Ask This Old House

Richard troubleshoots why a homeowner's shower leaks when the tub is running and makes the necessary repairs, then in studio, Richard explains why it was a unique repair; Heath deep dives into different wire gauge sizes and the electrical load capabilities of each size; Mark helps a homeowner repair some loose flagstone steps in his entryway and in his basement.

Lee helps a couple regrade their backyard to improve the lawn's health; Jenn shares houseplants that thrive at any light level, proving there's a perfect plant for every space; Nathan upgrades a homeowner's hollow-core doors to solid-core doors.

Lee helps a couple regrade their backyard to improve the lawn's health; Jenn shares houseplants that thrive at any light level, proving there's a perfect plant for every space; Nathan upgrades a homeowner's hollow-core doors to solid-core doors.

Tom Silva is rarely stumped. But when a homeowner reached out about a missing hand-turned spindle in the staircase of her 1900s Queen Anne Rowhouse, Tom attempts to replicate the spiral-detailed spindles on his lathe.

Lee helps a couple regrade their backyard to improve the lawn's health; Jenn shares houseplants that thrive at any light level, proving there's a perfect plant for every space; Nathan upgrades a homeowner's hollow-core doors to solid-core doors.

Lee helps a couple regrade their backyard to improve the lawn's health; Jenn shares houseplants that thrive at any light level, proving there's a perfect plant for every space; Nathan upgrades a homeowner's hollow-core doors to solid-core doors.

Lee helps a couple regrade their backyard to improve the lawn's health; Jenn shares houseplants that thrive at any light level, proving there's a perfect plant for every space; Nathan upgrades a homeowner's hollow-core doors to solid-core doors.

Tom shares a few methods to remove ring stains from a wood table; Jenn breaks down the types of soil and fertilizer needed for common indoor plants; Mark repairs a brick floor's crumbling mortar using spot pointing rather than a full repoint job.

Tom shares a few methods to remove ring stains from a wood table; Jenn breaks down the types of soil and fertilizer needed for common indoor plants; Mark repairs a brick floor's crumbling mortar using spot pointing rather than a full repoint job.

Tom shares a few methods to remove ring stains from a wood table; Jenn breaks down the types of soil and fertilizer needed for common indoor plants; Mark repairs a brick floor's crumbling mortar using spot pointing rather than a full repoint job.

Tom shares a few methods to remove ring stains from a wood table; Jenn breaks down the types of soil and fertilizer needed for common indoor plants; Mark repairs a brick floor's crumbling mortar using spot pointing rather than a full repoint job.

Heath helps a homeowner whose kitchen breaker trips when the basement humidifier is running by installing a new basement circuit; Tom showcases the importance of table saw safety by demonstrating safety techniques for the most common sources of table saw injuries; Richard helps a homeowner supplement their homes heating by installing a wood burning insert into their drafty fireplace.

Nathan mills a large piece of an old red oak tree.

Tom shares a few methods to remove ring stains from a wood table; Jenn breaks down the types of soil and fertilizer needed for common indoor plants; Mark repairs a brick floor's crumbling mortar using spot pointing rather than a full repoint job.

Tom shares a few methods to remove ring stains from a wood table; Jenn breaks down the types of soil and fertilizer needed for common indoor plants; Mark repairs a brick floor's crumbling mortar using spot pointing rather than a full repoint job.

Watch Tom pull off a balancing act to repair an old window.

Tom shares a few methods to remove ring stains from a wood table; Jenn breaks down the types of soil and fertilizer needed for common indoor plants; Mark repairs a brick floor's crumbling mortar using spot pointing rather than a full repoint job.

Tom shares a few methods to remove ring stains from a wood table; Jenn breaks down the types of soil and fertilizer needed for common indoor plants; Mark repairs a brick floor's crumbling mortar using spot pointing rather than a full repoint job.

Tom shares a few methods to remove ring stains from a wood table; Jenn breaks down the types of soil and fertilizer needed for common indoor plants; Mark repairs a brick floor's crumbling mortar using spot pointing rather than a full repoint job.

As they create paintings, beadwork, photographs, and films, four international artists reveal the complex ties between the communities and cultures they move between.

As they create paintings, beadwork, photographs, and films, four international artists reveal the complex ties between the communities and cultures they move between.

As they create paintings, beadwork, photographs, and films, four international artists reveal the complex ties between the communities and cultures they move between.

As they create paintings, beadwork, photographs, and films, four international artists reveal the complex ties between the communities and cultures they move between.

As they create paintings, beadwork, photographs, and films, four international artists reveal the complex ties between the communities and cultures they move between.

As they create paintings, beadwork, photographs, and films, four international artists reveal the complex ties between the communities and cultures they move between.

As they create paintings, beadwork, photographs, and films, four international artists reveal the complex ties between the communities and cultures they move between.

As they create paintings, beadwork, photographs, and films, four international artists reveal the complex ties between the communities and cultures they move between.

Lee helps a homeowner plant a row of arborvitae trees for a privacy border; Mark breaks down the various tools that can be found in the average fireplace set; Tom and Kevin demonstrate how to build a storage rack for container totes using 2x4s.

