This Old House Hour

Digging for energy: geothermal bore holes are filled and grouted. General contractor Tom Silva shows how to weave shingles around a corner for a cottage look, and Norm helps him mill and install custom PVC window trim with standard stock from the home center. In the second half of the hour, on ASK THIS OLD HOUSE, Richard visits Cortland, Illinois, to learn how corn is harvested and then to help a homeowner insulate his ductwork. Then, Roger demonstrates proper pruning technique. Richard, along with Kevin, Roger and Tom, asks, "What is it?" Afterward, Kevin learns how to maintain clothes washers and dryers.