E19 | Radiant Floor, Cable Railings | Ask This Old House

Richard Trethewey shares his appreciation for modern plumbing, then helps a homeowner with an all-electric heating system retrofit a radiant floor system under their bathroom; Nathan Gilbert shares connection options and maintenance for cable railings; Jenn Nawada shares changes to the USDA Plant Hardiness Zone map and how to use the information to select the best plants for a landscape.