Roger rolls out a truckload of fresh sod. Tom installs a replica ceiling medallion made using a 3D printer; then he installs a custom copper vent hood. Richard selects the right garbage disposer at a local home center. Norm gives a lesson in crown molding, while Richard installs a pedestal sink in the powder room. Closet designer Mary Cool shows Kevin how she's customizing the master closet for maximum storage. In the second half of the hour, on ASK THIS OLD HOUSE, electrician Scott Caron replaces outdated fluorescent under-cabinet lights with new LED fixtures. Roger and Kevin demonstrate how to work with concrete. Richard teaches Tom about the energy savings potential of temperature setbacks on thermostats.