Ask This Old House

Mauro brightens a dark apartment using paint concentrations; Mark and Richard discuss what naturally causes wet basements and how to mitigate it; Tom and Kevin build a bat house.

Mauro brightens a dark apartment using paint concentrations; Mark and Richard discuss what naturally causes wet basements and how to mitigate it; Tom and Kevin build a bat house.

Jenn travels to Orlando to upgrade an irrigation system; the team looks at more Home Inspection Nightmares; Tom discusses kitchen renovations; Kevin returns to upstate New York to build an Adirondack-style outdoor chair with maker Jimmy DiResta.

Mauro brightens a dark apartment using paint concentrations; Mark and Richard discuss what naturally causes wet basements and how to mitigate it; Tom and Kevin build a bat house.

Mauro brightens a dark apartment using paint concentrations; Mark and Richard discuss what naturally causes wet basements and how to mitigate it; Tom and Kevin build a bat house.

Mauro brightens a dark apartment using paint concentrations; Mark and Richard discuss what naturally causes wet basements and how to mitigate it; Tom and Kevin build a bat house.

Lee revives a homeowner's garden bed; a New Hampshire painter shares how she got into the trade; Heath installs a bathroom fan in a house with bad wiring.

Lee revives a homeowner's garden bed; a New Hampshire painter shares how she got into the trade; Heath installs a bathroom fan in a house with bad wiring.

Lee revives a homeowner's garden bed; a New Hampshire painter shares how she got into the trade; Heath installs a bathroom fan in a house with bad wiring.

Lee revives a homeowner's garden bed; a New Hampshire painter shares how she got into the trade; Heath installs a bathroom fan in a house with bad wiring.

Richard updates a water filter on a retro faucet; Mark explains the uses for different types of masonry jointers; Nathan explains when and how to use a Japanese pull saw; Tom demonstrates the materials and techniques needed for re-caulking a bathtub.

Ross helps a homeowner install a smart thermostat after discovering a wiring issue; Mauro shares his tips on staining a deck to protect and maintain it; Mark helps a homeowner clean a bluestone patio.

Lee revives a homeowner's garden bed; a New Hampshire painter shares how she got into the trade; Heath installs a bathroom fan in a house with bad wiring.

Lee revives a homeowner's garden bed; a New Hampshire painter shares how she got into the trade; Heath installs a bathroom fan in a house with bad wiring.

Mark repoints a fieldstone foundation and shares a lesson about water management on the outside of a house; Tom discusses disposal techniques for oily rags to prevent spontaneous combustion; instead of scraping, Mauro smooths over a textured ceiling.

Lee revives a homeowner's garden bed; a New Hampshire painter shares how she got into the trade; Heath installs a bathroom fan in a house with bad wiring.

Lee revives a homeowner's garden bed; a New Hampshire painter shares how she got into the trade; Heath installs a bathroom fan in a house with bad wiring.

Lee revives a homeowner's garden bed; a New Hampshire painter shares how she got into the trade; Heath installs a bathroom fan in a house with bad wiring.

Ross helps a homeowner install a smart thermostat after discovering a wiring issue; Mauro shares his tips on staining a deck to protect and maintain it; Mark helps a homeowner clean a bluestone patio.

Ross helps a homeowner install a smart thermostat after discovering a wiring issue; Mauro shares his tips on staining a deck to protect and maintain it; Mark helps a homeowner clean a bluestone patio.

Ross helps a homeowner install a smart thermostat after discovering a wiring issue; Mauro shares his tips on staining a deck to protect and maintain it; Mark helps a homeowner clean a bluestone patio.

Ross helps a homeowner install a smart thermostat after discovering a wiring issue; Mauro shares his tips on staining a deck to protect and maintain it; Mark helps a homeowner clean a bluestone patio.

Tom teaches a homeowner how to replace split-level stair treads in his mid-century modern home; Jenn shares tips about pruners; Richard shortens a gas pipe for a new stove that does not fit against the wall because it is getting stuck on the pipe.

Roger and Jenn share tips for killing weeds without hurting the lawn; Mark restores a historic fireplace that is built with custom bricks; Richard and Ross discuss improvements to thermostats; Tom adds structure to a porch to safely hang a swing.

Ross discusses IAQ testing; Mark restores a Victorian firebox; Jenn and Lee discuss transitioning landscapes from Spring to Summer; Tom, Kevin, and Zack Dettmore organize a tool storage cabinet.

Ross helps a homeowner install a smart thermostat after discovering a wiring issue; Mauro shares his tips on staining a deck to protect and maintain it; Mark helps a homeowner clean a bluestone patio.

Ross helps a homeowner install a smart thermostat after discovering a wiring issue; Mauro shares his tips on staining a deck to protect and maintain it; Mark helps a homeowner clean a bluestone patio.

