Overview: The crew prepares an opening to accept a new window. Housewrap is discussed, and inside our general contractor demonstrates how he is triming out the windows with engineered wood trim. Upstairs, our host discusses various parts of the library's design with Brian and Jan, and we see how mason Lenny Belleveau built the library's fireplace. We then meets Todd Dumas, who is putting the copper valleys onto the building. Our host shows the ridge vents that are part of the roof venting system, then catches up with electrician Paul Kennedy, who shows the mix of new and old wiring he's facing.