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Upgrading a fireplace; different landscape tools and how to maintain them for spring; building a bathtub tray out of zebrawood.
Exploring wetlands; indoor air quality testing; repainting an exterior concrete foundation.
Replacing a leaking gas oven; creating a pollinator garden at home; applying wireless electricity technology to electric vehicle chargers in future homes.
Season 21 of Ask This Old House brings back Kevin, Tommy, Richard, Jenn, and the crew, as they help homeowners tackle their most challenging home improvement projects.