. Afterwards, Tom, Roger, Richard and Kevin ask, ""What Is It?"" in the Ask This Old House loft. Finally, Roger heads to New York City where he meets up with home inspector Stephen Gladstone and homeowners Roy and Sophia Pachecano for some potentially life-saving lessons on carbon monoxide detectors.

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Old Storm Window; Shrubs; Carbon Monoxide Detectors

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.

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Replicating Moldings; Unlevel Patio; Stripping Wallpaper

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.

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Rotted Deck Balusters; What Is It? Connecting an Icemaker

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.

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Unclogging Drains; Window Weights; Low-Maintenance Garden

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.

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Composting; What Is It? Removing a House Trap

Tom helps homeowner Mark Andrews of Charleston, Massachusetts level an uneven concrete floor so that he can install hardwood flooring. Then Tom, Richard, Roger and Kevin ask, ""What Is It?"" in the Ask This Old House loft. Then, Richard shows homeowner Jenna Williams of Rex, Georgia a simple repair for a leaky water shut-off valve. Then, up in the loft, Tom teaches Kevin about air-compressors and how to select the right one for the job.

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Floor Leveling; What Is It? Leaky Water Valve; Air Compressors

Tom shows Kevin what's inside a typical residential electrical service panel. Then, master electrician Allen Gallant helps homeowner Steve Bankowitz of Burlington, Massachusetts install a 220-volt receptacle in his garage-turned-woodshop. Roger shows Kevin what types of hand tools every home gardener should own. Then, the crew ask, ""Whats Is It?"" in the Ask This Old House loft. Later, Richard helps homeowner Scott Jones of Arlington, Massachusetts install a macerating toilet in his basement.

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220-Volt Receptacle; Gardening Hand Tools; Macerating Toilet

Roger heads to Alpharetta, Georgia to help homeowner Dale Eneberg shop for a new riding lawnmower. Then Roger, Richard, Tom and Kevin ask, ""What Is It?"" Later, Tom replaces a rotting wooden threshold for homeowners Steve Chapman and Maggie Hale of Arlington, Massachusetts. And, back in the loft, Richard shows Kevin how garbage disposers work and explains how to keep them working like new.

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Riding Lawnmowers; Garbage Disposers; Rotting Threshold

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.

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Clogged Vent Stack; What Is It? Backyard Ice Rink

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.

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Air Cleaner; Walkway Ice Removal; Bathroom Venting

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.

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Florescent Light; Landscaping Software; Aluminum Heat Cover

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.

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Window Boxes; What Is It? Plumbing Connections

Our 4th season begins with a house call from landscaping contractor Roger Cook who helps a homeowner repair a loose flagstone in his mortared front walkway. Then Roger, along with general contractor Tom Silva, plumbing and heating expert Richard Trethewey, and host Kevin O'Connor ask, "What is it?" Then, Tom helps a handy homeowner patch a hardwood floor where an interior wall once stood.

Mortared Stone Walkway Repair; Patching an Oak Floor

General contractor Tom Silva quiets a homeowner's squeaky stairs and replaces a broken baluster. Then Tom, along with plumbing and heating expert Richard Trethewey, landscaping contractor Roger Cook, and host Kevin O'Connor ask, "What is it?" Then, Richard helps a homeowner prevent a damaging flood by installing an automatic shut-off valve for her washing machine.

Creaky Stairs; Static Cling Solution; Electric Shut-Off Valve

Plumbing and heating expert Richard Trethewey helps a homeowner improve the quality of her drinking water by installing an under-sink filter. After that, Richard and host Kevin O'Connor are joined in the loft by water-filtration expert Bill McTighe who explains several other types of residential water filters. Then, landscaping contractor Roger Cook helps a homeowner select a drought-resistant tree and plant it properly in her sloped front yard.

Under-Sink Water Filter; Planting a Drought Resistant Tree

Up in the loft, landscaping contractor Roger Cook shows host Kevin O'Connor how to repair a flat wheelbarrow tire. He also shows a new type of flat-free tire. Then, general contractor Tom Silva helps a homeowner repair an aluminum rain gutter. Then, back in the loft, Kevin and Tom demonstrate a tip sent in from a viewer on how to drill a hole in ceramic tile. Then, plumbing and heating expert Richard Trethewey helps a homeowner with a leaking T&P valve on his water heater by installing a thermal expansion tank.

