Ask This Old House

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.

Kevin visits Chicago to explore the dangers of home fires and ways to stay safe. Scott shows off a portable generator that doesn't run on gas. Richard finds a rusted sink strainer in the kitchen. And the guys ask, “What is it?”

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.

Roger helps plant a home orchard using apple and pear trees. Tom shows Kevin how to choose and use a circular saw. Richard installs a new tank water heater and discusses new regulations on them.

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.

Richard learns about a way to heat and cool a house using a new room-by-room ventilation system. Tom explains the best ways to patch a small hole in the wall. And the guys ask, “What is it?”

In Future House, 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.

Richard travels to Seattle to help a couple choose and install laundry appliances. Tom shows Kevin new table saw technology. And Scott repairs a three-way switch. In How to Choose and Install Laundry Appliances, Richard is in Seattle to help a couple choose laundry appliances that will be energy efficient.

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

Tom heads to Chicago to transform a one-car garage into a carpentry workshop. Scott installs a wireless light switch. Richard gives a history lesson on antique bath fixtures.

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.

Landscape Designer Jenn Nawada shares an environmentally safe way to keep walkways safe during the winter. Tom gives a tutorial on hand saws, showing how and when to use them. Richard helps a homeowner diagnose a problem with a hot water radiator. The guys have a small, orange cone, but “What is it?”

Landscape designer Jenn Nawada learns how to garden on a rooftop. Tom gives tips on removing ceiling stains. And Scott brings power to a homeowner’s shed

Kevin heads to Los Angeles to meet up with Nick Offerman and get a firsthand look at the comedian’s woodworking shop. Home technology expert Ross Trethewey looks at a new device to track home energy usage in Future House. And Richard shows what happens when you use the wrong soap in the dishwasher.

Tom is in Cincinnati to create a simulated wainscoting out of base cap molding. NASA astronaut Mike Foreman visits the barn to show off a few space tools and inspire the next generation of skilled laborers. Richard helps a homeowner struggling to get enough hot water for his children’s bath time.

Tom and Kevin use scrap wood to create an end grain cutting board in Build It. Scott installs surface-mounted downlights in a living room. Roger discusses the best ways to keep mice out of your house. And the guys ask, “What is it?”

Roger is in Kentucky – the Bluegrass State – to bring back a lawn’s luster. Scott gives a homeowner a lift by installing a motorized winch to raise and lower a light. Tom has tips and tricks for using a jigsaw

Tom gives a homeowner a tutorial on installing a passage set on his closet door. Jenn Nawada uses an historic design as a guide to transform an overgrown backyard. Richard shows off the latest in toilet technology.

Richard revisits a homeowner to deal with a hot water issue. Tom installs a storm door

Tom and Kevin are ready to bring the family together with a home message center in Build It. Scott brightens up a room by adding cable-powered fixtures. And Richard shares an emotional story about the need for carbon monoxide detectors.

See Richard help a homeowner improve her drinking water with a whole house filter. Jenn Nawada creates a backyard sanctuary with a patio and granite fire pit. Watch Tom explain the differences between soft and hard wood.

A clogged drain has Richard fishing cameras through pipes to locate the problem. Scott warms up a chilly bathroom by installing an electric convection heater. Painter Mauro Henrique demonstrates a masking primer that leaves clean lines on a window.

See Tom and Kevin use western red cedar to create a planter box in Build It. Watch home technology expert Ross Trethewey feature a tablet attachment that makes 3D scans of home interiors in Future House. Scott explains the need for surge protection.

Protecting the environment – Watch Jenn plant a rain garden to keep runoff and waste out of marshlands. See Scott brighten up a dim bedroom with new overhead lighting. Tom gives tips on installing cabinet hardware accurately and consistently.

That makes 50! The guys complete the show’s run of every U.S. state. Tom learns how to create a unique keepsake box from island materials in Build It. Richard looks at a new way to store solar energy. Roger helps a family grow an organic garden.