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S20 E38, Jenn Nawada helps maintain a backyard pond

S20 E38: Pond Maintenance, Demilune Table

In this episode, Mark explains finishes for brick and concrete; Jenn shows how to maintain a small backyard pond, and Tom builds a three-legged Demilune table.

S20 E37, Richard Trethewey discusses keeping basements dry with Kevin O’Connor

S20 E37: Deck Chairs, Damp Basement

In this episode, Tom shares a trick to evenly space balusters; Heath shows how to drill holes in studs to run wire; Jenn Largesse builds DIY deck chairs; Richard explains how to deal with a damp basement.

S20 E36, Jenn Nawada teaches Kevin O’Connor how to test soil

S20 E36: Soil Testing, Adding a Receptacle

Mauro shares why he became a painter and what he loves about his job; Jenn shows how to test soil at home; Heath adds a receptacle to a kitchen island.

S20 E35, Tom Silva demonstrates crown molding to Kevin O’Connor

S20 E35: Crown Molding, Future of Solar

In this episode, Heath Eastman shares why he became an electrician, and Mauro Henrique shows a trick for applying caulk in gaps. Then, Tom Silva demonstrates how to install crown molding around corner angles, and Ross Trethewey explains the future of solar at MIT.

S20 E34, Nathan Gilbert discusses finish nailers

S20 E34: Light Fixture, Finish Nailers

In this episode, Kevin O’Connor shares how he became the host of Ask This Old House, and Tom Silva shows a trick for drawing a perfect ellipse. Heath Eastman moves a light fixture, and Mauro Henrique patches the ceiling. Then, Nathan explains the basics of finish nailers.

S20 E33, Ross Trethewey assists his father Richard in explaining air flow to Kevin O’Connor

S20 E33: Celebrating Fathers as Mentors

In this episode, the Ask This Old House team members talk about their fathers as mentors. Then, Richard and Ross Trethewey explain airflow in buildings, and Tom Silva finishes a baseball bat display case.

S20 E32, Heath Eastman discusses electrical tools in the Tool Lab

S20 E32: Electrical Tools, Energy Audit

Watch as Heath demonstrates using common electrical tools. Later, Ross conducts an in-depth home energy assessment, and Mauro shares one of his favorite painting tips.

S20 E33, Tom Silva and his parents

Ask TOH Celebrates Their Fathers as Mentors

Ask This Old House team members talk about how their fathers shaped their lives and careers.

S20 E30, Richard Trethewey shows Kevin O’Connor how to replace a toilet seat

S20 E30: Toilet Seat, Lockset Repair

Richard shows how to replace a toilet seat; Jenn Largesse builds a pergola for her backyard; Nathan repairs a century-old full mortise lockset.

S20 E29, Mauro Henrique refinishes a deck rail

S20 E29: Hydrangeas, Deck Railing

Watch as Jenn shows off different varieties of hydrangeas; Heath explains the types of smoke and carbon monoxide detectors and their functions, and Mauro refinishes deck railings and posts.