Season 22 - Episode Guide

Nathan recounts his time as a Boy Scout; Tom and Kevin build a hexagon herb planter; Jenn shows materials needed to build a raised planter; Jenn and Nathan rebuild a Girl Scout troop's garden beds.

Heath helps a homeowner install string lights over a patio; Mauro color matches a retro aqua kitchen cabinet and repaints it. Mauro goes to Home Depot to demonstration the color matching process.

Ask This Old House celebrates landscape contractor, Lee Gilliam and welcomes him to the cast; Richard helps a homeowner repair a leaking shower valve; Lee and Jenn refresh an eroding sloped yard.

Nathan heads to Tulsa, Oklahoma to build a replacement utility cover. Ross discusses low level carbon monoxide exposure. Mark helps a homeowner clean out creosote build-up in their kitchen fireplace.

Heath helps a homeowner install a generator hook up to the homes circuit board; Environmental contractor, Ron Peik demystifies asbestos; Mark fixes a faulty brick lintel repair on an 1833 home.

Mauro shares the importance of prep work. Then, he and Kevin whitewash an outdoor bench; Tom learns how double pane glass is made and then repairs a broken window.

Jenn heads to Portland, Oregon to help a couple install a rain garden; Ross shares how moisture meters can detect unseen water damage; Mark installs a railing on concrete steps.

Lee shares key tools and products in a winter weather kit; Richard shares a unique water heater; Mark shares homeowner-friendly masonry tools; Tom and Kevin build a new miter saw station.

Heath shares what factors to consider when selecting a generator and the options available; Jenn shows how to build a worm farm; Mauro heads to Oklahoma to repaint a homeowner's front door.

Nathan gives a homeowner a backyard entrance by converting a window into a backdoor. Then, the team discuss dealbreakers homeowners should consider when looking to buy a home without major renovations.

Nathan shares his love of flea markets; Mauro cleans up a garage by painting over graffiti; Ross shares the importance of radon testing; Nathan helps ready a nursery by installing closet shelving.

Richard helps a homeowner troubleshoot why her shower quickly runs out of hot water; Kevin heads to Upstate New York to meet with maker Jimmy DiResta and learns how to make a leather tote bag.

Heath shares his tips and tools homeowners can use to identify and label home circuit breakers; Tom discusses his hobby of lathe turning; Then, in Build It he turns a segmented bowl.

Mauro discusses how he sees color and some of his favorite colors; Then, he paints over an offices wood paneling; Lee discusses shrub pruning tools; Nathan travels to Portland to build a mud kitchen.

Lee cleans up a backyard by removing invasive plants; Mark discusses chimney caps and how to know if you need one; Richard installs a bidet toilet and shares what bidet options are available.

The Ask team explores how homeowners can protect their houses against wildfires. Jenn learns about firescaping, Tom fire hardens a home, and Richard learns a weeding method to lower fire spreading.

Nathan installs a shade sail for a sunny pool area; Ask This Old House spotlights the brothers of a landscaping company in the Atlanta area; Mark makes a cost-effective concrete walkway repair.

Lee troubleshoots why a backyard won't grow grass and installs a shade-tolerant sod; Ross shares what to consider before converting to heat pumps; Kevin and maker Sarah Nadarajah build a side table.

Richard praises the marvel of modern plumbing, then retrofits a radiant floor system; Nathan explains cable railing connections and maintenance; Jenn shares the updated USDA Plant Hardiness Zone Map.

Jenn and Nathan review Tulsa's stormwater management and install a rain barrel; Mark helps a homeowner divert water from her pooling patio; the team shares new additions to their tool bags.

Jenn helps a couple reimagine their yard after removed trees changed the shade pattern; Richard shares his love of teaching and gives Kevin a tour of his new HVAC distribution and education center.

Mauro brightens a dark apartment using paint concentrations; Mark and Richard discuss what naturally causes wet basements and how to mitigate it; Tom and Kevin build a bat house.

Lee revives a homeowner's garden bed; a New Hampshire painter shares how she got into the trade; Heath installs a bathroom fan in a house with bad wiring.

Ross helps a homeowner install a smart thermostat after discovering a wiring issue; Mauro shares tips on staining a deck to protect and maintain it; Mark helps a homeowner clean a bluestone patio.

Ross discusses IAQ testing; Mark restores a Victorian firebox; Jenn and Lee discuss transitioning landscapes from Spring to Summer; Tom, Kevin, and Zack Dettmore organize a tool storage cabinet.

Jenn heads to Portland to check out the International Rose Test Garden; Nathan helps a homeowner replace damaged bathroom tiles; wrapping up the season, the team review comments left by show viewers.