Ask This Old House season 22 episode 24
Episode title: Smart Thermostat Wires, Bluestone Cleaning
Ross Trethewey helps a homeowner install a smart thermostat after discovering he's missing a common wire; Mauro Henrique shares deck staining tips, what stain options are available, and the level of maintenance required for each type of stain; Mark McCullough helps a homeowner revive his bluestone patio by showing how to use the appropriate tools and materials to clean it.
