26 aired episodes
Independent episode guide to the 26 aired Ask This Old House Season 23 recaps on this site, from episode 1 through episode 26, in broadcast order.
Recaps on this site, in episode order.
June 12, 2025 · 8 min
Richard and Nathan install grab bars and a hand shower for Margaret, who wants to stay in her 1890 house. Tom and Nathan replace rotten wooden gutters on Regina's 1882 home, sistering rafter tails, scribing a new gutter profile, and sealing with lead and boiled linseed oil.
June 19, 2025 · 8 min
Mauro Henrique fixes a returning drywall crack with mesh tape, Tom Silva baffles the crew with an inflatable lifting tool, Mark McCullough walks through a thousand years of brick, and Richard Trethewey upgrades two baseboard covers without tearing out the old heating.
July 5, 2025 · 10 min
A journey to Florida for tropical gardening, a clever roofing tool that solves real problems, and practical guidance for smart lighting upgrades in your home.
July 8, 2025 · 11 min
A heartfelt exploration of Season 23 Episode 4 featuring Mauro's bulkhead transformation, Tom's combination square masterclass, and Mark's masonry magic on deteriorating stone steps.
July 10, 2025 · 12 min
A deep dive into Season 23 Episode 5 featuring Nathan Gilbert's medicine cabinet installation, Mark McCullough's chimney crown replacement, and the fascinating world of construction time capsules.
July 12, 2025 · 10 min
A practical exploration of Season 23 Episode 6 featuring Jenn's drainage solutions, Kevin Cradock's carpentry showcase, and Heath's ceiling fan installation with proper electrical safety.
July 24, 2025 · 7 min
Carmen Gonzalez hangs grass cloth on a Miami accent wall, Lee Gilliam sorts pop-up, rotary, drip, and hose-end sprinklers, and Richard Trethewey cuts a submersible sump pump into a wet basement floor. Same question in all three: where do you want the water to go?
July 31, 2025 · 8 min
Ross Trethewey fixes winter dry air with a steam humidifier, Mauro Henrique stacks and sprays shutters in bulk, and Tom Silva builds a triangular teak outdoor end table. The useful lesson is that humidity control is mechanical, not a bowl of water on the radiator.
August 7, 2025 · 8 min
Mark McCullough rebuilds a self-installed pandemic paver patio by fixing the base, the pitch, and the drainage path. Nathan Gilbert walks Kevin O'Connor through fiberglass and aluminum ladders, and Heath Eastman adds a Level 2 EV charger to Nadia's garage without a service upgrade.
August 7, 2025 · 9 min
Nathan Gilbert replaces a broken double trash can pullout in a 1997 kitchen, Heath Eastman explains why incandescent and fluorescent bulbs are being phased out, and Lee Gilliam removes overgrown emerald green arborvitaes while saving an oakleaf hydrangea. Three house calls, one shared moment: something built for an earlier set of assumptions has run out its clock.
August 14, 2025 · 8 min
Mark McCullough builds a gravel shed foundation in Detroit, Tom Silva and Nathan Gilbert walk through non-load-bearing wall framing, and Nathan installs a bifold-door partition to hide a laundry area. The door gets the credit; the base and the rough opening do the work.
August 21, 2025 · 9 min
Richard Trethewey converts a smoky wood-burning fireplace to a sealed gas insert with a crew of licensed trades, Nathan Gilbert installs flat panel wainscoting in an old dining room, and Tom Silva stumps the table with a spring-loaded nail set.
August 28, 2025 · 6 min
Jenn Nawada visits a Detroit beekeeper to learn how a hive works and how honey gets harvested. Heath Eastman, Lee Gilliam, and Ross Trethewey share phone apps they use on the job. Tom Silva and Kevin O'Connor cut a curved toddler step stool with a mobile CNC router that nudges Kevin back on line.