Flat Tire; Aluminum Rain Gutter; Thermal Expansion Tank

Landscaping contractor Roger Cook heads to Grandview, Missouri to help a homeowner care for an ailing rose bush. Then Roger, along with general contractor Tom Silva, plumbing and heating expert Richard Trethewey, and host Kevin O'Connor ask, "What is it?" Up in the loft, Richard shows Kevin a number of ways to steady a wobbly toilet. Then, Tom helps a homeowner prevent water from leaking through a hole in his foundation into his basement.

Rose Bushes; Wobbly Toilet; Water Leak; Hydraulic Cement

Landscaping contractor Roger Cook helps a young couple build a raised garden bed using composite landscape timbers made from recycled plastic and sawdust. Back in the loft, Roger shows host Kevin O'Connor several other types of landscape timbers, including one that has been pressure-treated with liquid glass. Then, plumbing and heating expert Richard Trethewey helps a homeowner clear a slow-draining bathtub using a plumbing snake.

Raised Garden Bed with Timbers; Clearing a Bathtub Drain

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.

Moss, Algae and Lichen; Leaky Water Valve; Planting Shade

Up in the loft, general contractor Tom Silva gives host Kevin O'Connor a few lessons on the proper use of a circular saw. Then, plumbing and heating expert Richard Trethewey installs a new outdoor faucet for a homeowner using flexible plastic tubing called PEX. Then Richard, along with Tom, Kevin and landscaping contractor Roger Cook ask, "What is it?" And arborist Matt Foti prevents a tree from splitting in half by installing steel cables and through-bolts to hold it together.

Circular Saw 101; Outdoor PEX Faucet; Cabling an Oak Tree

Plumbing and heating expert Richard Trethewey starts the show with a suggestion sent in by a viewer. Richard shows how to use a common wire nut to save a partially-used tube of caulk and demonstrates a new replacement caulk tip. Then, general contractor Tom Silva helps a pair of homeowners replace the worn-out roof on an old garage. Together, they tear off the old roof, lay down felt paper, and re-shingle the roof using new asphalt-fiberglass shingles.

Garage Roof Re-Shingling with Asphalt; Fiberglass Shingles

Landscaping contractor Roger Cook helps a pair of homeowners tame an overgrown privet hedge with some "rejuvenation pruning." Then, plumbing and heating expert Richard Trethewey helps a homeowner install a laundry sink in the basement of her new townhouse. Together, they run the copper pipes for the water supply, make the new PVC drain connection, and connect the plumbing vent.

Pruning an Overgrown Privet Hedge; New Laundry Sink

Landscaping contractor Roger Cook and host Kevin O'Connor bundle up and head outside for a few lessons on the different types of snowthrowers and how to use them properly. Back in the barn loft, Roger and Kevin, along with plumbing and heating expert Richard Trethewey and general contractor Tom Silva ask, "What is it?" Then, Tom makes a housecall to help a homeowner replace an old, drafty exterior door with a new pre-hung, energy-efficient unit.

Snowthrowers; What Is It? Installing A New Exterior Door

Host Kevin O'Connor heads to southern California and meets with a local expert to learn about the proper tools techniques for window washing. Then back in the loft, Kevin, along with landscaping contractor Roger Cook, plumbing and heating expert Richard Trethewey, and general contractor Tom Silva ask, "What is it?" Then, Richard helps a pair of homeowners flush the sediment out of their aging electric water heater. Later, up in the loft, Richard demonstrates several water heater maintenance tips.

Washing Windows; What Is It? Flushing an Electric Water Heater

General contractor Tom Silva heads to New York's "lower east side" to help a pair of apartment-dwellers install a new vinyl floor. Then Tom, along with plumbing and heating expert Richard Trethewey, landscaping contractor Roger Cook and host Kevin O'Connor ask, "What is it?" Then, up in the loft, Richard shows Kevin a few ways to prevent plumbing pipes from freezing in the winter and the proper way to thaw pipes if they do freeze.

New Vinyl Floor; What Is It? Preventing Frozen Pipes

Host Kevin O'Connor heads to Minneapolis, Minnesota to help a pair of homeowners who have discovered dangerous levels of radon gas in their finished basement. Then, up in the loft, Kevin shows a number of radon test kits available at home centers and local health departments. Then, landscaping contractor Roger Cook shows a homeowner how to prune his apple tree to produce healthy fruit.

