Hard rain doesn't appear to hold back progress on the Charlestown renovation. Dan climbs the new scaffolding to take in the gray view of the city and to discuss the issues of putting a roof deck on the building's hip roof. Meanwhile, host Steve Thomas learns about filling in a flue channel, which is a structural element of the house before finding out the prognosis of the plaster from preservationist Rory Brennan. Richard takes Heather to a nearby plumbing salvage yard to see if owner Fran Fahey might be interested in swapping a classic clawfoot tub and pedestal sink for the fancy radiators her house no longer needs. The work on the basement hits a milestone as the new floor is poured, and Tom and Dan waste no time laying out and framing in the new rooms in the basement once the floor is set.