Out front, the porch story continues as general contractor Tom Silva shows host Kevin O'Connor how he is replacing the old rotting wood trim boards with new rot-resistant PVC material. In the basement, plumbing and heating expert Richard Trethewey shows homeowner Liz Bagley why her aging oil tanks need replacing. The new double-wall tanks are seamless galvanized steel on the outside, and high-density polyethylene on the inside to resist corrosion and leaks. Master electrician Allen Gallant shows Kevin why he is using IC rated recessed lights, as well as how to properly install them. To experience a day in the life of the East Boston waterfront, Kevin accompanies a state-of-the-art tractor tugboat on a mission to guide a container ship safely through the harbor. Back at the project house, roofing specialist Rich Kline shows Kevin the reinforced elastomeric membrane roofing system going down on the front porch roof.