Lee helps a homeowner plant a row of arborvitae trees for a privacy border; Mark breaks down the various tools that can be found in the average fireplace set; Tom and Kevin demonstrate how to build a storage rack for container totes using 2x4s.

Lee helps a homeowner plant a row of arborvitae trees for a privacy border; Mark breaks down the various tools that can be found in the average fireplace set; Tom and Kevin demonstrate how to build a storage rack for container totes using 2x4s.

Nathan and his dad, Bill, help install an 1800s pocket door with reclaimed hardware; Ross explains the technological advancements of induction cooktops; Kevin meets maker Char Miller-King and build a Shaker-style-inspired end table together.

Lee helps a homeowner plant a row of arborvitae trees for a privacy border; Mark breaks down the various tools that can be found in the average fireplace set; Tom and Kevin demonstrate how to build a storage rack for container totes using 2x4s.

Nathan and his dad, Bill, help install an 1800s pocket door with reclaimed hardware; Ross explains the technological advancements of induction cooktops; Kevin meets maker Char Miller-King and build a Shaker-style-inspired end table together.

Kevin heads to Chicago to learn about fire dangers in homes and how to prevent them.

Watch Tom and Kevin create a bookshelf using stair treads and minimal tools in "Build It.

Jenn visits a Rhode Island sod farm to see what sustainable grass alternatives they've been experimenting with; Tom and Kevin discuss the most common types of nail head and shank designs; Heath brightens up a dark driveway.

Lee helps a homeowner plant a row of arborvitae trees for a privacy border; Mark breaks down the various tools that can be found in the average fireplace set; Tom and Kevin demonstrate how to build a storage rack for container totes using 2x4s.

Lee helps a homeowner plant a row of arborvitae trees for a privacy border; Mark breaks down the various tools that can be found in the average fireplace set; Tom and Kevin demonstrate how to build a storage rack for container totes using 2x4s.

Watch Richard replace a tank water heater with a more efficient model.

Lee helps a homeowner plant a row of arborvitae trees for a privacy border; Mark breaks down the various tools that can be found in the average fireplace set; Tom and Kevin demonstrate how to build a storage rack for container totes using 2x4s.

Lee helps a homeowner plant a row of arborvitae trees for a privacy border; Mark breaks down the various tools that can be found in the average fireplace set; Tom and Kevin demonstrate how to build a storage rack for container totes using 2x4s.

Lee helps a homeowner plant a row of arborvitae trees for a privacy border; Mark breaks down the various tools that can be found in the average fireplace set; Tom and Kevin demonstrate how to build a storage rack for container totes using 2x4s.

Jenn visits a Rhode Island sod farm to see what sustainable grass alternatives they've been experimenting with; Tom and Kevin discuss the most common types of nail head and shank designs; Heath brightens up a dark driveway.

Jenn visits a Rhode Island sod farm to see what sustainable grass alternatives they've been experimenting with; Tom and Kevin discuss the most common types of nail head and shank designs; Heath brightens up a dark driveway.

Jenn visits a Rhode Island sod farm to see what sustainable grass alternatives they've been experimenting with; Tom and Kevin discuss the most common types of nail head and shank designs; Heath brightens up a dark driveway.

Jenn visits a Rhode Island sod farm to see what sustainable grass alternatives they've been experimenting with; Tom and Kevin discuss the most common types of nail head and shank designs; Heath brightens up a dark driveway.

Jenn visits a Rhode Island sod farm to see what sustainable grass alternatives they've been experimenting with; Tom and Kevin discuss the most common types of nail head and shank designs; Heath brightens up a dark driveway.

Unsafe and ready to break? Tom skillfully replaces a cracked deck board on a front porch.

Rocket scientist turned HVAC innovator-watch Richard meet the man behind a new technology that could revolutionize the way we heat and cool homes.

Nathan Gilbert travels to a Mississippi Navy Seabees base, where he learned carpentry as part of his naval training, to see what his former battalion have been working on; Tom Silva walks Kevin O'Connor through different types of trailer hitches, their uses, and what to consider for safe towing; Mauro Henrique helps a homeowner repaint her peeling galvanized stair railing.

Jenn visits a Rhode Island sod farm to see what sustainable grass alternatives they've been experimenting with; Tom and Kevin discuss the most common types of nail head and shank designs; Heath brightens up a dark driveway.

Jenn visits a Rhode Island sod farm to see what sustainable grass alternatives they've been experimenting with; Tom and Kevin discuss the most common types of nail head and shank designs; Heath brightens up a dark driveway.

Bedroom, home office and master closet all in one!

Jenn visits a Rhode Island sod farm to see what sustainable grass alternatives they've been experimenting with; Tom and Kevin discuss the most common types of nail head and shank designs; Heath brightens up a dark driveway.

Jenn visits a Rhode Island sod farm to see what sustainable grass alternatives they've been experimenting with; Tom and Kevin discuss the most common types of nail head and shank designs; Heath brightens up a dark driveway.

