Season 20

01 Two-Prong Outlet; Deck Stair Rail Episode 130th September 2021 Richard discusses pipe soldering; Heath explains what two-prong receptacles are, why they're no longer to code, and how to replace them; Nathan and Mauro build, install, and paint deck stair railings. 02 Durable Landscape; Cutting Board Episode 27th October 2021 Jenn creates a landscape that can withstand heavy pedestrian traffic; Richard explains the options available for water heaters; Tom and Kevin build a cutting board out of walnut, cherry, and maple. 03 Hole Patches; Threshold Repair Episode 314th October 2021 Jenn discusses creative options for ground cover plants; Tom demonstrates different techniques for patching wall holes; Mark demonstrates how to patch brick holes; Nathan installs a new threshold. 04 Wood Floors, DIY Ice Rink Episode 421st October 2021 Mauro demonstrates how to remove dried paint from a paintbrush; Tom shares the best techniques for connecting and installing tongue and groove flooring; Jenn and Nathan build a DIY ice rink. 05 Smart Doorbells, Recessed Lights Episode 528th October 2021 Ross discusses the pros and cons of smart doorbells; Mauro demonstrates techniques for painting wood paneling; Heath shares some of his most-used tools and helps a homeowner install recessed lights. 06 Easier Plumbing, Roofing 101 Episode 64th November 2021 Mark explains how bricks are made and how many different varieties there are; Richard explains how solderless connections work; Tom assess and reshingles a shed roof with asphalt shingles. 07 Fall Garden Tips, Paint Cabinets Episode 711th November 2021 Jenn shares her list of must have gardening tools and how to put a garden to bed before winter; Mauro demonstrates how to paint a kitchen cabinet; Nathan installs exterior front door trim. 08 An AskTOH Barn Raising Episode 818th November 2021 The entire team comes together to help Mark rebuild the chicken barn he lost to a fire. They reframe the barn, hook up new electrical wiring, connect a utility sink, and hang an exterior door. 09 Drill Drivers, Patios Expansion Episode 925th November 2021 In Tool Lab, tool expert Chris Ermides demonstrates how tables saw blades work; Heath explains why and how to use a voltage tester; Mark helps a homeowner extend her existing patio. 10 Camilla's Workshop Episode 1016th December 2021 General contractor and expert woodworker Tom Silva meets past guest and young woodworker Camilla in her dad's shop where they catch up since they last met. After checking out some of Camilla's work, the two discuss her need for a workspace of her own. With a worktable in mind, Tom invites her back to the workshop to help with the special project, a birdhouse. 11 Holiday Projects Episode 1123rd December 2021 Jenn explains how to identify and care for holly plants; Richard explains how dishwashers work and how to troubleshoot them when they don't drain properly; Tom and Kevin turn Christmas ornaments. 12 Wifi Extension, Tub Drain Episode 1230th December 2021 In Tool Lab, Nathan explains what different table saw blade types are used for; Ross extends WiFi service in a house; Richard replaces a faulty tub drain; the team shares their New Years' Resolutions. 13 Rot Repair, Heat Pumps Episode 136th January 2022 Mark shares the story of how he became a mason; Tom explains why wood rots on houses, how to prevent it, and how to repair it if it occurs; Ross explores heat pump technology. 14 Patch Plaster, Sinking Drywell Episode 1413th January 2022 Heath explains why finish electrical work is his favorite stage of the job; Mauro demonstrates how to repair a crack in plaster; Mark raises a drywell in a driveway that is sinking below grade. 15 Celebrating 20 Years Episode 1520th January 2022 The entire cast reflects on the 20th anniversary of ASK THIS OLD HOUSE. They'll discuss how the show was made and what they think the legacy of the television program will be moving forward. 16 Vinyl Floor, Heating Bill Savings Episode 1627th January 2022 Jenn shares the story of how she became a landscape designer; Richard and Ross explain cost-effective ways to save money on your heating bill this winter; Nathan helps a homeowner replace a vinyl kitchen floor. 17 Water Fountain, Supply Chains Episode 173rd February 2022 Jenn and Mark show how to make a stone water fountain for your garden; In Tool Lab, Nathan breaks down Miter Saw blades; The team comes together to discuss the challenges they've faced dealing with ongoing supply chain issues. 