Radon Mitigation System; Pruning an Apple Tree

Landscaping contractor Roger Cook heads to Dallas, Texas to help a homeowner install a low cost in-ground sprinkler system. Then Roger, along with plumbing and heating expert Richard Trethewey, general contractor Tom Silva, and host Kevin O'Connor ask, "What is it?" Then, Tom helps a homeowner pour new concrete footings for a backyard deck.

In-Ground Sprinkler System; Pouring a Concrete Footing

Up in the loft, general contractor Tom Silva shows host Kevin O'Connor several different types of hammers and how to use them properly. Then, plumbing and heating expert Richard Trethewey helps a homeowner repair a pressure-assisted toilet. Tom then gives Kevin some lessons on how to patch a large hole in a wall using veneer plaster and blueboard.

Choosing Hammers; Pressure-Assisted Toilet; Plastered Wall

Plumbing and heating expert Richard Trethewey and a specialist repair a residential well system for a homeowner by replacing the pump and pressurized well tank. Then general contractor Tom Silva helps a homeowner repair a small hole in his vinyl siding.

Residential Well Repair; Repairing a Hole in Vinyl Siding

Landscaping contractor Roger Cook shows a homeowner how to transplant a spruce tree that was originally planted too close to her house. Then Roger, along with plumbing and heating expert Richard Trethewey, general contractor Tom Silva, and host Kevin O'Connor ask, "What is it?" Then, Tom heads off to Seattle to help a homeowner extend a staircase handrail using a new type of fastening system.

Transplanting a White Spruce; Extending a Staircase Handrail

General contractor Tom Silva shows host Kevin O'Connor how to build a custom cover for a radiator. Then plumbing and heating expert Richard Trethewey shows Kevin several different types of humidifiers and then makes a housecall to help a homeowner install a steam humidifier on her forced-air heating system.

Custom Radiator Cover; Installing a Steam Humidifier

Landscaping contractor Roger Cook and a specialist help a homeowner install a granite driveway marker so that visitors can more easily find his house. Then Roger, along with plumbing and heating expert Richard Trethewey, general contractor Tom Silva, and host Kevin O'Connor ask, "What is it?" Afterward, Richard heads to Pennsylvania to fix a hot water radiator that is not providing any heat.

Granite Driveway Marker; Hot Water Radiator System

This special episode is all about making your home more energy-efficient. Plumbing and heating expert Richard Trethewey heads to Atlanta where he helps a homeowner install an instantaneous water heater to save on rising fuel costs. Then, up in the loft, landscaping contractor Roger Cook shows how proper planting of deciduous and evergreen trees can help reduce the costs of heating and cooling your house. Then, general contractor Tom Silva helps a pair of homeowners insulate the walls of their antique Victorian using blown-in cellulose insulation. Back in the loft, Tom demonstrates how to add additional fiberglass insulation to an attic.

Water Heater; Planting Trees to Save Energy; Cellulose Insulation

Up in the loft, plumbing and heating expert Richard Trethewey shows host Kevin O'Connor how to repair damaged threads on a radiator using a drill and "tap." Then, landscaping contractor Roger Cook helps a homeowner solve a grading problem that is causing wood rot on the side of her house. Then Richard and Kevin, along with general contractor Tom Silva and host Kevin O'Connor ask, "What is it?" Afterward, Tom shows Kevin how to stabilize a wobbly newel post. Then, Kevin and a tub refinisher help a homeowner refinish her old cast-iron bathtub and make it look like new.

Cast-Iron Radiator and Bathtub; Grading; Wobbly Newel Post

The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a virtual truckload of questions on smaller projects, and the This Old House crew is ready to answer. Ask This Old House solves the steady stream of home improvement problems faced by viewers - and the crew even makes house calls!

The Best Seasons of Ask This Old House

The Best Seasons of Ask This Old House

Season 1

Season 2

Season 3

Season 4

Season 5

Season 6

Season 7

Season 8

Season 9

Season 10

Season 11

Season 12

Season 13

Season 14

Season 15

Season 16

Season 17

Season 18

Season 19

Season 20

Season 21

Season 22

Season 23