Ask This Old House Show Summary, Upcoming Episodes and TV Guide

Spacing balusters evenly; drilling holes in studs to run wire; building deck chairs; ways to deal with a damp basement.

Applying caulk in gaps; installing crown molding around corner angles; the future of solar.

Team members talk about their fathers as mentors; airflow in buildings; finishing a baseball bat display case.

Ross explores ways that landscaping could be done automatically; Mark goes over different walkway and driveway deicers and how they might impact masonry products; Tom and Kevin build a modern bench.

Richard explains how a mini split unit is installed; Jenn explains how to identify Japanese maple trees and how to incorporate them in a landscape design; then Nathan installs a butcher block countertop.

Jenn demonstrates how to clean up a garden; Ross explains how air filters can catch unwanted air impurities and demonstrates how to build a DIY one; Tom and Kevin build an Adirondack chair.

Nathan Gilbert helps a homeowner turn a reclaimed beam into a fireplace mantel; Richard Trethewey shows how to change a bathroom faucet; Ross Trethewey explores innovations to geothermal installations.

In this special episode of Ask This Old House, Tom Silva and Mark McCullough tell you everything you need to know about fireplaces; Tom builds a custom mantel for a homeowner; Richard Trethewey discusses fireplace inserts; Mark replaces the hearth of a fireplace with granite.

In this special episode of Ask This Old House, Tom Silva and Kevin O'Connor explain everything you need to know about using, installing, maintaining and repairing a window.

In this special episode of Ask This Old House, Roger Cook, Jenn Nawada and Mark McCullough explain best practices for installing or repairing a walkway; Mark helps a homeowner install a new walkway using natural stone.

Tom Silva helps two homeowners build a two-level deck from start to finish.

Jenn plants a rain garden to keep runoff and waste out of marshlands. Scott brightens up a bedroom with new overhead lighting. Tom gives tips on installing cabinets accurately and consistently.

Richard uses cameras to locate a drain problem. Scott warms up a chilly bathroom, installing an electric convection heater. Mauro demonstrates a masking primer that leaves clean lines on a window.

Richard helps a homeowner improve her drinking water with a whole house filter. Jenn creates a backyard sanctuary with a patio and fire pit. Tom explains the differences between soft and hard wood.

Richard revisits a homeowner to repair a water heater. Tom installs a storm door with a dog in mind. And home technology expert Ross Trethewey looks at voice-activated smart devices.

Scott helps a homeowner raise and lower a light with a motorized lift. Tom shows Kevin the best uses for jigsaw and how to choose blades. Roger visits Kentucky to help a homeowner repair his lawn.

Tom creates wainscoting out of base cap molding. NASA astronaut Mike Foreman visits to show off a few space tools. Richard helps a homeowner to get enough hot water for his children's bath time.

Jenn learns about rooftop and small space gardens. Tom explains best practices to remove stains from plaster and dry wall. Scott powers a shed by running electricity underground from the house.

Roger rips up an old, dangerous walkway to replace it with bluestone. Scott explains the best wire nuts to use for each project. Kevin gets a lesson on making mead.

Kevin install a home elevator. Jenn Nawada investigates how to grow microgreens. Tom explains the best way to match historic moldings. And Richard diagnoses a problem with well water.

Ross Trethewey helps build a robotic wall that could be the key to tight spaces in urban living. Tom and Kevin use reclaimed pine heart wood to create a bench with a historic theme in Build It.

Tom repairs a broken board on a front porch. Richard analyzes a homeowner's green-stained shower. Scott brings more power to a bedroom and is able to conceal the wiring with crown molding.

Tom and Kevin use store-bought stair treads to create a bookshelf in Build It. And landscape designer Jenn Nawada transforms the look of a home's foundation by using existing plants.

In the premiere of the 15th season, Tom replaces sash balancers on an antique window. Roger and Kevin check out the benefits of a robotic lawnmower. And Richard talks about treating water with lead.

Transforming a bookshelf into a secret passage; installing an outdoor house hydrant to repair a leaky spigot; tools for electrical work.

Adding festive lighting to a deck; fireplace options; tools for first-time gardeners.

Converting a front yard into a wildlife oasis; restoring a wood floor; unclogging a sink.

Overhauling an old chimney; installing an exhaust fan in the kitchen; roof shingles.

Adding a coat rack, shelving and a new door to a closet; leaky toilet; replacing a sconce at a home that was formerly a church.

Turning old oak into a coffee table; driveway lawn; avoiding frozen pipes.

Installing a whole house fan; working with students to liven up a school garden; water heater regulations.

Electrician Scott Caron helps a homeowner install an electric vehicle charger next to his house. The guys ask, 'What Is It?' Then, Richard helps a homeowner install a new kitchen sink.

Tom and Kevin discuss kitchen island dimensions. Richard quiets a noisy baseboard heating system. The guys ask, 'What Is It?' Scott Caron helps a homeowner add light to a kitchen by install three new recessed cans.

Scott Caron installs some landscape lighting. Kevin, Tom, Richard and Roger ask 'What Is It?' Richard replaces a water main shutoff.

Scott Caron helps a homeowner replace an undersized ceiling fan with a more appropriate one. Kevin, Tom, Richard and Roger ask 'What Is It?' Roger visits a bonsai nursery to learn the art of sculpting trees.

Tom helps a homeowner replace broken sash cords. Roger shows a homeowner how to plant bulbs. And the guys play 'What Is It' with special guest Doris Kearns Goodwin.

Richard installs a whole house ductless heating and cooling system. Kevin shares some tips on hearing protection and Tom helps a homeowner repair a sagging plaster ceiling. Then, Kevin, along with Roger, Richard, and Tom ask 'What Is It?'

Tom helps a homeowner install interior window trim. Richard shares some first time plumbing tips with Kevin. Scott Caron wires an above ground pool safely. Kevin, along with Roger, Richard, and Tom ask 'What Is It?'

Tom replaces a broken window with a safer solution. Kevin, along with Roger, Richard, and Tom ask 'What Is It?' Richard shows a homeowner how to rotate a toilet.

Roger helps a homeowner build a hydroponic garden. The guys ask 'What Is It?' Richard helps a homeowner install a hot and cold water outdoor faucet.

Roger learns from a beekeeper how to set up a beehive for a homeowner. The guys ask, 'What is it?' Scott Caron adds lighting to a dark kitchen without having to run new wiring.

Tom teaches a homeowner how to repair structural problems in his home. Scott Caron helps a homeowner run wiring for a new ceiling fixture and switch in a living room. The guys ask, 'What is it?'

Roger educates Kevin on beneficial insects. Tom resizes a front door that gets stuck on carpet every time it opens. Richard repairs an outdoor garden faucet. The guys ask 'What Is It?'

Richard shows Kevin some solutions for dealing with rust stains. Tom installs a pass through in a load-bearing wall. Roger replaces a poorly built fence gate. The guys play 'What Is It' with special guest NASA Astronaut Rick Mastracchio.

Tom and Kevin build a simple table from solid fir, and Kevin works with a wood finishing expert to stain and finish it. Roger shows a homeowner how to get rid of tree stumps. And Richard discusses the state of solar energy.

Kevin works with an expert to fabricate and install custom concrete countertops. Richard shows how to make watertight connections without soldering. Roger Cook demonstrates several new cordless landscape tools.

Roger repairs a drip irrigation system The guys ask 'What is it?' Richard and tile expert Joe Ferrante help repair a leaky bathtub once and for all.