Ask This Old House

Tom travels to Los Angeles to install an electric whole house fan in an attic; Roger and Jenn build a raised-bed vegetable garden with students; Richard explains new water heater regulations.

Using a chainsaw; improving the electrical connection to a garage; silencing squeaky floors in a baby's room.

Roger shows how to clean out a driveway pothole and repair it; Tom and Kevin find inspiration in an old Shaker table design and bring history to life; What Is It?; Scott turns a vintage railroad lantern into a modern electric lamp.

Richard and Kevin discover how Germany has become a world leader in energy efficiency; they find answers in the mechanical rooms of a home and a bed and breakfast; Kevin and Ross head to Texas to install a residential wind turbine.

Jenn shows homeowners how to use organic waste to create compost; Richard checks out a troublesome steam boiler to find out why it's losing so much water; the guys ask "What Is It?"

Richard travels to Atlanta to replace a vessel sink with a self-rimming sink; Scott installs a motion sensor security light in a driveway.

Roger heads to Texas for a lesson on planting a butterfly garden; Tom maps out the best tools for woodworking beginners; Scott helps a homeowner find automatic illumination for her closet.

Kevin heads to a brewery to learn how to make his own beer; Bridget Lancaster stops by with a lesson on ales versus lagers; Tom is in Baltimore to help install a do-it-yourself rain barrel; Richard's advice on what not to put in disposers.

Kevin visits Delaware to help a new mother childproof her home; Richard uses his skills to fix an under-counter mount sink; Scott gives Kevin a tutorial on the latest voltage testers.

In this winter weather special, Scott offers an electrical solution to ice dams; Kevin talks climate change with Weather Channel Meteorologist Jim Cantore; Roger has a few tips on snow blower maintenance; Richard goes over furnace upkeep.

Roger heads to Cape Cod to transform a patch of grass into a lawn you can drive on; Tom and Kevin use reclaimed oak wood to create a coffee table; Richard explains how to avoid frozen pipes in the winter months.

Scott heads to South Dakota to install a post light; Richard is in Delaware to replace a pedestal sink; landscape designer Jenn Nawada explains how to make succulent plants into a piece of art; a wand with three probes.

Tom checks out underground street caves in Saint Paul and replaces a rickety attic staircase in Minneapolis; Richard gives a tutorial on blowtorches; Kevin shows a homeowner how to use paint to give an old kitchen a makeover.

Kevin uses a smartphone app to help a homeowner turn his front door deadbolt into an electronic entrance; Scott installs a television outdoors for a little open-air entertainment; in What Is It?, it's a white sphere with blue holes.

Tom trims a coat closet to include a shelf and hanger pole and then installs a pre-hung door; Richard explains why a toilet may be leaking; Scott gives an old Philadelphia church a new look with an outdoor wall sconce.

Tom and Kevin head to Connecticut to construct a backyard chicken coop; Jenn Nawada visits a Vermont maple syrup farm to learn how it's made; Christopher Kimball stops by to break down the best and worst maple syrup; choosing the right USB outlet.

Kevin heads to Fort Worth, Texas to help a homeowner reignite her old gas fireplace; Scott Caron installs an exhaust fan to eliminate odors in a kitchen; Tom gives a step-by-step tutorial on roof shingling.

Scott heads to St. Paul, Minn., to wire a light fixture to match an antique home's aesthetic; Richard makes an old tub safe by installing an overflow; Tom explains what every homeowner should have for insulation when it comes to R-value; What Is It?

Tom is ready to patch up an old hardwood floor and make it look seamless; Richard reveals the best methods to unclog a bathroom sink; landscape designer Jenn Nawada heads to Washington, DC to plant a garden for birds and pollinators.

Landscaper Roger Cook takes a trip to Idaho to learn about growing potatoes; Kevin meets with The Weather Channel's Jim Cantore to discuss home weather stations; Scott Caron installs track lighting and lights that double as speakers; What is it?

Richard installs a washer and dryer to help a homeowner with his laundry; Tom explains how to use of a drill-driver; Scott adds an overhead chandelier to a dimly lit dining room.

Tom uses all his skills to help install a salvaged door into an existing opening; Richard explains how a plumbing trap can lose water; Roger gets a lesson on the best way to grow culinary herbs in one's house.

Scott Caron helps a Texas homeowner get the party started by installing some fiesta lights; Jenn Nawada gives a tutorial on the best tools for first-time gardeners; Kevin walks through the best options for a home fireplace.

Actor Nick Offerman stops by to play What is it? and give some advice on woodworking. Tom creates a bookshelf from black pipe; Jenn Nawada helps to install a pondless waterfall; Scott Caron explains what everything means on the labels of light bulbs.

Tom heads to Salem, Mass., to install a bookshelf that doubles as a hidden doorway; Scott Caron explains how two tools are all he needs to do many electrical projects; Richard installs a house hydrant to replace a leaky outdoor spigot.

Tom and Kevin head to Montana to build an accessible home gym for a Navy SEAL who was injured in Afghanistan; master electrician Scott Caron helps a homeowner replace a broken doorbell chime; Richard explains PVC pipe terminology.