Ross tests a smart stud finder; Nathan travels to Oregon to repair a wood floor that was burned from a hot iron; Tom shares the best techniques to use a table saw safely; Jenn replaces and improves foundation plantings that were crushed by snow.

Ross helps a homeowner install a smart thermostat after discovering a wiring issue; Mauro shares his tips on staining a deck to protect and maintain it; Mark helps a homeowner clean a bluestone patio.

Ross helps a homeowner install a smart thermostat after discovering a wiring issue; Mauro shares his tips on staining a deck to protect and maintain it; Mark helps a homeowner clean a bluestone patio.

Ross helps a homeowner install a smart thermostat after discovering a wiring issue; Mauro shares his tips on staining a deck to protect and maintain it; Mark helps a homeowner clean a bluestone patio.

Ross discusses IAQ testing; Mark restores a Victorian firebox; Jenn and Lee discuss transitioning landscapes from Spring to Summer; Tom, Kevin, and Zack Dettmore organize a tool storage cabinet.

Ross discusses IAQ testing; Mark restores a Victorian firebox; Jenn and Lee discuss transitioning landscapes from Spring to Summer; Tom, Kevin, and Zack Dettmore organize a tool storage cabinet.

Ross discusses IAQ testing; Mark restores a Victorian firebox; Jenn and Lee discuss transitioning landscapes from Spring to Summer; Tom, Kevin, and Zack Dettmore organize a tool storage cabinet.

Ross discusses IAQ testing; Mark restores a Victorian firebox; Jenn and Lee discuss transitioning landscapes from Spring to Summer; Tom, Kevin, and Zack Dettmore organize a tool storage cabinet.

Richard travels to Orlando to diagnose and repair an HVAC system that's creating way too much humidity; Mark demonstrates the best way to build a fire to prevent smoke from filling up the room; Mauro teaches a homeowner how to re-stain a deck.

Tom demonstrates how to sharpen a knife; Mauro teaches a homeowner how to re-stain her deck; Mark demonstrates the best way to build a fire to prevent smoke from filling up the room; Ross learns about innovations to automatic water shutoff valves.

Jenn heads to Portland to check out the International Rose Test Garden; Nathan helps a homeowner replace damaged bathroom tiles; wrapping up the season, the team reviews comments left by show viewers.

Ross discusses IAQ testing; Mark restores a Victorian firebox; Jenn and Lee discuss transitioning landscapes from Spring to Summer; Tom, Kevin, and Zack Dettmore organize a tool storage cabinet.

Ross discusses IAQ testing; Mark restores a Victorian firebox; Jenn and Lee discuss transitioning landscapes from Spring to Summer; Tom, Kevin, and Zack Dettmore organize a tool storage cabinet.

Jenn helps a homeowner add curb appeal to his house using Victorian plants to match its design; the team shares more home inspection nightmares; Mauro demonstrates how to accurately match paint color; Tom and Kevin hand carve wooden serving utensils.

Ross discusses IAQ testing; Mark restores a Victorian firebox; Jenn and Lee discuss transitioning landscapes from Spring to Summer; Tom, Kevin, and Zack Dettmore organize a tool storage cabinet.

Ross discusses IAQ testing; Mark restores a Victorian firebox; Jenn and Lee discuss transitioning landscapes from Spring to Summer; Tom, Kevin, and Zack Dettmore organize a tool storage cabinet.

Ross discusses IAQ testing; Mark restores a Victorian firebox; Jenn and Lee discuss transitioning landscapes from Spring to Summer; Tom, Kevin, and Zack Dettmore organize a tool storage cabinet.

Jenn heads to Portland to check out the International Rose Test Garden; Nathan helps a homeowner replace damaged bathroom tiles; wrapping up the season, the team reviews comments left by show viewers.

Jenn heads to Portland to check out the International Rose Test Garden; Nathan helps a homeowner replace damaged bathroom tiles; wrapping up the season, the team reviews comments left by show viewers.

Jenn heads to Portland to check out the International Rose Test Garden; Nathan helps a homeowner replace damaged bathroom tiles; wrapping up the season, the team reviews comments left by show viewers.

Jenn heads to Portland to check out the International Rose Test Garden; Nathan helps a homeowner replace damaged bathroom tiles; wrapping up the season, the team reviews comments left by show viewers.

Tom repairs a rotted porch post. Richard visits New Orleans, Louisiana, to help a family deal with high indoor humidity.

Tom helps a homeowner fit a box spring mattress up a narrow staircase.

Tom and Kevin create a two-layered hexagonal herb planter for the garden; Jenn explains materials to build a raised garden bed; Jenn and Nathan team up to help his nieces' Girl Scout troop rebuild and replant their community garden beds.

Jenn heads to Portland to check out the International Rose Test Garden; Nathan helps a homeowner replace damaged bathroom tiles; wrapping up the season, the team reviews comments left by show viewers.

