Master carpenter Norm Abram and general contractor Tom Silva rebuild the front door surround to eliminate rot and also to create a more attractive and historically accurate entranceway. Certified arborist Matt Foti inspects the ailing American beech tree, and finding die back and root compaction, prescribes deep root injections that will both amend and aerate the soil. Host Kevin O'Connor meets nurse-turned-general contractor Monica MacKenzie at an antique home she recently renovated in Hingham, Massachusetts. Back in Bedford, interior designers Dee Elms and Andrew Terrat show Kevin and homeowner Becky Titlow where the design for the new space is headed - a sophisticated blend of modern and rustic elements that will be comfortable and low maintenance for the family. In the second half of the hour, on ASK THIS OLD HOUSE, Tom travels to Philadelphia to help a homeowner put the finishing touch on a backyard pizza oven. Then Tom, along with Kevin, landscape contractor Roger Cook, and plumbing and heating expert Richard Trethewey, asks, "What is it?" Afterward, Richard shows Kevin how to apply teflon tape, pipe dope and wicking to threaded pipe connections.