Work continues on the Auburndale project, as general contractor Tom Silva and master carpenter Norm Abram frame the flat roof over the new sunroom. To shed water, the roof will be pitched slightly. Tom accomplishes this by tapering both the LVLs and the roof rafters. Plumbing and heating expert Richard Trethewey shows Norm an expensive change order in the basement bathroom, and he also shares the news that the homeowners have decided to add air conditioning. Meanwhile, host Kevin O'Connor visits the Boston Public Library to learn about the former resident of the home, one of Boston's most famous street photographers, Jules Aarons. At the library, Curator Aaron Schmidt and son Phillip Aarons share their perspectives on the man and his work. On the second floor, Richard shows Kevin the progress on the rough plumbing and explains the layout of the new back-to-back bathrooms. Out on the future roof deck, Kevin finds Tom finishing up installing the underlayment on the flat roof. He lends a hand gluing down the rubber membrane, overlapping the sections, and caulking the joints.