Landscape restoration specialist Kate Venturini arrives from the University of Rhode Island to create a sustainable coastal landscape with the help of local landscape contractor Henry Pereira. Builder Andy Tiplady finishes up the shingles and trim at the master bedroom porch just in time for local metalsmiths to install the custom copper gutter and scupper that will keep rain out of the space. Members of the URI Master Gardener's association lend a hand installing coastal tolerant and native plants on the site, while local sod grower Pat Hogan delivers a freshly harvested fescue/bluegrass blend that will require less water, less fertilizer and less maintenance overall. Renewable energy expert Ross Trethewey makes his debut on the series by taking host Kevin O'Connor to see a lighthouse that is also an off-the-grid bed and breakfast for sustainability enthusiasts. Back in Barrington, plumbing and heating expert Richard Trethewey meets solar hot water contractor Mick Dunn to see the system he's using for the house and how he properly installs it to withstand the high winds in the area. In the second half of the hour, on ASK THIS OLD HOUSE, landscape contractor Roger Cook travels to Dallas to help a homeowner plant a garden using native species that are drought-tolerant. Then, general contractor Tom Silva helps a homeowner remove a door and replace it with a window.