Plumbing and heating expert Richard Trethewey helps a homeowner remove a baseboard heater to prepare for a complete remodeling of his bathroom. After the bathroom is transformed, Richard returns to help the homeowner install radiant heat. Back in the loft, Richard, general contractor Tom Silva, landscape contractor Roger Cook, and host Kevin O'Connor try to identify unfamiliar objects in the "What is it?" segment. Then painting expert Jim Clark helps a homeowner prepare his aluminum siding for a brand-new paint job.