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Richard helps a homeowner replace a vessel sink with a self-rimming one. Scott installs a motion-activated, security light fixture. And it’s plastic with a louver on the bottom and an opening at the top, but "What is it?"

In this guide and video, we show you how to restore terrazzo floors in your home. In most cases, you'll hire a professional for the job.

Ask This Old House plumbing and heating expert Richard Trethewey demonstrates some common plumbing mistakes and how to avoid them.

Do you sagging floors have you worried about your home's structural stability? Believe it or not, you can fix a cracked floor joist yourself.

Ask This Old House Master Electrician Scott Caron installs a light above a garage to illuminate a dark driveway

Learn how to switch out one type of sink to another with This Old House plumbing and heating expert Richard Trethewey.

Ask This Old House general contractor Tom Silva asks plumbing and heating expert Richard Trethewey, landscape contractor Roger Cook, and host Kevin O'Connor to guess what this white plastic tool with a louver at the bottom and an opening on the top might be

Porch piers are fitted, and the homeowners explore kitchen cabinet options. Tommy vacuums the old insulation while Norm resizes a door for the kids’ bath.

Jenn is on a recycling mission. She shows homeowners how to use organic waste to create soil for gardening. Plus, Richard is ready to solve a basement mystery. And a metal cylinder with a clamp has the guys asking, "What is it?"

Ask This Old House general contractor Tom Silva asks plumbing and heating expert Richard Trethewey, landscape contractor Roger Cook, and host Kevin O'Connor to guess what this silver cylinder on a gooseneck might be

Ask This Old House plumbing and heating expert Richard Trethewey helps locate the leak on a steam boiler that's losing water.

Ask This Old House landscape designer Jenn Nawada gets a lesson on the best ways to compost organic materials at home.

Learn how to use oak stair treads and pine boards to create right-sized shelves that keep books and toys within easy reach of small hands.

Richard and Kevin investigate Germany’s energy efficiency. Kevin and Ross head to Texas to install a residential wind turbine in Texas.

Flitch beams are installed. Kevin tours the Laminated Veneer Lumber Factory. Richard finds a rear-mounted toilet and the homeowners formulate a landscape plan.

Do you live in the perfect place for a wind turbine? Add this renewable energy feature to your lot for an eco-friendly way to save money.

Ask This Old House plumbing and heating expert Richard Trethewey explains how the country's building practices and lifestyle affect energy consumption

Take a video tour of this storybook cottage with craftsman-style charm

Roger repairs a large pothole. Tom and Kevin make a Shaker table in a "Build It" segment. Scott turns a vintage railroad lantern into a modern electric lamp. And a black metal box has the guys asking "What Is It?"