Landscape contractor Roger Cook helps homeowner Brian Grace remove poison ivy from his backyard without the use of herbicides. Back in the loft, Roger, plumbing and heating expert Richard Trethewey, general contractor Tom Silva and host Kevin O'Conno... (more)r try to guess "What is it?" Then Tom shows homeowner Dan Nutton how to install cedar shingles and weave an outside corner on his house in Lowell, Massachusetts.