Work on the Dutch Colonial Revival continues as master carpenter Norm Abram recaps the progress on the addition, then turns his attention to the kitchen where general contractor Tom Silva and host Kevin O'Connor are working to reframe the existing walls to accommodate new door and window openings. Upstairs, Tom installs a large new window in the library that is really six individual window units grouped together, while downstairs, kitchen designer Tamara Raymond helps homeowner Gillian Pierce envision her new kitchen with the help of paper mock-ups. Kevin pays a visit to former This Old House architect Treff LaFleche to see how he renovated his 1906 Gambrel-style Victorian to achieve superior energy efficiency and a LEED green building certification.