September 4, 2025 · 7 min
Mauro Henrique sprays wainscoting with an airless rig and a room full of masking, Kevin O'Connor, Ross Trethewey, and Heath Eastman compare heat pumps with fossil fuels using a levelized cost chart, and Nathan Gilbert builds a pressure-treated sandbox with two brothers who take digging seriously.
September 11, 2025 · 8 min
Ross Trethewey tours a 4,000-square-foot Austin house being printed in concrete, Aaron Smith shows how a Detroit tool library and garden build neighborhood capacity, and Tom Silva turns a square bubinga bowl with four legs on a new lathe. Three completely different jobs, one shared requirement: you can't skip the layer underneath.
September 18, 2025 · 8 min
Mauro Henrique teaches a homeowner to paint unfinished stair treads and a handrail, Heath Eastman restores buried sconce boxes above a fireplace, and the crew empties their bags for a tool talk. One job finishes a surface the homeowner already started; the other recovers lighting a previous owner covered up.
March 27, 2025 · 7 min
Jenn Nawada and Mark McCullough lay out a Cape Cod outdoor shower between two windows, Mark runs a pitched drain line away from the foundation, Nathan Gilbert assembles a white-cedar kit, and Richard Trethewey taps hot water through a frost-proof hydrant. The cedar and bluestone are what you see. The grade, gravel, and pitch decide whether the house stays dry.
April 3, 2025 · 9 min
Lee Gilliam brings in arborist Brandon Maltby to diagnose a red pine that has been browning out for years, and the treatment starts with mulch, fabric, and dead needles before any spray schedule. Nathan Gilbert then walks a first-time Detroit homeowner through a top-to-bottom maintenance checklist, from shingles and gutters to the water shutoff, the gas meter, and a house binder.
April 10, 2025 · 8 min
Richard Trethewey shows what mini split upkeep actually involves: filters, cowl, coils, outdoor condenser. Mark McCullough and Jenn Nawada build a two-foot retaining wall for curb appeal. The wall is the visible win; the perforated pipe, gravel, fabric, and racked-back courses are the reason it should stay put.
April 17, 2025 · 8 min
Lee Gilliam compares dethatching rakes and core aeration timing, Heath Eastman installs a smart energy monitor at a 1875 house to track a winter bill spike, and Tom Silva walks Kevin through router bases, bits, and depth stops. The monitor finds no fault, which turns out to be the useful answer.
April 24, 2025 · 8 min
Lee Gilliam helps Kristen add a dedicated drip zone for container plantings in Austin, licensed irrigator Aaron ties into the mainline, Richard Trethewey weighs PEX against copper, and Nathan Gilbert repairs a door hinge with dowels, epoxy, and longer slotted screws.
May 1, 2025 · 7 min
Jenn Nawada visits Detroit Hives and helps a Boston-Edison couple plant an elevated herb and pollinator garden, Tom Silva separates impact drivers from drill drivers, and Mark McCullough tears out a failing brick apron and sets Belgian cobblestone into fresh concrete.
May 8, 2025 · 7 min
Ross Trethewey finds a Miami bedroom starved for airflow, Mauro Henrique dissolves bad shellac with alcohol instead of sandpaper, and Shelby Barnhart turns a childhood barn into a metal shop.
May 15, 2025 · 8 min
Ross Trethewey measures a howling return register in decibels, Lee Gilliam walks Valerie through core aeration and overseeding after a drought, and Mark McCullough patches cracked stucco over a concrete foundation in Austin by listening for hollow spots.
May 22, 2025 · 7 min
The tribute episode slows down to remember Roger Cook through Latin plant names, the three-cut pruning method, muddy jeans, and the Parrotia persica planted at the barn. It is less a repair lesson than a reminder that Roger's real craft was teaching people to do the work right.
May 29, 2025 · 7 min
Tom Silva builds modular 3/4-inch plywood mudroom cubbies with cap screws and dadoed shelves, Mauro Henrique primes and sprays them Classic Burgundy, and Jenn Nawada explains mulch types and how to calculate cubic yards.