18 Porch Base Column Repair, Smart Thermostats Episode 1810th February 2022 Richard shares how he became a plumber and what he loves about his trade; Ross talks about smart thermostats and their features; Heath explains how to understand switch legs; Tom replaces an old, rotted porch column base. 19 Shrub Harvesting, Building A Box Joint Jig Episode 1917th February 2022 Jenn visits a nursery to learn how shrubs are planted and harvested; Ross and Nathan show cost-effective ways to air-seal your windows this winter; Tom demonstrates how to build a serving tray using a box joint jig. 20 Concrete Driveway, Spray Paint Episode 2024th February 2022 Nathan gives a tour of his highly organized truck; Richard shows different kinds of bidets and their functions; Mauro explains how to use spray paint for small home projects; Mark replaces an old, patched driveway with a new concrete one. 21 Front Hall Closet, Block Retaining Wall Episode 2117th March 2022 Jenn Nawada explains how you can compost at home; Jenn Largesse and her landscape contractor install a concrete block retaining wall in Jenn's backyard; Tom constructs custom built-in drawers, cubbies and shelves for a front hall closet. 22 Fireplace Repairs, Simple Clog Fixes Episode 2224th March 2022 Heath breaks down the basic voltages of cordless tools; Richard gives an overview on how to handle simple clogs in a bathroom sink, kitchen sink and toilet; Mark repairs a fireplace and replaces its cover. 23 Window Flower Boxes, Smart Electrical Panels Episode 2331st March 2022 Tom shares how he became a general contractor and what he loves about his trade; Heath and Ross explain what smart electric panels are and how they work; Jenn and Nathan build and fill new window flower boxes. 24 Sagging Fence Gate, Shipping Container Pool Episode 247th April 2022 Nathan demonstrates different ways to fix scratches on wood furniture; Jenn Largesse oversees the installation of a shipping container pool in her backyard; Tom shows how to fix and resecure a sagging fence gate. 25 Wobbly Toilet, Led Lightbulbs Episode 2514th April 2022 Nathan shares how he became a carpenter and what he loves about his trade; Heath talks all about different LED light bulbs; Richard fixes a wobbly toilet and repairs a sticky faucet handle. 26 Vinyl Fence, Building A Beehive Episode 2621st April 2022 Jenn Nawada suggests houseplants for areas of shade, partial shade and sun. Heath explains techniques for drilling holes to run electrical wire. Jenn Largesse shows how to put up an outdoor vinyl fence. Tom builds a beehive out of wood. 27 DIY Birdbath, Dog Chew Wood Repair Episode 2728th April 2022 Nathan shows how to mount a flat screen TV on a wall. Mark builds a stone birdbath. Tom repairs a Newel post damaged by a dog. 28 Garage Door Replacement, Emergency Plumbing Fixes Episode 285th May 2022 Ross shares why he became an engineer; Tom talks about different types of hammers; Richard shows how to control common plumbing emergencies; Nathan removes and replaces a garage door. 29 All About Hydrangeas, Refinish Deck Railing Episode 2912th May 2022 Jenn shows off different varieties of hydrangeas; Heath explains types of smoke and carbon monoxide detectors and their functions; Mauro refinishes deck railings and posts. 30 Replacing a Toilet Seat, Full Mortise Lockset Repair Episode 3019th May 2022 Richard shows how to replace a toilet seat; Jenn Largesse builds a pergola for her backyard; Nathan repairs a century-old full mortise lockset. 31 All About Succulents, Under-Sink Water Filter Episode 3126th May 2022 Jenn talks about different types of succulents; Richard installs a reverse osmosis under-sink water filter; Tom builds a classic milk stool. 32 Basic Electrical Tools; Home Energy Assessment Episode 322nd June 2022 Using common electrical tools; an in-depth home energy assessment; painting. 33 Happy Father's Day Episode 3323rd June 2022 Team members talk about their fathers as mentors; airflow in buildings; finishing a baseball bat display case. 34 Moving a Ceiling Light Fixture; Tool Lab -- Finish Nailers Episode 3430th June 2022 Kevin O'Connor explains how he became host of "This Old House"; a simple trick for drawing a perfect ellipse; moving a light fixture and patching the ceiling; the basics of finish nailers. 35 Crown Molding for Corner Angles; The Future of Solar Episode 357th July 2022 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. 36 Track Saws, Adding A Receptacle Episode 3614th July 2022 Mauro shares why he became a painter and what he loves about his job; Jenn shows how to test soil at home; Nathan explains how to use track saws; Heath adds a receptacle to a kitchen island. 37 Deck Chairs, Damp Basement Episode 3721st July 2022 Tom shares a trick to space balusters evenly; Heath shows how to drill holes in studs to run wire; Jenn Largesse builds DIY deck chairs; Richard explains ways to deal with a damp basement. 38 Pond Maintenance, Demilune Table Episode 3828th July 2022 Mark explains finishes for brick and concrete; Jenn shows how to maintain a small backyard pond; Tom builds a three-legged Demilune table. 39 Pizza Oven Repair, What Is It? Episode 394th August 2022 Nathan explains the anatomy of track saws; Mark repoints an outdoor pizza oven; The Ask This Old House team comes together for a 20th Anniversary "What Is It?"