Jenn heads to Portland to check out the International Rose Test Garden; Nathan helps a homeowner replace damaged bathroom tiles; wrapping up the season, the team reviews comments left by show viewers.

Tom installs a permanent fire escape ladder in a bedroom.

Jenn heads to Portland to check out the International Rose Test Garden; Nathan helps a homeowner replace damaged bathroom tiles; wrapping up the season, the team reviews comments left by show viewers.

Jenn heads to Portland to check out the International Rose Test Garden; Nathan helps a homeowner replace damaged bathroom tiles; wrapping up the season, the team reviews comments left by show viewers.

Jenn heads to Portland to check out the International Rose Test Garden; Nathan helps a homeowner replace damaged bathroom tiles; wrapping up the season, the team reviews comments left by show viewers.

Tom and Kevin create a two-layered hexagonal herb planter for the garden; Jenn explains materials to build a raised garden bed; Jenn and Nathan team up to help his nieces' Girl Scout troop rebuild and replant their community garden beds.

Tom and Kevin create a two-layered hexagonal herb planter for the garden; Jenn explains materials to build a raised garden bed; Jenn and Nathan team up to help his nieces' Girl Scout troop rebuild and replant their community garden beds.

Tom and Kevin create a two-layered hexagonal herb planter for the garden; Jenn explains materials to build a raised garden bed; Jenn and Nathan team up to help his nieces' Girl Scout troop rebuild and replant their community garden beds.

Tom and Kevin create a two-layered hexagonal herb planter for the garden; Jenn explains materials to build a raised garden bed; Jenn and Nathan team up to help his nieces' Girl Scout troop rebuild and replant their community garden beds.

Roger visits Biloxi, Mississippi, where he builds a high tunnel greenhouse with a homeowner.

Richard helps a homeowner in New Hampshire quiet a squealing shower.

Heath helps a homeowner install remote controlled patio string lights over their backyard patio; Mauro color matches and repaints a homeowners retro aqua kitchen cabinet; Tom talks through specialized levels for different types of projects.

Tom and Kevin create a two-layered hexagonal herb planter for the garden; Jenn explains materials to build a raised garden bed; Jenn and Nathan team up to help his nieces' Girl Scout troop rebuild and replant their community garden beds.

Tom and Kevin create a two-layered hexagonal herb planter for the garden; Jenn explains materials to build a raised garden bed; Jenn and Nathan team up to help his nieces' Girl Scout troop rebuild and replant their community garden beds.

Roger shows Kevin how to start plants from seed. Richard replaces an outdoor hose spigot with one that will never freeze.

Tom and Kevin create a two-layered hexagonal herb planter for the garden; Jenn explains materials to build a raised garden bed; Jenn and Nathan team up to help his nieces' Girl Scout troop rebuild and replant their community garden beds.

Tom and Kevin create a two-layered hexagonal herb planter for the garden; Jenn explains materials to build a raised garden bed; Jenn and Nathan team up to help his nieces' Girl Scout troop rebuild and replant their community garden beds.

Tom and Kevin create a two-layered hexagonal herb planter for the garden; Jenn explains materials to build a raised garden bed; Jenn and Nathan team up to help his nieces' Girl Scout troop rebuild and replant their community garden beds.

Heath helps a homeowner install remote controlled patio string lights over their backyard patio; Mauro color matches and repaints a homeowners retro aqua kitchen cabinet; Tom talks through specialized levels for different types of projects.

Heath helps a homeowner install remote controlled patio string lights over their backyard patio; Mauro color matches and repaints a homeowners retro aqua kitchen cabinet; Tom talks through specialized levels for different types of projects.

Heath helps a homeowner install remote controlled patio string lights over their backyard patio; Mauro color matches and repaints a homeowners retro aqua kitchen cabinet; Tom talks through specialized levels for different types of projects.

Heath helps a homeowner install remote controlled patio string lights over their backyard patio; Mauro color matches and repaints a homeowners retro aqua kitchen cabinet; Tom talks through specialized levels for different types of projects.

Roger helps a homeowner plant a low-cost, low-maintenance privacy screen.

Richard helps a homeowner replace a shower valve that shuts off mysteriously.

AskTOH welcomes Landscape Contractor, Lee Gilliam to the cast; Richard helps a homeowner repair a leaking 3-valve shower while retaining the bathrooms original 1930's tile; Lee and Jenn work together to refresh a homeowner's eroding sloped yard.

Heath helps a homeowner install remote controlled patio string lights over their backyard patio; Mauro color matches and repaints a homeowners retro aqua kitchen cabinet; Tom talks through specialized levels for different types of projects.

Heath helps a homeowner install remote controlled patio string lights over their backyard patio; Mauro color matches and repaints a homeowners retro aqua kitchen cabinet; Tom talks through specialized levels for different types of projects.

In this special program, the guys celebrate 300 episodes of ASK THIS OLD HOUSE by looking back at some of their best moments and revealing some behind-the-scenes secrets.