Jenn visits a Rhode Island sod farm to see what sustainable grass alternatives they've been experimenting with; Tom and Kevin discuss the most common types of nail head and shank designs; Heath brightens up a dark driveway.

Nathan Gilbert travels to a Mississippi Navy Seabees base, where he learned carpentry as part of his naval training, to see what his former battalion have been working on; Tom Silva walks Kevin O'Connor through different types of trailer hitches, their uses, and what to consider for safe towing; Mauro Henrique helps a homeowner repaint her peeling galvanized stair railing.

Nathan Gilbert travels to a Mississippi Navy Seabees base, where he learned carpentry as part of his naval training, to see what his former battalion have been working on; Tom Silva walks Kevin O'Connor through different types of trailer hitches, their uses, and what to consider for safe towing; Mauro Henrique helps a homeowner repaint her peeling galvanized stair railing.

Nathan Gilbert travels to a Mississippi Navy Seabees base, where he learned carpentry as part of his naval training, to see what his former battalion have been working on; Tom Silva walks Kevin O'Connor through different types of trailer hitches, their uses, and what to consider for safe towing; Mauro Henrique helps a homeowner repaint her peeling galvanized stair railing.

Nathan Gilbert travels to a Mississippi Navy Seabees base, where he learned carpentry as part of his naval training, to see what his former battalion have been working on; Tom Silva walks Kevin O'Connor through different types of trailer hitches, their uses, and what to consider for safe towing; Mauro Henrique helps a homeowner repaint her peeling galvanized stair railing.

Nathan Gilbert travels to a Mississippi Navy Seabees base, where he learned carpentry as part of his naval training, to see what his former battalion have been working on; Tom Silva walks Kevin O'Connor through different types of trailer hitches, their uses, and what to consider for safe towing; Mauro Henrique helps a homeowner repaint her peeling galvanized stair railing.

High tech and using less water than ever before - Richard's in Seattle to help a couple pick the most efficient washer and dryer.

Watch Kevin work with an accessibility contractor to assemble a home elevator for a teen injured during the war in Afghanistan.

Nathan Gilbert travels to a Mississippi Navy Seabees base, where he learned carpentry as part of his naval training, to see what his former battalion have been working on; Tom Silva walks Kevin O'Connor through different types of trailer hitches, their uses, and what to consider for safe towing; Mauro Henrique helps a homeowner repaint her peeling galvanized stair railing.

Nathan Gilbert travels to a Mississippi Navy Seabees base, where he learned carpentry as part of his naval training, to see what his former battalion have been working on; Tom Silva walks Kevin O'Connor through different types of trailer hitches, their uses, and what to consider for safe towing; Mauro Henrique helps a homeowner repaint her peeling galvanized stair railing.

Chicago's all about the "L" train, but Tom's focused on a one-car garage.

Nathan Gilbert travels to a Mississippi Navy Seabees base, where he learned carpentry as part of his naval training, to see what his former battalion have been working on; Tom Silva walks Kevin O'Connor through different types of trailer hitches, their uses, and what to consider for safe towing; Mauro Henrique helps a homeowner repaint her peeling galvanized stair railing.

Nathan Gilbert travels to a Mississippi Navy Seabees base, where he learned carpentry as part of his naval training, to see what his former battalion have been working on; Tom Silva walks Kevin O'Connor through different types of trailer hitches, their uses, and what to consider for safe towing; Mauro Henrique helps a homeowner repaint her peeling galvanized stair railing.

Nathan Gilbert travels to a Mississippi Navy Seabees base, where he learned carpentry as part of his naval training, to see what his former battalion have been working on; Tom Silva walks Kevin O'Connor through different types of trailer hitches, their uses, and what to consider for safe towing; Mauro Henrique helps a homeowner repaint her peeling galvanized stair railing.

Lee helps a couple regrade their backyard to improve the lawn's health; Jenn shares houseplants that thrive at any light level, proving there's a perfect plant for every space; Nathan upgrades a homeowner's hollow-core doors to solid-core doors.

Lee helps a couple regrade their backyard to improve the lawn's health; Jenn shares houseplants that thrive at any light level, proving there's a perfect plant for every space; Nathan upgrades a homeowner's hollow-core doors to solid-core doors.

Lee helps a couple regrade their backyard to improve the lawn's health; Jenn shares houseplants that thrive at any light level, proving there's a perfect plant for every space; Nathan upgrades a homeowner's hollow-core doors to solid-core doors.

Lee helps a couple regrade their backyard to improve the lawn's health; Jenn shares houseplants that thrive at any light level, proving there's a perfect plant for every space; Nathan upgrades a homeowner's hollow-core doors to solid-core doors.

Lee helps a couple regrade their backyard to improve the lawn's health; Jenn shares houseplants that thrive at any light level, proving there's a perfect plant for every space; Nathan upgrades a homeowner's hollow-core doors to solid-core doors.

Out with the flagstone and in with the bluestone - Roger changes a dilapidated entrance into a welcoming walkway.

Richard to the rescue - see him diagnose a malfunctioning hot water radiator and give a lesson on diverter tees.