archytele The Vault
Season guide

Ask This Old House: Season 18

26 episodes Premiered Oct 5, 2019 Updated Sep 27, 2026
Previously on Ask This Old House

Season 18 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ Directly follows the overarching narrative developments of Ask This Old House Season 17.
  • ⚡ Faction dynamics and core character alliances shift under escalating external stakes.
  • ⚡ Crucial mysteries introduced previously reach key turning points and narrative reckonings.
  • ⚡ Sets up serialized story arcs that build directly toward the climactic season finale.
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Season 18 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 18 Progress Shield

Future titles & synopses blurred. Tap "Reveal" on any card to peek.
Binge Efficiency Engine

Season 18: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

12%
88%
Mytharc (3): Crucial lore & season climaxes
Core (23): Character development & subplots
Side Quest (0): Standalone / filler
S18·E1 Mytharc

Sliding Barn Door, Dry Well

Oct 5, 2019 · 30 min

Nathan travels to Birmingham, Alabama to install a sliding barn door in an open-concept loft apartment. Tom compares the qualities of different types of roofing materials. Ross exp

S18·E2 Core

Nursery Paint, Record Stand

Oct 12, 2019 · 30 min

Mauro paints a baby’s nursery using zero VOC paint. Richard tests out a new dryer that uses a heat pump to dry the clothes. Tom and Kevin build a record player stand out of oak ply

S18·E3 Core

Radiator, Fireplace Veneer

Oct 19, 2019 · 30 min

Mark replaces a homeowner's sloppy fireplace surround with a clean, thin brick veneer.

S18·E4 Core

Ductless Humidifier, Planters

Oct 26, 2019 · 30 min

The uses and purposes for different types of screws. Installing a whole house ductless humidifier. Changes to electric bill payment structures. Installing a front entry planter.

S18·E5 Core

Built-in, Dining Room Light

Nov 2, 2019 · 30 min

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

S18·E6 Core

Women's Repair Class; Garden

Nov 9, 2019 · 30 min

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

S18·E7 Core

Switch; Affordable Geothermal

Nov 16, 2019 · 30 min

Replacing a standard toggle switch with an antique push button switch; affordable geothermal heat pumps.

S18·E8 Core

Polybutylene; Squeaky Door

Nov 23, 2019 · 30 min

Indoor air quality; replacing polybutylene piping with conventional PEX; drop cloths; different methods for silencing a squeaky door.

S18·E9 Core

Cable Railing; Painting Shutters

Jan 4, 2020 · 30 min

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

S18·E10 Core

Beehive Oven; Jimmy DiResta

Jan 11, 2020 · 30 min

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

S18·E11 Core

Stoop Planters; Fireplace Insert

Jan 18, 2020 · 30 min

Building a hexagon planter; reviving a stoop; home inspection nightmares; installing an electric fireplace insert.

S18·E12 Core

Ceiling Light; Tool Storage

Jan 25, 2020 · 30 min

Installing a ceiling light; installing the temperature rating system for ceiling lights; the uses for different types of trowels; building a tool storage shelf.

S18·E13 Core

Loose Railing; Smart Thermostat

Feb 1, 2020 · 30 min

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

S18·E14 Core

Weird Shower Valve; Mossy Roof

Feb 8, 2020 · 30 min

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

S18·E15 Core

Indoor Garden; Fireplace Hearth

Feb 15, 2020 · 30 min

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

S18·E16 Core

Dog Dish Stand; Gas Lantern

Feb 22, 2020 · 30 min

Using a mobile CNC routing machine; building a dog dish stand using power tools; different methods for wiring a portable generator to a house.

S18·E17 Core

Cherry Blossoms; Mount Rushmore

Mar 28, 2020 · 30 min

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

S18·E18 Core

Custom Screen Door; Paint Trim

Apr 4, 2020 · 30 min

Ross tests out some new smart lighting configurations, while Tom helps a homeowner build a custom screen door. Richard gives general advice on maintaining a washing machine, and Ma

S18·E19 Core

Ground Wire; Fireplace Doors

Apr 11, 2020 · 30 min

Kevin works with Jenn Largesse to demonstrate a technique on a trim router. Heath grounds an outlet, while Mauro explains paint rollers and demonstrates rolling techniques. Mark th

S18·E20 Core

Pedestal Sink; Grout Cleaning

Apr 18, 2020 · 30 min

In this episode, Richard helps a homeowner replace components of his pedestal sink, and Heath discusses bathroom vent fans. The team shares home inspection nightmares, and Tom expl

S18·E21 Core

Paver Patio; Shoe Rack

Apr 25, 2020 · 30 min

Mark helps a couple install a concrete paver patio; Jenn discusses the common elements she includes in outdoor kitchen designs; Tom and Kevin build a combination bench/shoe rack ou

S18·E22 Core

Cedar Shingles; Vegetable Garden

May 2, 2020 · 30 min

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 veg

S18·E23 Core

Mantel; Too Many Light Switches

May 9, 2020 · 30 min

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 switc

S18·E24 Core

Pantry Doors; Reflective Shingle

May 16, 2020 · 30 min

Nathan installs bypass doors for a pantry; Richard tests different smart automatic water shutoff valves; Ross explores asphalt roof shingles that can reflect some of the sun’s heat

S18·E25 Mytharc

Quartz Countertops; Firepit Kit

May 23, 2020 · 30 min

Kevin learns how quartz countertops are manufactured and installed. Nathan explains how to hang and display a U.S. flag, and Tom and Jenn split firewood. Then, Mark installs a fire

S18·E26 Mytharc

Shower Cartridge; Turning a Bowl

May 30, 2020 · 30 min

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

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